Sr. Systems Engineer (Flight Software and GN&C)

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At Sierra Space, we are seeking leaders to guide our vision of a future where humanity lives and works in space, on moons, and on distant planets. People are married, children are born, families are raised, businesses are built, and new civilizations thrive. Sierra Space builds and delivers the future of space transportation, destinations and infrastructure, offering “space-as-a-service” in support of the new space economy.  

As a Systems Engineer, you will be using your skills and expertise to research, architect, model, simulate, test, certify and improve cutting edge products and services. You'll be developing complex system architectures within contextual modeling platforms, ushering them from operational concept through preliminary and detailed design, simulation, and test using progressive tools. As a cross-functional engineer, you are in charge of system-level ownership of new products and processes through the product lifecycle.

Sierra Space, based in Louisville, Colorado with operations in Madison, Wisconsin and Durham, North Carolina, designs and manufactures advanced spacecraft, satellites, propulsion and environmental systems, spacecraft subsystems and components for the U.S. government (including NASA), commercial customers and international organizations. Learn more about Sierra Space  

We will give humanity platforms in space that will enable new discoveries to benefit life on earth. We are hands-on, embrace risk, and move quickly to fly impactful solutions for our customers.  

This position is for Flight Software (FSW) and Guidance, Navigation, and Control (GN&C) support for Advanced Development spacecraft programs. As a FSW & GN&C engineer, you will be responsible for designing, developing, integrating, and testing flight software and avionics/GN&C hardware.  Your work will ensure we meet customer requirements by making data-driven decisions in architecting, planning, building and testing the design in a testbed prototype and subsequent delivery of the end product.

This candidate will have experience with all portions of the software life cycle (concept development, requirements definition, design, development, testing, and deployment). This individual must have a strong working knowledge of object-oriented design using the C and C++ languages, and must have a strong background in deploying and testing flight code on embedded processors.  The ideal candidate will have recent experience with at least one real-time operating system (such as VxWorks), and be familiar with both asymmetric and symmetric multiprocessing architectures.  The candidate must also be comfortable working in an Agile Scrum environment.

Additionally, the successful candidate will have experience doing GN&C-related analysis such as performance analysis, multi-sensor fusion and estimation/filtering, sensor processing and/or other advanced GN&C analyses.  This individual has a strong working knowledge of Matlab and Simulink and experience with code development. 


  • Bachelors of Science degree in Aerospace Engineering, Applied Math, Physics, or related discipline and typically 10 or more years of relevant experience; higher education may be considered in lieu of experience

  • Relevant work experience may substitute for required education 

  • Experience developing models and simulations using software and software languages such as MATLAB, Simulink, Python, or C++.

  • Experience with standard COTS packages (such as Systems Tool Kit (STK))

  • Knowledge of interface and design documentation such as Functional block diagrams

  • Practical experience with GN&C development team(s)

  • Practical experience developing, testing and certifying GN&C algorithms and flight software

  • Confident with MATLAB/Simulink and/or C, C++. JAVA, Python

  • Previous experience and skills in simulation, implementation, lab integration and/or test

  • Ability to rapidly work with minimal supervision on projects involving both small and large engineering teams

  • Desire for new challenges, to be on the ground floor of an exciting capability for our nation, and to be part of the initial cadre developing a new multi-domain system

  • Willingness to work on a small team performing complex engineering design evaluations for a diverse mission where everyone has input matters

  • Experience working on multi-disciplinary design and development teams

  • Thorough understanding of systems engineering principles, requirements analysis (RA), CONOP development and Verification and Validation (V&V)


  • Masters of Science degree in Engineering, Physics or related discipline

  • Working knowledge of spacecraft GN&C hardware and algorithms

  • Experience leading GN&C integration efforts for a spacecraft program

  • Experience performing Design and Optimization of avionics systems

  • Advanced experience with requirements management and system modeling tools, such as SysML, Cameo Enterprise Architect, Teamwork Cloud, DOORS, Unified Architecture Framework

  • Excellent communication skills (written and verbal). Demonstrated experience briefing technical subjects to both technical and non-technical people and delivering key messages and insights from analysis products

  • The ability to obtain and maintain a Security Clearance may be required Learn more about the background check process for Security Clearances


To conform to U.S. Government international trade regulations, applicant must be a U.S. Citizen, lawful permanent resident of the U.S., protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. Department of State or U.S. Department of Commerce.  

With 30+ years of proven spaceflight heritage, Sierra Space has provided more than 4,000 space systems, subsystems and components to customers worldwide, and participated in more than 500 missions to space, including to Mars. The company has technology in production and in development to enable space habitats for short- and long-duration space travel, a fleet of Dream Chaser spaceplanes, and the first free-flying commercial space station. Please visit www.sierraspace.com to learn more about Sierra Space, its business areas, capabilities, programs, products and services.  

Estimated Starting Salary Range: $117,040.88 - $160,931.20

Sierra Space offers annual incentive pay based upon performance that is commensurate with the level of the position.

Sierra Space offers a generous benefit package, including medical, dental, and vision plans, 401(k) with 150% match up to 8%, life insurance, 3 weeks paid time off, tuition reimbursement, and more.

As COVID-19 continues to significantly impact our employees, families and communities, we are taking action to address the increased risk and uncertainty COVID-19 and associated variants pose in the workplace. SNC is committed to supporting our employees while ensuring we continue to meet essential national security needs of our country.

With employee health and safety as our top priority, and as a federal contractor, SNC will continue to require COVID-19 vaccination status for all employees including new hires. In accordance with applicable requirements, all current and newly hired employees who are unvaccinated may be required to adhere to enhanced onsite safety protocols including weekly COVID-19 testing, face coverings, and social distancing. 

The status of applicable COVID-19 vaccination requirements are subject to change depending on applicable court orders and the course of ongoing litigation. Candidates may later be required to show proof of COVID-19 vaccination or have an approved exemption. 

At Sierra Space, our mission is to dream, innovate, inspire and empower the next generation to transform humanity through technology and imagination. As an Equal Opportunity Employer, we welcome our employees to bring their whole selves to their work. Sierra Space is committed to fostering an inclusive, accepting, and diverse environment free of discrimination on the basis of race, color, age, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran. Contributions to Sierra Space come in many shapes and styles, and we believe diversity in our workforce fosters new and greater ways to dream, innovate, and inspire.

Sierra Space
Sierra Space

United States, Broomfield, CO

Posted 8d ago

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