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Do you have a passion for space and experience with complex projects?

Holt Executive has partnered with a leader in nanosatellites manufacturing and operation, to provide custom communication solutions for their clients. They are seeking a Lead Space Systems Engineer to join their team in Luxembourg.

The Lead Space Systems Engineer will be responsible for spearheading the design, construction, and delivery of small satellites for their global clientele. You will be the driving force, encompassing the entire project lifecycle, from initial product review to final client acceptance.

Key Responsibilities for the Lead Space Systems Engineer:

• Spacecraft systems design and architecture – both overall and in detail with hands-on work.
• Coordinating technical activities with customers and suppliers.
• Alignment of mission and spacecraft design to ESA standards
• Technical consulting with international clients.
• Coaching and guidance of non-senior engineers.
• Prepare documentation according to applied space engineering standards.
• Technical involvement in all aspects of mission and spacecraft design.
• Ensuring a proper balance between time consumption and quality.
• Assignment planning using SCRUM and JIRA

Key Skills and Experience Required by the Lead Space Systems Engineer:

• Possess several years of experience designing satellites, ideally honed on cutting-edge new space projects.
• Demonstrate proficiency in applying systems engineering principles (requirements analysis, architecture, simulation, integration, verification & validation) to deliver successful projects.
• Experience delivering projects according to established standards like ESA ECSS or NASA equivalents.
• Possess strong analytical and problem-solving skills to tackle complex technical challenges head-on.
• Proven experience in systems validation, qualification, and ensuring optimal performance.
• Proficiency in programming or scripting languages (e.g., XML, Python, Matlab) can be beneficial.
• Be adept at utilising CAD and mission tools such as SOLIDWORKS, STK, GMAT, or similar software.
• Maintain a strong quality awareness and understanding of aerospace quality assurance processes and standards in the aerospace industry.
• Identify and mitigate risks associated with space missions and projects.
• Demonstrate a solid understanding of the functional aspects involved in building and developing spacecraft.

If your skills and experience match this Lead Space Systems Engineer opportunity, we encourage you to apply by sending your CV to info@holtexecutive.com

Do you have a passion for electronics and a desire to work on cutting-edge projects?

Holt Executive are partnered with a leading manufacturer of solar panels for space and beyond who are seeking a talented and motivated Electronics Engineer to join their dynamic R&D team located in Malaga, Spain.

The successful Electronics Engineer will play a key role in all phases of product development, from conception to completion.

Key Responsibilities for the Electronics Engineer:

Qualifications:

• Collecting and attending to customer and product specifications and requirements.
• Utilizing Altium for schematic capture.
• Designing and routing Printed Circuit Boards (PCBs).
• Designing and implementing power converters.
• Developing hardware prototypes and conducting testing.
• Specifying the test pipeline for component evaluation.

Key Skills & Experience Required by the Electronics Engineer:

• A degree in Aerospace, Electronics, Electrical, Industrial, Telecommunication, or Mechatronics.
• 3-5 years of relevant experience as an Electronics Engineer.

Technical Competencies:

• Microprocessor software development.
• FPGA development.
• Debugging digital communication protocols (Ethernet, CAN Bus, …)
• SPICE simulation.
• EMI/EMC notions.
• RF concepts.
• Motor control.

If your skills and experience match this Electronics Engineer opportunity, we encourage you to apply by sending your CV to info@holtexecutive.com

Holt Executive are currently partnered with a global leader in Space and Satellite sustainability, a dynamic and rapidly growing technology innovator who are making hugely positive contributions to the growing problem of orbital space debris.

They require a Spacecraft Systems Engineer Team Lead – Space Sustainability to be responsible for line managing members of the team as well as taking the lead on project work. Therefore, you need to be a senior engineer with hands-on experience of working on spacecraft systems and be at a level where you can come in and start contributing to the projects straight away.

This role will help make a difference every day by ensuring the Systems team is well placed to drive forward our missions and help to make space safer and more sustainable for future generations.

Responsibilities for the Spacecraft Systems Engineer Team Lead – Space Sustainability:

• Line management of team members. This includes helping resolve blockers to their work, prioritising their work, conducting appraisals and conducting probation reviews.
• Planning the technical work for the systems team members. Assigning tasks appropriately and effectively taking team member skillsets and abilities in to account
• Overall responsibility for the technical output of the people being managed
• Create a plan to address the development needs of the existing team members
• Support engineering technical work performed by the team including:
  • The development of spacecraft mission and system design including requirements derivation and CONOPS definition.
  • Rapid feasibility studies into different scenarios and architectures
  • Performing mission analysis and modelling of spacecraft missions as well as Trade-off and control platform systems budgets e.g. mass, power, data, fuel.
  • Maintaining the configuration control of systems work and documentation
  • Coordinate with other teams at sub-system and system level to define development and verification plans.
  • Assist with bid work, providing technical solutions and documentation.

Skills required by the Spacecraft Systems Engineer Team Lead – Space Sustainability:

• Diploma; bachelor or master’s degree in systems engineering, electrical engineering, or another relevant discipline.
• At least 5 years work experience as a systems engineer for a spacecraft mission
• Knowledge of the systems and project engineering lifecycle from requirements definition through to verification, including experience of leading or planning for project review gates in satellite engineering
• Experience in mission and systems architecture definition and CONOPS, especially understanding of both space and ground segment interaction.
• Good knowledge of a range of subsystems & engineering teams including: GNC (AOCS, ADCS), astrodynamics, C&DH / OBDH, EPS, RCS (propulsion), COM (communications), software, ground segment & operations.

Benefits:

• Competitive base salary
• Opportunity to work with a highly talented, diverse & dynamic international team with cutting edge technology
• Flexible working around core hours in a friendly and supportive environment
• Hybrid working available (dependent on individual role requirements)
• 25 days holiday (increasing yearly up to a maximum of 28 days) + 8 days Bank Holiday
• Life insurance and long-term sick pay
• Private healthcare

 
 If your skills and experience match this Spacecraft Systems Engineer Team Lead opportunity, we encourage you to apply by sending your CV to info@holtexecutive.com

Do you have a passion for creating software that powers innovative technology?

Holt Executive are partnered with a leading electro-optics design and manufacturing business, who are seeking an experienced Embedded Software Engineer to join their dynamic team.

If you are a highly skilled and motivated Embedded Software Engineer with a passion for embedded systems and a collaborative spirit, then this opportunity is for you!

Key Responsibilities for the Embedded Software Engineer:

• Play a key role in the entire software development lifecycle, from concept to coding.
• Working with Systems, Mechanical/Electrical and Electronics engineers as part of a team to ensure project success.
• Maintaining oversight of all software requirements and issues for a project
• Develop robust software with particular attention to fault management, fault reporting and health status of applications.
• Produce and maintain related supporting documentation (interface control documentation, input to user manuals, fault code lists and actions).
• Work directly with customers to integrate, commission, and troubleshoot software solutions, sometimes on-site.
• Understand the customer’s technical needs and concept of operations and feed this into wider project requirements.
• Work with the Project Manager, Technical Authority and Quality team as required to identify risks, issues, solutions, and opportunities.
• Ensure significant developments and actions are communicated to relevant personnel in the engineering team and provide technical input to the project manager to allow them to generate and maintain the project plan and monthly project review packs.

Key Skills & Experience Required for the Embedded Software Engineer:

Essential

• Strong degree in a related discipline
• Understanding of embedded software design and appreciation of associated hardware
• Understanding of developing desktop application and user centric interface design

Desirable 
Embedded software/firmware:

• Experience of writing C/C++ for embedded applications and 16bit/32bit microcontrollers
• Experience of using STM32 processors and Keil uVision development environment and tools
• Communications such as Ethernet, RS422/UART, CAN, SPI etc.
• Hardware interfacing, GPIO, ADC, DACs etc.
• Some appreciation of motor control principles and theory

Windows/User interfaces:

• QT and QT Creator– multiplatform development environment in C++
• Visual Studio C++ and C#
• Low latency programming techniques
• Networking (TCP/UDP)

General software:

• Use of source control, particularly SVN and GIT
• Use of Jira and Confluence for software requirements and task capture
• Experience of using unit testing tools and technologies
• Static code analysis

Company Benefits:

• 37.5 hour working week and lunchtime finishes on a Friday.
• 28 days annual leave.
• Christmas closure.
• Employee Help@Hand Service gives you and your family access to 4 key services including remote GP service, second opinion, mental health pathway service, and physiotherapy consultations.
• Life Assurance Policy, including Bereavement Counselling and Probate Helpline.
• Company Share Incentive Plan and Save as You Earn Scheme.
• Wellbeing initiatives, including access to the Aviva Wellbeing App and the addition of mental health support for all employees plus regular activities across our sites to support and promote well-being.
• Employee discounts scheme (inc access to an additional wellbeing hub).
• Excellent Learning & Development opportunities.

If your skills and experience match this Embedded Software Engineer opportunity, we encourage you to apply by sending your CV to info@holtexecutive.com

Holt Executive are partnered with a leading technology and engineering services company that supplies the space and satellite industry. Our partner is involved in a variety of projects ranging from designing and building spacecraft to managing launches and controlling satellites in orbit.

They require an Earth Observation Engineer to support the development of Earth observation (EO) programs and services for national and international organisations, using both operational and scientific data.

Key Responsibilities for the Earth Observation Engineer:

• Support services to ESA included within the Third Party and Heritage Mission element of the Instrument Data Quality Evaluation and Analysis service (IDEAS-QA4EO) and Earthnet Data Assessment Project (EDAP+).
• Proactively identify and investigate data quality anomalies, ensuring the accuracy and reliability of Earth observation data.
• Research and provide comprehensive responses to user inquiries related to technical aspects of data analysis.
• Manage and update local quality control tools and scripts for optimal data processing.
• Contribute to the development of compelling technical proposals to expand business opportunities.

Key Skills and Experience Required by the Earth Observation Engineer:

• University degree/MSc (or equivalent) in Geography, Physics, Remote Sensing or a related discipline.
• Experience/Understanding, in either an industrial or academic setting.

• Supporting operational processing systems for EO data (e.g. level ‘1’ to level ‘2’ and ‘level 3’ processing).
• Working with Optical earth observation data specifically Landsat, Proba-1, JERS-1 and New Space missions (e.g. Planet).
• Using and adapting tools for remote sensing data manipulation.

Benefits:

• Competitive Package, including private healthcare, excellent pension, generous holiday allowance.
• Hybrid working, with the requirement to attend the office in Bedfordshire one day every month.

Due to the nature of the business, all applicants must be eligible to work in the UK and all potential employees will undergo stringent reference and identity checks.

If your skills and experience match this Earth Observation Engineer opportunity, we encourage you to apply by sending your CV to info@holtexecutive.com 

Do you thrive on complex challenges and bringing innovative ideas to life?

Holt Executive are partnered with a leading manufacturing business that develop a wide range of products, from cutting-edge prototypes pushing technological boundaries to proven, reliable electro-optical surveillance systems.

Our partner is seeking a Senior Systems Engineer to work within multi-disciplinary teams to ensure the mechanical, electrical, and software design aspects of a project function seamlessly and the system meets the customer needs.

Key Responsibilities for the Senior Systems Engineer:

• Requirements Capture and management.
• Functional and Physical Systems Architecture Design and Definition.
• System Modelling.
• Development of Engineering Management Plans (Safety Management, Test Integration & Acceptance, Technical Risk Management).
• Gathering of verification evidence for System Requirements.
• Creation of Procurement Specifications for sub-systems and components.
• Writing test specifications.
• Conducting Design reviews.
• Environmental Qualification Plans (EMC, Temperature, Shock & Vibration).

Key Skills & Experience Required for the Senior Systems Engineer:

Essential –

• A degree in Engineering or physical sciences.
• Minimum of 5 years’ systems engineering experience in a defence engineering (or similar) company.
• Proficient in the use of requirements management tools (DOORS, Visure or R4J).
• Work package management in JIRA.
• Proficient in Report Writing.

 Desirable –

• Technical Leadership of project teams with a significant level of responsibility for managing project risks and for delivering on time and on budget.
• Experience in working closely with internal and external stakeholders.
• Working in multi-disciplinary teams on projects with a high level of complexity.
• Safety Management (MIL-STD 882E, DEF-STAN 00-56, ISO 12100:2010).
• Statutory Compliance (CE Marking).
• Camera Sensor Technology (InfraRed and visible spectrum, DRI performance).
• Fault-Tree and Failure Mode Analysis.

Company Benefits:

• 37.5 hour working week and lunchtime finishes on a Friday.
• Hybrid / flexible working arrangements.
• 28 days annual leave and Christmas closure.
• Employee Help@Hand Service gives you and your family access to 4 key services including remote GP service, second opinion, mental health pathway service, and physiotherapy consultations.
• Life Assurance Policy, including Bereavement Counselling and Probate Helpline.
• Company Share Incentive Plan and Save as You Earn Scheme.
• Wellbeing initiatives, including access to the Aviva Wellbeing App and the addition of mental health support for all employees plus regular activities across our sites to support and promote well-being.
• Employee discounts scheme (including access to an additional wellbeing hub).
• Excellent Learning & Development opportunities.

If your skills and experience match this Senior Systems Engineer opportunity, we encourage you to apply by sending your CV to info@holtexecutive.com 

Holt Executive are partnered with a leading electro-optics design and manufacturing business, which is seeking a Senior Electronics Engineer to join their growing Engineering team.

The successful Senior Electronics Engineer will be responsible for proactively developing innovative electronics while providing valuable leadership to the team.

Key Responsibilities for the Senior Electronics Engineer:

• Provide expertise in circuit design, components, and PCB technology.
• Working in technology areas of EMC, Power Management, Servo Control, processor interfacing and communications.
• Provide expertise in the realms of power and signal transmission over wired medium with the ability to define and objectively review an overall architecture, including power management, system wiring and knowledge of production processes.
• Hold a pivotal role within a project and set the standards of good engineering practice, leading by example, and being seen as an expert in their given field.
• Review and analyse processes and practices within the department, driving and encouraging innovation across the board. Regularly communicate with senior management, customers and other key stakeholders maintaining a focus on tactical and some strategic oversight of projects, technology, and team development.
• Take a lead role in developing or enhancing technology within the business, providing subject matter expertise for technology areas and applying these to R&D development activities or projects.
• Technical leadership of multi-disciplined projects, with the ability to foster a culture of a systematic approach while providing our customers with solutions.
• Provide key insights into the resource planning of engineers working under them.
• Line management role to support other engineers as part of a smaller sub-team overseeing training and development needs.

Key Skills and Experience for the Senior Electronics Engineer:

Essential

• Strong degree in a related discipline accredited by the IET. Typically, 6 years of relevant experience is expected.
• Proven experience in leading and/or supervising projects or people for routine and non-routine work.
• Solid all-round theoretical and practical understanding of electrical and electronic designs
• Ability to complete analysis-based activities i.e. (circuit emulation, performance, or power budgets).
• Ability to assess and highlight key project risks, schedules, and mitigations and identify critical design activities.
• Overall awareness of the full project lifecycle ranging from opportunity/bid development through to continuing customer support.
• A proven track record of innovation-based approaches to all aspects of engineering/leadership.
• Ability to investigate and fault-find technical problems at PCB or system level, with the capability to identify root causes or procedural reforms.
• Accredited as a Chartered Engineer or working towards Chartership.
• Embedded Software Design, including ARM/KEIL.
• Experience with EMC to military standards, with the ability to manage, plan and resolve issues at an architecture and embedded level.
• Knowledge of Motors and drive technology with the ability to calculate motor performance.
• Awareness of control systems analysis and performance techniques with the ability to articulate these to fellow engineers/Stakeholders.
• Practised in the use of analysis and simulation tools such as Python, Matlab, Simulink, LT-Spice, Simetrix etc.
• Familiar with management tools such as JIRA, Confluence, MS Project.
• Practised in the use and management of PCB design tools such as Altium, Cadence OrCAD.
• Familiar with design resilience techniques such as Failure Mode Effects Analysis.
• Awareness of Lightning Direct and Indirect Effects.
• Familiar with the design of electronics within harsh environments typical with Military equipment.

Company Benefits:

• 37.5 hour working week and lunchtime finishes on a Friday.
• 28 days annual leave and Christmas closure.
• Employee Help@Hand Service gives you and your family access to four key services including remote GP service, second opinion, mental health pathway service, and physiotherapy consultations.
• Life Assurance Policy, including Bereavement Counselling and Probate Helpline.
• Company Share Incentive Plan and Save as You Earn Scheme.
• Wellbeing initiatives, including access to the Aviva Wellbeing App and the addition of mental health support for all employees plus regular activities across all sites to support and promote well-being.
• Employee discounts scheme (including access to an additional wellbeing hub).
• Excellent Learning & Development opportunities.

If your skills and experience match this Senior Electronics Engineer opportunity, we encourage you to apply by sending your CV to info@holtexecutive.com 

Join a Leading Electro-Optics Company as a Senior Mechanical Design Engineer in West Sussex

Holt Executive are partnered with a leading electro-optics design and manufacturing business, which is seeking a Senior Mechanical Design Engineer to join their skilled engineering team to collaborate on designing and building innovative systems.

Key Responsibilities for the Senior Mechanical Design Engineer:

• Innovative design skills in electro-mechanical mechanisms and precision machinery.
• Technical lead within a small, mixed-discipline, project design team to produce quality design solutions in line with cost, time, and quality requirements.
• Lead in the creation of designs in 3D CAD using SolidWorks software.
• Lead and work in collaboration with the team to perform classical engineering analysis on designs, including stress, fatigue & vibration using conventional analysis and computer simulation.
• Perform lab testing for verification and conformance of design outputs to meet the design inputs.
• Be responsible for leading and developing engineering reports to support new product designs, failure investigation and any other formal documentation to support customer requirements.
• Coordinate with wider engineering teams to integrate electronic, control and drive systems into equipment designs.
• Provide support for the production, test, and field engineering teams. Support the sales teams with bids and quotations.
• Work with project managers and sales teams to provide time estimates for design activities and keep appraised of progress.
• Support and assist the Sales Team in producing proposals and quotations/sales literature.
• Take the lead with responsibility for the timely delivery of outputs within defined deadlines.

Key Skills and Experience for the Senior Mechanical Design Engineer:

Essential

• Experience in the design of complex mechanisms and structures.
• Proven experience in the design of systems from original concept design, produced from a specification, through to production in a lead role.
• Ability to analyse the loads on, and design solutions for drive mechanisms and motor systems.
• Understand the application of machining, casting, fabrication, and moulding techniques.
• Have experience in the use of a 3D CAD system (ideally SolidWorks).
• Strong understanding of the technical work being conducted and related activities.
• Ability to lead the technical activities of a project design team, controlling workload and design output.

Desirable 

• Experience in designing for use in harsh environments.
• Experience working in the Defence or related sectors, particularly in R&D and manufacturing, such as scientific equipment manufacturers, special purpose machine builders or high-end customisation companies.
• Experience and knowledge of coaching in support of talent development within the team.
• Previous experience in a similar level position in a ‘Senior’ level role, preferably in a small or medium-sized company and/or relevant business model.

Company Benefits:

• 37.5 hour working week and lunchtime finishes on a Friday.
• 28 days annual leave and Christmas closure.
• Employee Help@Hand Service gives you and your family access to 4 key services including remote GP service, second opinion, mental health pathway service, and physiotherapy consultations.
• Life Assurance Policy, including Bereavement Counselling and Probate Helpline.
• Company Share Incentive Plan and Save as You Earn Scheme.
• Wellbeing initiatives, including access to the Aviva Wellbeing App and the addition of mental health support for all employees plus regular activities across all sites to support and promote well-being.
• Employee discounts scheme (including access to an additional wellbeing hub).
• Excellent Learning & Development opportunities.

If your skills and experience match this Senior Mechanical Design Engineer opportunity, we encourage you to apply by sending your CV to info@holtexecutive.com

Join a Leading Electro-Optics Company as a Mechanical Design Engineer in West Sussex

Holt Executive are partnered with a leading electro-optics design and manufacturing business, which is seeking a Mechanical Design Engineer to join their skilled engineering team to collaborate on designing and building innovative systems.

Key Responsibilities for the Mechanical Design Engineer:

• Work with the team to perform classical engineering analysis on designs including stress, fatigue & vibration using conventional analysis and computer simulation.
• Produce detailed engineering and assembly drawings for manufacturing and perform lab testing for verification and conformance of design outputs to meet the design inputs.
• Assist with developing engineering reports to support new product designs, failure investigation and any other formal documentation to support customer requirements.
• Liaise with wider engineering teams to integrate electronic, control and drive systems into equipment designs.
• Have experience of working within a closely integrated, mixed-discipline, project design team to produce quality design solutions in line with cost, time, and quality requirements.
• Provide support for the production, test, and field engineering teams. Support the sales teams with bids and quotations.
• Assist with creating designs in 3D CAD using SolidWorks software.

Key Skills and Experience for the Mechanical Design Engineer:

Essential

• Have more than 2 years of experience working in an engineering role.
• Have experience in the design of complex mechanisms and structures for use in harsh environments – preferably in the defence industry.
• Have proven experience in the design of systems from original concept design, produced from a specification, through to production.
• Can analyse the loads on, and design solutions for, items such as gear drives bearings and motors.
• Be able to demonstrate an understanding of the application of machining, casting, fabrication, and moulding techniques.  Have experience in the use of the SolidWorks CAD system.
• Ability to consult with customers verbally and in writing effectively, producing reports and participating in formal design reviews.

Desirable 

• Have experience designing equipment for use in harsh environments.
• Experience working in the Defence or related sectors, particularly in R&D and manufacturing, such as scientific equipment manufacturers, special purpose machine builders or high-end customisation companies.
• Have more than 5 years of experience working in an engineering role.

 Company Benefits:

• 37.5 hour working week and lunchtime finishes on a Friday.
• 28 days annual leave and Christmas closure.
• Employee Help@Hand Service gives you and your family access to 4 key services including remote GP service, second opinion, mental health pathway service, and physiotherapy consultations.
• Life Assurance Policy, including Bereavement Counselling and Probate Helpline.
• Company Share Incentive Plan and Save as You Earn Scheme.
• Wellbeing initiatives, including access to the Aviva Wellbeing App and the addition of mental health support for all employees plus regular activities across all sites to support and promote well-being.
• Employee discounts scheme (including access to an additional wellbeing hub).
• Excellent Learning & Development opportunities.

If your skills and experience match this Mechanical Design Engineer opportunity, we encourage you to apply by sending your CV to info@holtexecutive.com 

Do you thrive in a fast-paced environment where you keep production running smoothly?

If so, then this Production Controller role is perfect for you!

Holt Executive are partnered with a leading electro-optics design and manufacturing business, who are seeking a Production Controller to join their team in West Sussex.

The Production Controller will be responsible for the entire production process ensuring everything runs efficiently and on time. You’ll translate sales orders into clear production requirements, working closely with the supply chain team to source materials and meet customer deadlines.

Key Responsibilities for the Production Controller:

• Analyse sales order details to generate clear production requirements and comprehensive planning schedules.
• Determine purchasing and production needs to meet deadlines and budget constraints for each project.
• Plan overall production requirements for multiple projects while ensuring efficiency.
• Organising kitting for shop-built assemblies ensuring kits are in a suitable state for manufacture.
• Collaborate with the supply chain team to secure necessary components for production.
• Track purchase progress and ensure timely acquisition of materials.
• Organising delivery documentation ensuring all customer order requirements are met.
• Liaise with production and engineering teams to address manufacturing procedures and troubleshoot issues.
• Assist with the planning of the internal Machine Shop.
• Prepare cost-to-date and cost-to-complete reports for accurate project budgeting.
• Assist with the generation of new procedure, methods, and flow diagrams for the MRP system.
• Ensure that all documentation adheres to BS EN9001 quality standards.

Key Skills and Experience for the Production Controller:

Essential

• Ability to read manufacturing drawings is required.
• Experienced in the use of ERP/MRP systems.

 Desirable 

• Ideally HNC qualified or equivalent in Engineering, Manufacturing or Production.
• Previous experience of production control in a highly regulated environment with electro-mechanical equipment is highly desirable.
• A background in an engineered to order/build to order production environment is desirable.

 Company Benefits:

• 37.5 hour working week and lunchtime finishes on a Friday.
• 28 days annual leave.
• Christmas closure.
• Employee Help@Hand Service gives you and your family access to 4 key services including remote GP service, second opinion, mental health pathway service, and physiotherapy consultations.
• Life Assurance Policy, including Bereavement Counselling and Probate Helpline.
• Company Share Incentive Plan and Save as You Earn Scheme.
• Wellbeing initiatives, including access to the Aviva Wellbeing App and the addition of mental health support for all employees plus regular activities across all sites to support and promote well-being.
• Employee discounts scheme (including access to an additional wellbeing hub).
• Excellent Learning & Development opportunities.

If your skills and experience match this Production Controller opportunity, we encourage you to apply by sending your CV to info@holtexecutive.com