GMD Ground Systems Principal Systems Engineer

APEX TK LLC

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Huntsville, AL Until 9/30/2026 12+ years exp First posted August 1, 2026 Last posted August 1, 2026
Job description

General Overview

APEX TK is looking for an amazingly talented GMD Ground Systems Principal Systems Engineer to join our team! In this role, you will work as a technical staff member of the GMN SE team supporting definition of performance requirements for the GMD Ground System.

What You'll Be Doing:

  • Participate in the development, management, and planning for current and future capabilities as it relates to requirements for Ground-based Midcourse Defense (GMD) Ground Support Systems (GSS) missile field silos and interfaces.
  • Review proposed requirement changes in higher-level specifications for impacts to GSS baseline.
  • Review peer/counterpart deliverables, drawings, models, and specifications for consistency with GSS baseline.
  • Coordinate with GMD Warfighter, Ground Based Interceptor, Next Generation Interceptor, and GSS Subject Matter Experts to identify and develop new or modified requirements, and assist in incorporating changes into the GMD System Engineering & Integration flow down of requirements.
  • Develop inputs to a cost estimate and analyze schedule impacts of new or modified requirements.
  • Package technical, cost, and schedule impacts to advocate acceptance or rejection of the new or modified requirements.
  • Coordinate with Missile Defense Agency (MDA) Stakeholders to identify and resolve any issues related to changes in Missile Defense System (MDS) system requirements.
  • Translate MDS Core Standards, Mission Assurance Plan, Parts, Materials, Processes Procedures, Cybersecurity, and other agency objectives and processes into GSS requirements.
  • Review GSS contractor's decomposition of requirements into the Prime Item Development Specifications and verification products, which includes coordination of GSS Contractor verification products in combination with government assessment activities.

What Required Skills You Bring:

  • Master’s Degree in Engineering or related STEM discipline is required.
  • Minimum of 12 years direct experience in complex system of systems or missile defense system engineering is required.
  • Proficiency in Microsoft Office (Word, Excel, PowerPoint, Outlook) and DOORS is required.
  • Excellent communication, collaboration, and leadership skills are required.
  • Ability to work effectively in a fast-paced, dynamic environment is required.
  • Active security clearance (SECRET or above) is required.

Desired but not Required:

  • MDA experience desired.
            About this role

            Summary

            Lead system engineering for missile defense ground systems, requirements development, and stakeholder coordination.

            Job title

            GMD Ground Systems Principal Systems Engineer

            Experience level

            12+ years

            Minimum experience

            12+ years exp

            Industry

            defense

            Location requirements

            Huntsville, AL; on-site; remote not specified

            Salary

            Not specified

            Management role

            No

            Skills & keywords

            Required skills

            engineeringsystem of systemsrequirements analysisMicrosoft OfficeDOORScommunicationcollaborationleadershipsecurity clearance

            Preferred skills

            MDA experience

            Specializations

            missile defensesystem of systemsrequirements analysiscybersecuritysystem engineering
            Locations

            Structured locations inferred from the posting.

            Huntsville, AL, USA

            On-site City