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About the Role Holt Executive is seeking a Spacecraft Systems Engineer with expertise in Systems Analysis to join a pioneering space technology team based in Harwell. This is an exciting opportunity to be at the forefront of innovative missions, working on the design, analysis, and development of advanced spacecraft systems. You will play a pivotal role in shaping mission architecture, driving system-level design, and providing technical leadership throughout the entire project lifecycle—from initial concept through launch and in-orbit operations.

Key Responsibilities

• Lead system-level trade studies and analyses to optimize spacecraft architecture and mission performance.
• Develop and maintain system budgets (mass, power, data) and requirements documentation.
• Prepare and review subsystem requirements to support procurement and integration.
• Adapt and refine system designs in response to mission evolution, collaborating closely with subsystem leads and external partners.
• Conduct Failure Detection, Isolation, and Recovery (FDIR) reviews and Failure Mode and Effects Analysis (FMEA).
• Produce and maintain key system documents, including CONOPS, V&V plans, and system test plans.
• Present technical findings to internal and external stakeholders, supporting bids and early-stage mission development.
• Support Assembly, Integration, and Test (AIT) activities, launch campaigns, and in-orbit commissioning.
• Provide technical support to operations teams during critical mission phases.

Skills & Experience Required

• Degree in Aerospace Engineering or a related STEM field; advanced degree desirable.
• Demonstrable experience in spacecraft systems engineering, ideally across the full mission lifecycle.
• Strong analytical skills and experience with systems engineering methodologies (requirements analysis, verification, and validation).
• Proficiency with simulation and modeling tools (e.g., MATLAB, Python, STK) and requirements management platforms (e.g., JAMA, DOORS).
• Experience working in multidisciplinary teams and with external partners.
• Excellent communication and technical documentation skills.
• Ability to thrive in a fast-paced, dynamic environment and manage multiple priorities.

Why Join?

• Be part of a collaborative, diverse, and forward-thinking team working on groundbreaking space missions.
• Influence mission-critical decisions and see your work delivered from concept to orbit.
• Competitive salary, benefits, and opportunities for professional growth in a thriving sector.

How to Apply If you are passionate about space systems engineering and want to make a real impact on the future of space technology, apply now to join Holt Executive’s client in Harwell.

Please note: This position is offered by Holt Executive on behalf of a leading space industry client. Further details will be provided during the recruitment process.

Holt Executive are partnered with a Satellite and Space leader that provides reliable and secure satellite-delivered voice and high-speed data communications solutions to broadcast, telecommunications, corporate and government customers worldwide. They are now developing a LEO constellation that will revolutionize global broadband connectivity for enterprise.

Our partner is seeking a User Terminal Architect to play a vital role in in the design and development of next-generation satellite user terminals.

Key Responsibilities for the User Terminal Architect:

• Support the design, development, and optimization of Modem architectures.
• Drive trade-space discussions.
• Collaborate with cross-functional engineering teams to ensure that integration of the modem with other terminal components is seamless.
• Developing and implementing signal processing algorithms.
• Performance analysis, and test reviews of modem designs, including link budget analysis.
• Ensure compliance is met with relevant industry standards.
• Lead the development and testing of prototypes.
• Work with third-party vendors, manufacturers, and a cross-functional engineering and product team to ensure cohesion with the system design.

Key Skills & Experience for the User Terminal Architect: 

• A Bachelor’s or Master’s degree in Electrical Engineering, Telecommunications, Computer Science, or a related field.
• 6+ years of experience in satellite communication systems, modem design, and ideally FPGA design and signal processing.
• Strong knowledge of digital communication systems, including modulation techniques, error correction methods, and RF systems.
• Proficiency with design and simulation tools such as MATLAB, Simulink, or similar. Experience with DSP programming is a plus.
• Experience with making trade-offs between performance and cost at the component and the system level.
• Experience with the full lifecycle of hardware and modem designs – from inception, design, production, and fielding.

 
The successful candidate must be able to work in the United States and obtain relevant clearances.

This opportunity offers a hybrid work model with 4 days in the office per week and occasional travel is anticipated.
 
If your skills and experience match this User Terminal Architect opportunity, we encourage you to apply now!

Holt Executive are partnered with a leading Global Satellite and Space leader that provides reliable and secure satellite-delivered voice and high-speed data communications solutions to broadcast, telecommunications, corporate and government customers worldwide. They are now developing a LEO constellation that will revolutionize global broadband connectivity for enterprise.
 
They require a Senior Systems Engineering Specialist – Communication Systems to play a crucial role in developing a revolutionary end-to-end satellite communication system. You’ll collaborate with experts across disciplines to design and define their system’s architecture.
 
Key Responsibilities for the Senior Systems Engineering Specialist – Communication Systems:

• Collaborate with cross-functional teams to define system architecture, system requirements, and network element specifications.
• Craft key aspects of the system, including communication protocols, resource allocation mechanisms, network entry mechanisms, management systems, and more.
• Lead and guide junior engineers, fostering their growth and expertise.
• Document the system architecture comprehensively for optimal performance and reliability.
• Collaborate with the System Integration and Test team for seamless integration of all system elements.
• Identify and manage technical risks related to the system design and develop mitigation strategies to stay ahead of industry trends.
• Contribute innovative ideas and collaborate with external partners for project success.

Key Education & Experience for the Senior Systems Engineering Specialist – Communication Systems: 

• Bachelor’s, Master’s, or Ph.D. degree in Electrical Engineering, Aerospace Engineering, or a related field.
• Proven experience in satellite system architecture and design.
• Strong experience in Payload technology, and Radio Frequency (RF) engineering.
• Strong knowledge of satellite communication protocols, orbital mechanics, and space systems. Ideally with experience in software-defined satellite communication payloads.
• Familiarity with regulatory bodies and space industry standards.
• Must be a US or Canadian Citizen.

The successful candidate must be able to work in Canada and obtain Reliability Clearance.

This opportunity offers a hybrid work model with 4 days in the office per week and occasional travel is anticipated.
 
If your skills and experience match this Senior Systems Engineering Specialist – Communication Systems opportunity, we encourage you to apply now!

Join a dynamic team at the forefront of aerospace innovation as an Embedded Software Engineer. You will develop real-time embedded software for spacecraft onboard systems, contributing to exciting space missions and shaping the future of space exploration.

This role offers the chance to work on advanced flight software, collaborating with cross-functional teams to design, validate, and integrate critical systems. You’ll be responsible for defining software requirements, testing in both simulation and real-world environments, and ensuring high-performance software solutions.
 
Key Responsibilities:

• Develop and test flight software for spacecraft.
• Work with multiple teams to identify software needs and solutions.
• Participate in mission system testing and simulation.
• Contribute to the overall success of space missions through software design and integration.

 
What We’re Looking For:

• Strong experience in C/C++ for real-time embedded systems.
• Familiarity with real-time operating systems (VxWorks, RTEMS).
• Proven ability to work with version control systems like Git.
• Experience with developing equipment drivers and interface documentation.
• Ability to independently test and debug software in both simulated and live environments.
• Strong problem-solving skills, and proactive, self-driven work ethic.

 
Desirable Experience:

• Experience with space-related software development.
• Knowledge of industry standards like MISRA, CCSDS, or ECSS.
• Familiarity with Linux systems and Python.

 
What You’ll Get:

• Competitive salary and benefits.
• Flexible and hybrid working options and a supportive environment.
• 9/75 work pattern (optional).
• 25 days holiday (increasing with service), life insurance, and private healthcare.
• Relocation support if required.
• Work with a talented, international team in state-of-the-art facilities.

 
Ready to take your career to new heights? Apply now and be part of groundbreaking space technology!

Join a dynamic team at the forefront of aerospace innovation as an Embedded Software Engineer. You will develop real-time embedded software for spacecraft onboard systems, contributing to exciting space missions and shaping the future of space exploration.

This role offers the chance to work on advanced flight software, collaborating with cross-functional teams to design, validate, and integrate critical systems. You’ll be responsible for defining software requirements, testing in both simulation and real-world environments, and ensuring high-performance software solutions.
 
Key Responsibilities:

• Develop and test flight software for spacecraft.
• Work with multiple teams to identify software needs and solutions.
• Participate in mission system testing and simulation.
• Contribute to the overall success of space missions through software design and integration.

 
What We’re Looking For:

• Strong experience in C/C++ for real-time embedded systems.
• Familiarity with real-time operating systems (VxWorks, RTEMS).
• Proven ability to work with version control systems like Git.
• Experience with developing equipment drivers and interface documentation.
• Ability to independently test and debug software in both simulated and live environments.
• Strong problem-solving skills, and proactive, self-driven work ethic.

 
Desirable Experience:

• Experience with space-related software development.
• Knowledge of industry standards like MISRA, CCSDS, or ECSS.
• Familiarity with Linux systems and Python.

 
What You’ll Get:

• Competitive salary and benefits.
• Flexible and hybrid working options and a supportive environment.
• 9/75 work pattern (optional).
• 25 days holiday (increasing with service), life insurance, and private healthcare.
• Relocation support and visa sponsorship.
• Work with a talented, international team in state-of-the-art facilities.

 
Ready to take your career to new heights? Apply now and be part of groundbreaking space technology!

Holt Executive is proud to be recruiting on behalf of a pioneering space organisation focused on sustainable satellite operations and in-orbit servicing. We are seeking an experienced and driven Payload Systems Engineer to join their growing engineering team in Harwell, UK.

This is an exciting opportunity to work on innovative missions, contributing to the development, integration, and testing of advanced payloads, including cutting-edge technologies like optical sensors, RF systems, and onboard processing units.

Key Responsibilities:

• Define and manage payload system requirements, interfaces, and performance budgets.
• Work closely with multidisciplinary teams to design and develop payload architectures for satellite missions.
• Lead technical trade-offs, analyses, and feasibility studies for payload components and subsystems.
• Oversee integration, verification, and validation of payload hardware and software.
• Collaborate with external suppliers and partners to manage the development and delivery of payload elements.
• Support mission operations teams in preparing for in-orbit commissioning and performance monitoring.

Requirements:

• Bachelor’s or Master’s degree in Aerospace Engineering, Electrical Engineering, Physics, or related discipline.
• Solid experience working on space payload systems, preferably in LEO or GEO missions.
• Strong understanding of electro-optical, RF, or onboard data processing payloads.
• Familiarity with payload interface design, testing, and qualification processes.
• Experience collaborating with hardware and software teams across system-level development cycles.
• Ability to work independently and within a collaborative, cross-functional environment.

Desirable Skills:

• Knowledge of in-orbit servicing, rendezvous and proximity operations (RPO), or satellite inspection missions.
• Experience with tools like MATLAB, STK, or simulation/modeling software.
• Exposure to ECSS or NASA standards for spacecraft systems.
• Previous involvement in mission design, AIT, or payload commissioning.

What’s on Offer:

• Work on meaningful, high-impact missions that support the future of space sustainability.
• Competitive salary and comprehensive benefits package.
• Collaborate with a highly skilled, international team on next-gen space systems.
• Hybrid working model and flexible hours.
• Excellent opportunities for professional development and career growth.

If you’re passionate about solving complex space challenges and building systems that make a difference, this is the opportunity for you. Apply today or reach out to Holt Executive for more details.

IT Infrastructure Architect

Holt Executive are partnered with a global Satellite and Space leader that provides reliable and secure satellite-delivered voice and high-speed data communications solutions to broadcast, telecommunications, corporate and government customers worldwide. They are now developing a LEO constellation that will revolutionize global broadband connectivity for enterprise.

Our partner is seeking an IT Infrastructure Architect to oversee the architecture and design of essential IT infrastructure for the constellation, including cloud and data centres. This position will include deliverables, documentation, strategy, and the final design, working cross-functionally across Network and Cloud Engineering.

Key Responsibilities for the IT Infrastructure Architect:

• Define and maintain hardware standards, preferred vendors, and support models across multiple data center environments.
• Participate in project and stakeholder meetings as needed.
• Collaborate with stakeholders to determine resource requirements, project future capacity needs, and provide cost estimations.
• Support data center engineering efforts with rack layout planning, as well as cooling and power modeling.
• Work with architecture teams to design infrastructure solutions that align with established requirements, emphasizing availability and security.
• Create documentation outlining the hardware architecture and supporting infrastructure services, including automation related to Infrastructure as Code (IaC).
• Contribute to the creation of infrastructure build guides and reference materials for the IT Infrastructure.

Key Skills & Experience for the IT Infrastructure Architect:

• A degree in Computer Science, or relevant equivalent experience.
• Over 7 years of hands-on experience with installing, configuring, and operating data center environments, encompassing servers, storage systems, and networking components.
• More than 5 years of experience in building secure, on-premises data center hardware clusters, including network, server, and storage infrastructure.
• At least 5 years of experience in designing, implementing, and managing enterprise-grade networks, including switches, firewalls, and associated monitoring tools.
• Demonstrated expertise in deploying and maintaining cloud-based infrastructure solutions.
• Solid experience working with virtualization platforms such as VMware and KVM.
• Extensive experience in designing, deploying, and maintaining large-scale, highly available, and fault-tolerant network infrastructures.
• Proficient in managing and operating various Linux distributions, including RedHat and Ubuntu, as part of day-to-day operations.
• Deep understanding and hands-on experience with a range of storage platforms and technologies, including related network protocols such as iSCSI and NFS.
• Skilled in implementing and managing dedicated infrastructure services, including DNS and NTP, in secure and isolated environments.
• Strong familiarity with cloud infrastructure solutions, including vendor-specific services and technologies.
• Well-versed in identity and access management (IAM) principles, strategies, and tooling.
• Experienced in using scripting and automation tools such as Bash, Python, Terraform, and Ansible to provision and manage infrastructure.
• Background in designing data center management platforms, including DCIM systems, as well as monitoring and alerting solutions.
• Working knowledge of Kubernetes deployments is a valuable asset.
• Understanding of Site Reliability Engineering (SRE) principles is considered beneficial.

The successful candidate must be able to work in Canada and be able to obtain a Canadian Controlled Goods Program (CGP) Clearance.

This opportunity requires 4 days in the office per week and travel is anticipated.

If your skills and experience match this IT Infrastructure Architect opportunity, we encourage you to apply now!

Mission Assurance Engineer

Holt Executive are partnered with a global Satellite and Space leader that provides reliable and secure satellite-delivered voice and high-speed data communications solutions to broadcast, telecommunications, corporate and government customers worldwide. They are now developing a LEO constellation that will revolutionize global broadband connectivity for enterprise.

Our partner is seeking a Senior Mission Assurance Engineer to play a vital role in the development and deployment of mission assurance processes through the entire lifecycle of the program.

Key Responsibilities for the Senior Mission Assurance Engineer:

• Be the main point of contact for the different program segments on mission assurance activities and deliverables.
• Reviewing and approvals of quality plans ensuring they meet contractual requirements.
• Attend and participate in design and manufacturing review meetings, ensuring that quality requirements are being met – covering design, manufacturing, inspection, test, and integration of products and software.
• Oversight of engineering documentation to set quality requirements.
• Non-conformance reviews.
• Responsible for corrective action, and preventative action processes.
• Perform audits, inspections, and assessments internally, and for suppliers.

Key Skills & Experience for the Senior Mission Assurance Engineer:

• A degree in Engineering, Science, or a related field.
• 8+ years of experience within mission assurance, or quality engineering, ideally in the satellite or telecommunications industry.
• Proven experience in failure and anomaly investigation, corrective and preventative action.
• Proven experience in process improvement and implementation.
• Proven experience in undertaking internal and supplier audits and inspections.
• Experience and the ability to assess technical statuses, and issues within hardware, software, and operations.
• Excellent communication skills.

The successful candidate must be able to work in Canada and be able to obtain a Reliability Clearance.
 
This opportunity offers a hybrid work model with 4 days in the office per week and occasional travel is anticipated.
 
If your skills and experience match this Senior Mission Assurance Engineer opportunity, we encourage you to apply now!

Are you a driven and dynamic sales professional looking to break into the exciting world of space technology? We are seeking a Junior Sales Representative to join our growing team in Florida. This is an excellent opportunity to develop your career in a cutting-edge industry, working with high-tech solutions that are shaping the future of Earth observation and satellite technology.

Key Responsibilities:

• Identify and engage potential clients, developing strong relationships in the aerospace and defense sectors.
• Support the sales team in managing leads, preparing proposals, and negotiating contracts.
• Collaborate with marketing and technical teams to understand customer needs and promote innovative solutions.
• Maintain CRM records and track sales performance against targets.
• Represent the company at industry events, conferences, and client meetings.

What We’re Looking For:

• 1+ years of experience in sales or business development, preferably in a technical or B2B environment.
• Strong communication and negotiation skills, with a proactive approach to client engagement.
• Passion for technology, aerospace, or defense sectors (experience in these fields is a plus!).
• Ability to work independently and thrive in a fast-paced, growth-driven environment.
• Bachelor’s degree in business, engineering, or a related field preferred.

Why Join Us?

• Be part of an innovative, international team at the forefront of space technology.
• Excellent career growth opportunities in a rapidly expanding sector.
• Florida-based role with the chance to work on global projects.
• Work with cutting-edge solutions in Earth observation, satellite imaging, and aerospace applications.

If you’re a motivated sales professional eager to launch your career in the space industry, we’d love to hear from you! Apply today and become part of something out of this world.

Holt Executive are partnered with a US based new space company who in a joint venture with their European counterparts, are looking to enter the satellite manufacturing business.

Officially founded in 2024, this venture is a significant milestone in the group’s strategic expansion. Backed by over 170m Dollars raised in 2024, this venture is poised to launch their first satellites in 2025.

We have an exciting opportunity for a Payload Systems Engineer with vast experience in Communication/RF Payloads to play a crucial role in managing and optimizing satellite payload communication systems.
 
Key Skills & Experience Required by the Payload Systems Engineer: 

• Vast experience and knowledge in satellite communication systems, radio frequency engineering, and signal processing.
• Experience and knowledge with payload communication protocols, data links, and modulation schemes.
• An understanding of satellite communication standards such as CCSDS.
• Strong understanding of antenna systems, frequency bands, and propagation models.
• Experience and expertise in software-defined radios (SDR) and networking protocols.
• A Bachelor’s degree in Electrical Engineering, Telecommunications, or a related field.
• Excellent problem-solving and analytical skills.
• Ability to work effectively in a team and communicate technical concepts clearly.
• US Citizenship.

This opportunity is a hybrid position, based in Boulder, Colorado. You must be located in or around the Boulder, CO area.
 
If your skills and experience match this Payload Systems Engineer opportunity, we encourage you to apply by sending your CV now!