Guidance Navigation & Controls Engineer; Senior-Level

Guidance Navigation & Controls Engineer (Senior-Level) - (BGNCEE
090826.2)

Posting/External Job Title

Guidance Navigation & Controls Engineer (Senior-Level)

Location

Remote/Onsite/Hybrid

100% Onsite

Job Type

Full-time

# of Hires Needed

1

Education

Bachelor's Degree

Travel

None

Security Clearance Required

TS/SCI

Pay Range (All offers will be based on experience)

$ - $/yr

Cimarron is seeking a senior-level
Guidance Navigation & Controls Engineer
to rapidly prototype, develop, and field novel space and hypersonic capabilities. ESG delivers first-of-kind solutions for customers in a fast-paced, multidisciplinary environment. You will design GN&C algorithms, build high‑fidelity simulations, implement and test flight software, and support integration and flight test in both atmospheric and space.

• Design, implement, and verify guidance, navigation, and control algorithms for spacecraft, re-entry vehicles, and hypersonic/airborne platforms.
• Develop and maintain 6‑DOF dynamics simulations and associated analysis tools for mission and performance assessment.
• Implement and validate GN&C flight software (MATLAB/Simulink models and C/C++ prototypes) and integrate with testbeds and avionics.
• Apply astrodynamics and flight mechanics to mission design, novel orbit concepts, and trajectory optimization.
• Apply aerodynamics, atmospheric flight mechanics, and controls knowledge to support the design of re-entry guidance, navigation, and flight control functions
• Develop powered and unpowered guidance laws and autonomy tools for on‑orbit and atmospheric operations.
• Support troubleshooting of operational anomalies, functional tests, and service incidents.
• Produce concepts of operations, simulation artifacts, and test procedures to enable rapid iteration from prototype to flight test.
• Collaborate with cross‑functional teams (systems engineering, avionics, test, and business development) and communicate technical tradeoffs to stakeholders.
• Independently identify inefficiencies, propose solutions, and implement reusable tools and automations.

• Due to facility security requirements, only U.S. citizens are eligible for consideration at this time.
• Ability to complete a pre-employment background check and drug screening, which will include, but is not limited to, testing for marijuana use.
• This position requires access to federal facilities. Candidates must possess a valid, unexpired Real
  -compliant driver's license or state-issued identification card at the time of hire. If you are unsure whether your  Real
  -compliant, please check for the star symbol in the upper portion of your driver's license or state .
• Must have an active TS/SCI security clearance.
• 11 or moreyears of related work experience OR an equivalent combination of education and experience (Ex. PhD, Master's + 3 or more years' related work experience).
• Engineering experience with aircraft, missile, spacecraft, autonomous platform or similar vehicles.
• Proficiency with MATLAB and Simulink.
• Proficiency developing GN&C algorithms, models and simulations.
• Experience developing with C/C++, Python or C#.
• Bachelor of Science degree in Engineering, Engineering Technology (including Manufacturing Technology), Computer Science, Data Science, Mathematics, Physics, Chemistry or non-US equivalent qualifications directly related to the work statement.

• Degree in aerospace/aeronautical engineering (BS/MS/PhD).
• 15 or moreyears related technical experience or an equivalent combination of education and experience.
• Active Tier 5 (T5) Clearance, formerly known as Single Scope Background Investigation (SSBI) is Preferred.
• Experience with spacecraft operations, space environment effects, or…