Job Description:

Senior Systems Engineer

Location: Long Beach, California, USA
Salary: $110,000 - $175,000 per annum + benefits
Sector: Space Systems / Aerospace Engineering
Security Requirement: U.S. Citizenship Required

Alexander Associates are partnering with an innovative space technology organisation seeking a Senior Systems Engineer to join their growing Space Systems team in Long Beach, California.

This is an exciting opportunity to work on cutting-edge spacecraft and satellite programmes supporting civil, commercial, and defence customers. The successful candidate will play a key role in the development and execution of complex space missions, leading systems engineering activities from concept through testing and delivery.

Key Responsibilities

• Develop and maintain technical performance budgets for spacecraft and vehicle systems
• Define, manage, and verify system requirements throughout the programme lifecycle
• Conduct simulations, modelling, and analysis across spacecraft functions
• Develop test methodologies and analyse system performance data
• Lead the technical development of spacecraft missions and system architectures
• Support programme management and product development activities
• Produce interface specifications, CONOPS documentation, and technical design documentation
• Collaborate closely with multidisciplinary engineering teams to deliver mission objectives
• Support systems integration, validation, and verification activities

Essential Requirements

• Bachelor's degree in Aerospace Engineering, Mechanical Engineering, Electrical Engineering, Software Engineering, Computer Engineering, or a related discipline
• Minimum 8 years of aerospace engineering experience
• Experience supporting satellite or spacecraft development programmes
• U.S. Citizenship due to programme requirements

Desirable Experience

• Master's degree or PhD in a relevant engineering discipline
• Active TS/SCI Security Clearance
• Knowledge of spacecraft subsystems including:
• Attitude Determination and Control Systems (ADCS)
• Electrical Power Systems (EPS)
• Command & Data Handling (C&DH)
• Space-to-ground communications
• Thermal control systems
• Understanding of orbital mechanics, rigid body dynamics, and the space environment
• Experience using MATLAB, Python, and STK
• Familiarity with requirements management tools such as DOORS or JAMA
• Satellite operations experience
• Experience with environmental and qualification testing, including:
• Thermal vacuum testing
• Random vibration testing
• Hardware-in-the-loop (HITL) testing
• Strong problem-solving and stakeholder management skills
• Ability to thrive in a fast-paced engineering environment with competing priorities

What's on Offer

• Competitive salary of $110,000 - $175,000
• Comprehensive healthcare, dental, and vision coverage
• Retirement savings plan with company contribution
• Generous holiday allowance and paid leave
• Parental leave and life insurance benefits
• Employee stock purchase opportunities
• On-site facilities and additional employee perks
• Opportunity to contribute to industry-leading spacecraft and satellite programmes

If you are passionate about space systems engineering and want to work on mission-critical aerospace projects, we would love to hear from you.