Guidance, Navigation & Controls Engineer (mid-level or lead)

About the Position

Bring your ideas to life at Boeing, where we innovate and collaborate to make the world a better place. Millennium Space Systems, a part of Boeing Defense, Space and Security (BDS), is a fast, agile small satellite company focused on national security space. Our missions have a direct impact on global security, like missile warning and Earth observation.

Our team is curious, bold, and innovative. We take risks, innovate, and explore new techniques and technologies. We influence change because we challenge the status quo. And when we watch our satellites launch, we know each one of us made it happen.

The Guidance, Navigation, and Controls (GNC) Engineering Team delivers the GNC subsystem for a program and/or constellation. This includes subsystem/system level analysis to ensure requirements compliance, sensor and actuator selection, and Flight Control Software (FCSW) development and verification. Engineers in the GNC group are integral throughout the entire program lifecycle, providing mission and system design inputs, critical analysis products, software/algorithm development, support to satellite integration and test (I&T), and on-console support for on-orbit operations.

As a Lead/Senior GNC Engineer, you will be the Responsible Engineering Authority (REA) for delivery of the GNC subsystem. You may be the REA for a single program, or oversee a portfolio of programs as the GNC focal. You will be a technical leader, decomposing complex work, interfacing across engineering and manufacturing teams, reporting up the program/functional management chains, and providing guidance and mentorship to others on the team.

Responsibilities

• Deliver the GNC subsystem (hardware, software, and analysis) for a satellite program
• Perform GNC subsystem design, analysis, software development, and component selection to meet program requirements
• Manage the development of GNC products within the constraints of program cost and schedule
• Report technical execution progress to program and company leadership, and track/mitigate risk
• Interface with other satellite subsystems as well as systems engineering and program management to ensure system-level performance
• Technical leadership of a team of GNC engineers in support of a program, including decomposition and delegation of tasks

Requirements

• Bachelor's degree and 5 or more years' related work experience or an equivalent combination of technical education and experience
• 3+ years’ experience with GNC fundamentals
• 1+ years’ of spacecraft system level experience
• 1+ years’ experience collaborating with other engineering subsystems and program leadership
• This position requires the ability to obtain a U.S. Security Clearance for which the U.S. Government requires U.S. Citizenship

Preferred Qualifications

• Level 4: Bachelor's degree and 9 or more years' related work experience or an equivalent combination of technical education and experience
• Satellite I&T and on-orbit operations experience
• Demonstrated experience decomposing large/complex nebulous tasks into clearly defined subsets of work that can be done personally or delegated to other members of the team.
• Ability to perform complex GNC system analyses of kinematics, dynamics, and control systems using existing and/or self-developed tools
• Strong fundamentals of project management, including monitoring cost and schedule performance
• Ability to set direction of program work and create processes and standards to support the group
• Advanced understanding of classical and modern control theory, system-level trade studies, architecture development, and systems integration & analysis
• Experience as a mentor
• Active TS/SCI clearance

We Offer

• Competitive base pay and variable compensation opportunities
• Health insurance, flexible spending accounts, health savings accounts, retirement savings plans, life and disability insurance programs
• Opportunities for paid and unpaid time away from work
• Generous company match to your 401(k)
• Industry-leading tuition assistance program pays your institution directly
• Fertility, adoption, and surrogacy benefits
• Up to $10,000 gift match when you support your favorite nonprofit organizations

About the Company

At Millennium Space Systems, a Boeing Company, we strive to deliver a Total Rewards package that will attract, engage, and retain the top talent. We are committed to fostering an environment for every teammate that’s welcoming, respectful, and inclusive, with great opportunity for professional growth.

Locations: El Segundo, California; Los Angeles, California

Job ID: JR2026515985

Category: Engineering

Role Type: Onsite

Post Date: Aug. 04, 2026

Applications accepted until: Aug. 28, 2026

Shift: 1st shift

Security Clearance: This position requires the ability to obtain a U.S. Security Clearance for which the U.S. Government requires U.S. Citizenship. An interim and/or final U.S. Top Secret/SCI Clearance Post-Start is required.

Visa Sponsorship: Employer will not sponsor applicants for employment visa status.

Relocation: Relocation assistance is not a negotiable benefit for this position.

Equal Opportunity Employer: Boeing is an Equal Opportunity Employer. Employment decisions are made without regard to race, color, religion, national origin, gender, sexual orientation, gender identity, age, physical or mental disability, genetic factors, military/veteran status, or other characteristics protected by law.