Alexander Associates

Senior Propulsion Systems Engineer Location: Long Beach, California (On-Site) Job Type: Full-Time Salary Range: $115,000 - $176,000 per year (DOE) About the Opportunity Alexander Associates is recruiting on behalf of a leading aerospace and space technology organization seeking a Senior Propulsion Systems Engineer to join their propulsion engineering team based in Long Beach, California. This role offers the opportunity to work on cutting-edge propulsion and fluid systems supporting advanced space programs for commercial, civil, and defense customers. The successful candidate will take ownership of propulsion system development from concept through qualification and production, contributing to some of the industry's most innovative spacecraft and launch vehicle programs. Candidates may be considered at either the Senior Propulsion Systems Engineer I or Senior Propulsion Systems Engineer II level, depending on experience. Key Responsibilities Lead the development of new and existing propulsion systems and products from concept through deployment. Perform propulsion system performance calculations, modelling, analysis, and detailed system design activities. Define, manage, and maintain technical requirements throughout the product lifecycle. Lead systems engineering activities and provide technical direction across multidisciplinary teams. Plan, execute, and analyse development and qualification testing activities. Develop test plans, instrumentation strategies, data acquisition methods, and post-test analysis reports. Communicate technical progress, risks, and solutions to internal and external stakeholders. Apply sound engineering judgement and risk-based decision-making to complex technical challenges. Support project planning, scheduling, resource allocation, and programme execution. Mentor junior engineers and contribute to the professional development of team members. Drive engineering best practices, documentation standards, and continuous improvement initiatives. Required Qualifications Senior Propulsion Systems Engineer I Bachelor's degree in Aerospace Engineering, Mechanical Engineering, Mechatronics, or a related engineering discipline. Minimum 5 years of experience in propulsion system development or a similarly demanding engineering environment. Strong expertise in propulsion system modelling, static and transient analysis, and model validation Equivalent modelling software Experience supporting full product development lifecycles, including requirements definition, detailed design, qualification, production, and acceptance testing. Strong understanding of systems engineering methodologies and risk-based engineering processes. Demonstrated hands-on engineering experience. Experience working with propulsion systems utilizing chemical and/or electric propulsion technologies. U.S. Citizenship required with the ability to obtain a U.S. Security Clearance. Required Qualifications Senior Propulsion Systems Engineer II Bachelor's degree in Aerospace Engineering, Mechanical Engineering, Mechatronics, or a related engineering discipline. Minimum 8 years of experience in propulsion system development or a similarly demanding engineering environment. Advanced expertise in propulsion system modelling, analysis, testing, and validation. Proven experience leading engineering programmes through complete development lifecycles. Strong systems engineering and technical leadership capabilities. Demonstrated hands-on engineering and problem-solving experience. Experience with both chemical and electric propulsion systems preferred. U.S. Citizenship required with the ability to obtain a U.S. Security Clearance. Preferred Qualifications Master's Degree or PhD in Aerospace Engineering, Mechanical Engineering, or related discipline. Experience with requirements management tools such as Jama. Programming skills in Python for data analysis, automation, and post-processing activities. Mechanical design experience using NX or equivalent CAD software. Working knowledge of GD&T and engineering drawing standards. Experience with National Instruments data acquisition systems. Experience testing, troubleshooting, and supporting flight hardware. Strong project planning and technical leadership skills. Excellent communication and stakeholder management abilities. What We're Looking For A genuine passion for engineering and space technology. Strong analytical and problem-solving skills. Ability to thrive in fast-paced, technically challenging environments. Comfortable making informed decisions in situations with limited information. Strong organisational skills with the ability to manage multiple priorities. Collaborative mindset and commitment to continuous improvement. Desire to mentor others and contribute to team success. If you are passionate about propulsion technology and want to help develop the next generation of space systems, we encourage you to apply.

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.

RF Systems Engineer Location: Long Beach, California, USA Salary: $85,000 - $125,000 per annum + benefits Security Requirement: Ability to Obtain TS/SCI Clearance Alexander Associates are working with a leading space technology organisation seeking an RF Systems Engineer to join their growing engineering team in Long Beach, California. This is an exciting opportunity for an engineer with a passion for RF communications, satellite systems, and advanced aerospace technologies. The successful candidate will support the development, integration, and testing of next-generation communication systems for a range of commercial, civil, and defence space programmes. Key Responsibilities System Development Define and maintain system and product requirements specifications Support the design and development of RF communication systems from concept through production Ensure technical solutions align with programme requirements and performance objectives Develop and execute test plans, procedures, and validation activities Support the design and development of ground support equipment (GSE) and production automation solutions Produce and maintain technical documentation including Interface Control Documents (ICDs) and user manuals Programme & Customer Support Review customer requirements and technical proposals to assess compliance and development requirements Support engineering reviews including PDRs, CDRs, and TRRs Provide technical support and troubleshooting for internal and external stakeholders Drive development activities required to meet new customer and programme requirements Maintain awareness of product development schedules to ensure programme success and customer satisfaction Essential Requirements Bachelor's degree in Electrical Engineering, RF Communications, or a related engineering discipline Minimum 2 years of relevant RF engineering experience Strong understanding of RF fundamentals including link budget analysis and linearity Practical and theoretical knowledge of RF communications and navigation systems Experience developing and delivering RF systems from concept through qualification and production Ability to obtain a TS/SCI security clearance Desirable Experience Active TS/SCI security clearance Experience working with space-grade hardware and systems RF communications system design, integration, and testing experience Familiarity with spacecraft and satellite communication architectures Experience working within multidisciplinary engineering teams Strong problem-solving and analytical skills Excellent communication and stakeholder management abilities Ability to work effectively under pressure and to demanding project schedules What's on Offer Competitive salary of $85,000 - $125,000 Comprehensive healthcare, dental, and vision coverage Retirement savings plan with company contribution Generous holiday allowance and paid leave Employee stock purchase opportunities Professional development and career progression opportunities Exposure to cutting-edge space and satellite communication technologies Opportunity to work on high-profile aerospace and defence programmes If you are an RF Engineer looking to contribute to the future of space communications and advanced aerospace systems, we would love to hear from you.

Job Title: Senior Systems Engineer Location: California, USA We are working with an innovative and rapidly growing space company in California that is developing next-generation spacecraft and mission systems. Following continued growth, they are looking to add a Senior Systems Engineer to their team. This is an opportunity to play a key role in the development of complex space systems, working across the full lifecycle from concept and architecture through to integration, testing, and mission execution. The Role As a Senior Systems Engineer, you will be responsible for defining system requirements, driving technical decisions, and ensuring successful integration across multiple engineering disciplines. You will work closely with teams across GNC, Flight Software, Avionics, Mechanical, Electrical, and Mission Operations to deliver high-performance spacecraft and mission-critical systems. The position offers significant technical ownership and the opportunity to contribute directly to the development of cutting-edge space technology. Key Responsibilities Define and manage system-level requirements and technical specifications Develop spacecraft and mission system architectures Lead requirements decomposition, verification, and validation activities Conduct trade studies and technical assessments Coordinate across multidisciplinary engineering teams Support integration, testing, and flight readiness activities Identify and manage technical risks throughout the development lifecycle Support design reviews including SRR, PDR, CDR, TRR, and FRR Ensure system performance meets mission objectives and customer requirements Requirements Bachelor's degree in Aerospace Engineering, Systems Engineering, Mechanical Engineering, Electrical Engineering, Physics, or a related discipline Proven experience within the aerospace, defense, or space industry Strong understanding of systems engineering principles and processes Experience developing complex spacecraft, satellite, launch vehicle, or mission-critical systems Experience with requirements management and system verification activities Strong communication skills and the ability to work across multidisciplinary teams

Job title: Senior Systems Engineer Location Scotland We re working with an innovative space company developing next-generation launch technology, who are looking to add a Senior Avionics Systems Engineer to their growing engineering team. This is a fantastic opportunity to play a key role in the development of an orbital-class launch system, taking ownership of onboard avionics systems across the full engineering lifecycle. The Role You ll act as a technical focal point across avionics and wider vehicle systems, working closely with systems engineering, GNC, propulsion, software, and ground support teams to deliver highly reliable flight hardware for a complex aerospace platform. Responsibilities will include: Leading avionics system design and integration activities Defining interfaces between onboard electronics, vehicle subsystems, and ground systems Supporting system architecture, requirements definition, and verification activities Managing technical schedules, development priorities, and engineering coordination Contributing to hardware/software trade studies and technical decision-making Supporting testing, troubleshooting, installation, and validation of electronic systems Working cross-functionally across multidisciplinary engineering teams What They re Looking For Degree qualified in Aerospace Engineering, Electrical Engineering, or similar 5+ years of experience within avionics, embedded systems, electronics, or complex systems engineering Strong background in integration, testing, or development of electronic systems Experience working within high-reliability industries such as space, aerospace, defence, automotive, or similar Understanding of systems engineering principles, interfaces, and V&V activities Previous technical leadership or project ownership experience Hands-on mindset with the ability to troubleshoot and support hardware integration activities Strong communication skills and ability to work across multidisciplinary teams