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Systems Engineer 3 with Security Clearance

Legion Technical Solutions, LLCAurora, CO🇺🇸United StatesPosted 14 Aug 2026

Why This Role Stands Out

Leverage your systems engineering expertise in a mission-critical space ISR program with Legion Technical Solutions, offering a competitive salary of $150,000-$160,000 and comprehensive benefits. You'll thrive in this role if you are a mid-senior level engineer with an active TS/SCI clearance, eager to contribute to advanced technology development and enjoy robust career growth opportunities. Apply now to join a dynamic team and make a significant impact.

Quick Overview

Salary
$150k - $160k/yr
Work Type
On Site
Schedule
Employee
Level
Mid Senior

Job Description

Responsive recruiter Benefits:

  • 401(k)
  • Dental insurance
  • Health insurance
  • Paid time off
  • Relocation bonus
  • Vision insurance Senior Systems Engineer - Space ISR Location: Aurora, CO Work Arrangement: Onsite Clearance Required: Active TS/SCI Employer: Legion Technical Solutions Legion Technical Solutions has an exciting opportunity for a Senior Systems Engineer to support one of our client's premier programs within its Space Intelligence, Surveillance, and Reconnaissance organization.

This is an opportunity to contribute to a complex, mission-critical space program where your systems engineering expertise will directly support requirements development, architecture and design elaboration, system analysis, interface definition, test planning, and technical execution. The position is onsite in Aurora, Colorado, and requires an active and transferable TS/SCI clearance before starting.

What You'll Do

  • Analyze system behavior and develop operational use cases.
  • Decompose system requirements into clear and actionable lower-level requirements.
  • Define and manage system interfaces.
  • Determine how requirements will be verified and validated by the test organization.
  • Support requirements, architecture, and system-design development.
  • Provide systems engineering support for program test activities.
  • Help define test processes, program baselines, and test architecture.
  • Support regression testing across program baseline releases.
  • Participate in technical reviews, engineering meetings, and technical interchange meetings.
  • Collaborate with software, test, architecture, and program stakeholders in an Agile environment. Required Qualifications
  • Bachelor's degree in systems, mechanical, aerospace, electrical engineering, or a related technical field.
  • At least five years of relevant professional experience.
  • Experience across the systems engineering lifecycle, including one or more of the following:
  • Concept of Operations development
  • Requirements definition and management
  • Functional analysis
  • Interface definition and control
  • Systems engineering experience supporting a government contract.
  • Experience in a relevant mission domain, such as:
  • Mission-management ground systems
  • Space-based ISR platforms
  • Satellite ground systems
  • Command-and-control systems
  • Understanding of Agile principles, roles, and systems engineering practices.
  • Active and transferable U.S. government-issued TS/SCI clearance before starting.
  • U.S. citizenship, as required for security-clearance eligibility.
  • Ability to work onsite in Aurora, Colorado.

Preferred Qualifications

  • Experience working in an Agile development environment.
  • Experience with Jira, Confluence, Bitbucket, or similar development tools.
  • Experience with model-based systems engineering and Cameo Systems Modeler.
  • Requirements-management experience using DOORS or a comparable requirements database.
  • Experience supporting system verification, validation, integration, or regression testing.
  • Recent experience with classified space, ISR, or mission-management programs.

Why Consider This Opportunity? This position offers the opportunity to work on a premier national-security space program alongside experienced systems, software, architecture, and test professionals. You will contribute across the systems engineering lifecycle while helping deliver capabilities that support critical space ISR missions. Legion Technical Solutions is an equal-opportunity employer. All qualified applicants will receive consideration without regard to legally protected characteristics.

Compensation: $150,000.00 - $160,000.00 per year

Skills

Agile
Confluence
Jira

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