Model‐ Systems Engineer; Level 3

Zachary Piper is seeking a Model‑Based Systems Engineer (Level
3) to join an advanced aerospace engineering team in St. Louis, MO (Berkeley site). This role is 100% ONSITE
. The Systems Engineer will be responsible for developing system architectures, building SysML models, and managing requirements to support next‑generation aircraft, weapons systems, and air dominance programs. This position requires strong Systems Engineering experience
, hands‑on MBSE/SysML modeling
, proficiency with DOORS
, and the ability to collaborate across multidisciplinary engineering teams to deliver accurate, integrated, and testable system solutions.

• Develop and maintain SysML models using MBSE tools such as Cameo or MSOSA
• Translate high‑level system requirements into detailed, traceable subsystem requirements
• Use DOORS to manage, organize, and maintain requirement baselines and traceability
• Partner with architects, software engineers, hardware teams, and mission systems experts to design and integrate complex system solutions
• Support system architecture definition, interface management, and integration planning
• Participate in trade studies, risk assessments, and milestone technical reviews
• Contribute to verification and validation (V&V) planning for mission‑critical and safety‑critical systems
• Document system behaviors, relationships, and architecture elements within the MBSE environment
• Work closely with engineering leadership and Subject Matter Experts to ensure consistent application of Systems Engineering best practices

• Bachelor’s degree in Engineering, Physics, Computer Science, Mathematics, or related field
• 5+ years of engineering experience
• 4+ years of Systems Engineering experience
• Hands‑on experience with SysML modeling tools (Cameo, MSOSA, or equivalent)
• Experience using DOORS for requirements management and traceability
• Background supporting aerospace, defense, avionics, weapons systems, or other highly complex systems
• Experience with system architecture, interface control, decomposition, and verification planning
• Strong analytical, organizational, and communication skills
• Must be able to obtain a Secret Clearance (active Secret within 24 months preferred)

• Hourly Pay Rate: $57.69/hour
• Benefits: 11 paid holidays, 10 PTO days (contractor)
• Location: 100% ONSITE in St. Louis, MO (Berkeley)

This role opens for applications on 3/11/2026 and will remain open for at least 30 days
.

Keywords:

Model-Based Systems Engineer, MBSE, Systems Engineer, Systems Engineering, SysML, Cameo, Magic Draw, MSOSA, Rhapsody, Architecture Modeling, System Architecture, Mission Systems, Avionics Systems, Fighter Aircraft, Air Dominance, Phantom Works, Weapons Systems, Aircraft Systems, Complex Systems, Requirements Engineering, Requirements Decomposition, Requirements Traceability, DOORS, DOORS Next Gen, IBM DOORS, Verification and Validation, V&V, Test Planning, Integration Engineering, Interface Control Documents, ICD, System Interfaces, System Integration, Trade Studies, Risk Management, System Modeling, Digital Engineering, Digital Thread, Digital Twin, Safety-Critical Systems, Mission-Critical Systems, Airworthiness, Certification, MIL-STD, MIL‑STD‑516, DO‑178C, DO‑254, Aerospace Engineering, Defense Engineering, DOD Programs, Secret Clearance, Cleared Engineer, Security Clearance, St.

Louis MO, Berkeley MO, Onsite Engineering, Model-Based Design, Model Development, Aircraft Integration, Simulation, Engineering Lifecycle, Requirements Baseline, Confluence, Jira, Agile Systems Engineering, Cross‑Functional Engineering, Defense Contractor, Combat Systems, Operational Architecture, Functional Architecture

#LI-KG2 #LI-ONSITE