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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 25, 2026. First seen by Alion on Oct 21, 2026. APEX TK scores B on the Alion truth index.

Overview
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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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