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# Systems Engineer Level 3 - 164508

- **Company:** Zachary Piper
- **Location:** St. Louis, MO, United States
- **Experience:** Experienced
- **Salary:** $90,000.0 - $160,000.0
- **Contract:** Permanent contract
- **Skills:** Systems Engineering, Systems Development Life Cycle, Systems Modeling Language, Systems Architecture, SC Clearance, Information Technology
- **Published:** October 14, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9236030/systems-engineer-level-3-164508

## About the Role

* Bachelor's degree in Engineering, Engineering Technology, Computer Science, Physics, Mathematics, Chemistry, or related technical field.
 * 5+ years of engineering experience with a Bachelor's, 3+ years with a Master's, or relevant experience with a PhD.
 * Hands-on experience with MBSE , Cameo/MSOSA , and/or SysML .
 * Active Secret Clearance (required prior to start).
 * Ability to work 100% onsite in St. Louis or Seattle.

Preferred Skills:

 * Experience supporting proprietary or classified aerospace/defense programs.
 * Background in autonomy, mission systems, or advanced weapons system development.
 * Familiarity with Digital Engineering pipelines and model-based lifecycle integration.
 * Strong communication skills and comfort working with multidisciplinary engineering teams.

## Description

* Support cross-functional engineering teams in developing advanced autonomous and complex systems aligned with program milestones and customer expectations.
 * Implement and mature Model-Based Systems Engineering (MBSE) methodologies within a Digital Engineering ecosystem.
 * Develop and maintain system architectures, requirements, and interfaces using tools such as Cameo , MSOSA , and SysML .
 * Execute full lifecycle systems engineering activities, including:
 + Requirements decomposition & traceability
 + System architecture modeling
 + Interface definition & management
 + Operational and environments analysis
 + Specification development
 + Trade studies and technical assessments
 + Risk identification & mitigation
 + Verification, validation, and test planning
 + Certification planning & execution
 * Support technical reviews, documentation, and customer-facing deliverables.
 * Collaborate with SMEs across multiple engineering disciplines to integrate complex system capabilities.