Subsystem Assembly Technician – Satellite

  • Athens, Greece
  • Greek
  • Space
  • 3 years of experience
  • To be negotiated

We are seeking a Subsystem Assembly Technician to ensure every mechanical subsystem delivered for satellite integration works exactly as intended by inspecting, assembling and validating it with clear, reliable evidence. It also exists to catch issues early, fix them at the source and keep the entire build process traceable and unblocked so spacecraft can be assembled and launched with confidence.

We are hiring on behalf of an international leader in satellite-based Earth Observation and advanced satellite imagery technology, employing more than 500 people. The company operates commercial satellite constellations and delivers critical insights to clients across sectors such as defense, intelligence, maritime, insurance, disaster management, and finance.

Their mission is to improve life on Earth by providing reliable, data-driven insights — even in the most challenging conditions, such as at night or through cloud cover. The team is composed of experts in engineering, data science, and software development, united by curiosity, teamwork, and a shared passion for innovation.

Why joining them ?

You’ll be part of a pioneering organization shaping the future of the space industry, working with cutting-edge satellite imagery technology and a talented, international team. The company values innovation, collaboration, and continuous professional growth — offering opportunities for training, development, and global impact.

Outcomes & Responsibilities

  • Perform inspection, assembly and verification of satellite subsystems
  • Ensure readiness and functionality of assigned subsystems (e.g., antennas, solar panels) through testing and validation procedures
  • Collaborate closely with Engineering, AIT, and Quality teams to resolve integration challenges and drive design-for-manufacturing improvements
  • Monitor subassembly production and escalate blockers early, ensuring smooth coordination with AIT and supply chain teams
  • Support root cause analysis and non-conformance resolution for mechanical-related issues during integration and testing
  • Ensure proper documentation and traceability for all mechanical activities in accordance with aerospace production standards

Requirements

Role-specific Requirements & Competencies

  • Bachelor’s degree in Mechanical Engineering, Aerospace Engineering, or a related technical field
  • 1+ years of hands-on experience in aerospace or high-reliability mechanical assembly environments
  • Proven experience assembling/inspecting/verifying electronic components
  • Familiarity with quality standards
  • Comfortable working in a fast-paced, scaling production environment with tight deadlines
  • Hands-on mindset — must be willing to go on the floor, solve problems, and support othertechnicians directly
  • Excellent communication skills and ability to coordinate across functions (Production, Engineering, QA, Planning)
  • Strong process ownership and commitment to continuous improvement
  • Experience with root cause analysis and non-conformance handling

Advantageous Competencies To Have

  • Strong understanding of satellite mechanical subsystems, including deployables, structures, and environmental testing (vibration, shock, thermal vacuum)
  • Thorough understanding of thermal behavior and thermal interfaces, including thermal pads, thermal pastes, and other thermal dissipation hardware, is essential
  • Familiarity with IPC, ECSS, or similar aerospace manufacturing and quality standards
  • Experience in NewSpace or small satellite production
  • Knowledge of mechanical testing standards and processes in the space industry
  • Experience working with cleanroom procedures and satellite integration flows
  • Familiarity with ERP or MES systems used in production environments

Key Competences

In addition to the requirements above, we evaluate candidates on these key qualities throughout the hiring process:

  • Intellectual Firepower: Rapidly comprehends, structures and synthesizes complex information, draws accurate conclusions, and communicates them with clarity.
  • Passion & Work Ethic: Brings sustained motivation, resilience, and high personal standards to every challenge.
  • Ownership & Action: Assumes full accountability for outcomes, acting decisively, and ensuring commitments are delivered.
  • Team Player: Works collaboratively across teams, contributing to shared success, and engaging in constructive debate.
  • Integrity & Growth Mindset: Operates with transpare

What we offer

  • A meaningful role in a pioneering space technology company with a mission-driven culture.
  • An independent position with both local ownership and global collaboration.
  • Occupational healthcare and accident insurance.
  • Annual benefit budget for wellness, commuting, or leisure activities.
  • Modern equipment and phone subscription.
  • Relocation and travel support, as required.
  • Opportunities for training, professional development, and conference participation.
  • Inspiring offices and focused workspaces designed to help you excel.

For more than ten years, I’ve been driven by one idea — the future of Space and Defense depends on the people behind it. My career began in technical recruitment, where I had the privilege to hire engineers designing cutting-edge systems for aerospace and advanced manufacturing.

Co-founding Demexios was a natural next step: a way to transform my industry knowledge and relationships into a dedicated structure that helps clients recruit faster, smarter, and with strategic alignment.
Over time, I built long-term partnerships with companies leading technological sovereignty — from NewSpace startups developing electric propulsion to defense integrators modernizing tactical and surveillance systems. These collaborations allowed me to form a powerful network of decision-makers, project leaders, and experts who now trust Demexios to deliver when precision truly matters.
Today, my role is not just to connect candidates and companies — it’s to ensure that every hire strengthens our clients projects.

I’ve built my career in sales and recruitment across several industries space, tech, healthcare, and defense. I’ve always been drawn to innovation and the talented people who turn ideas into reality. Over the years, I’ve learned how much a motivated and skilled team can define a company’s success and how the right people will shape the future of the New Space and defense industries.

My international background has allowed me to work with both startups and global organizations, helping them identify individuals who truly fit their culture and business goals. This combination of experience in technology and talent acquisition naturally led to the creation of Demexios.

At Demexios, our mission is simple: to connect experts with the companies that need their skills particularly in the defense and space sectors. I firmly believe that no ambitious project can succeed without a skilled and cohesive team driving it forward.

My commitment is to be a trusted partner for our clients, supporting them step by step in building strong, high-performing teams that deliver tangible results whether their ambitions lie on Earth or beyond.