Systems Engineer Level 4 Security Clearance

Position: Systems Engineer Level 4 with Security Clearance
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.

Required Qualifications:

* 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. Compensation and Benefits:
* Salary Range: $90,000-$160,000
** depending on experience*
* * Full Benefits:
Cigna Medical, Dental, Vision, 401K, PTO, Sick Leave if required by law, and Holidays