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Location
In office (Chantilly)
Seniority
Junior · 2+ years exp
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 23, 2026. First seen by Alion on Oct 21, 2026. APEX TK scores B on the Alion truth index.

Overview
Company
Impact
Profile match
Systems engineering and acquisition expertise for complex defense programs, with custom AI and machine learning solutions built by the practitioners who do the.

APEX TK is seeking a highly motivated and skilled Astrodynamics Engineer to join our team supporting a critical government client. This position offers the opportunity to work on cutting-edge projects within the aerospace domain.

Responsibilities:

  • Work with our modeling and simulation team to conduct a wide variety of analyses in support of government satellite programs in all types of Earth orbits
  • Work with experts in astrodynamics, propulsion systems, launch trajectories, sensing, and High Performance Computing (HPC)
  • Opportunities to meet with and optionally present findings to local senior government customers
  • Use programming languages such as Python, C++, or others to leverage existing analysis tools and develop new ones
  • Conduct independent trade studies and technical assessments
  • Review and validate algorithms and results provided by external teams
  • Develop and present technical briefings
  • Depending on their interests and skills the applicant may work on one or more of:
    • Strategies for significant orbit changes
    • Multi-satellite Rendezvous and Proximity Operations (RPO)
    • Leverage Space Domain Awareness (SDA) sensor data to perform Orbit Determination on maneuvering satellite

        Required Qualifications:

        • 2-10 years of relevant experience.
        • Bachelor’s Degree in a STEM related field such as Engineering, Mathematics, Physics, Aerospace, Computer Science, etc.
        • Active Top Secret/SCI w/ CI Poly Clearance
        • Experience performing space-related engineering analysis (collecting, organizing, analyzing data) using one or more of the following: C++, Python, R, SQL, PostgreSQL, Linux, MATLAB, VBA, or STK
        • Ability to communicate findings and recommendations to internal and external customers
        • Solid understanding of orbital mechanics and space systems.
        • Experience with phenomenological models, including a demonstrated ability to model relevant physical phenomena and validate those models.

        Preferred Qualifications:

        • Master's degree in a STEM related field.
        • Experience with other simulation tools and programming languages.
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