Systems Engineer Level 3 with Security Clearance
Zachary Piper Solutions, LLC Saint Louis
Zachary Piper Solutions is seeking a Model
- Based Systems Engineer (MBSE) Level 3 to support advanced aerospace and defense programs within a leading national security organization.
You'll join a high-impact Systems Engineering & Integration team driving next-generation autonomous and weapons system development across highly complex, proprietary programs.
This role is ideal for engineers who thrive in fast-paced environments and want to contribute directly to mission-critical, cutting-edge systems.This role is fully onsite in St.
Louis, Missouri or Seattle, Washington .
Candidates must hold an active secret clearance .
Responsibilities Include:- 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.
- 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.
- Salary Range: $90,000-$160,000
- Full Benefits: Cigna Medical, Dental, Vision, 401K, PTO, Sick Leave if required by law, and Holidays
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