Systems Engineer II — DoD Mission Systems & Flight Testing

S3I Engineering; Lexington Park (MD); Hybrid; USD 100,000 - 215,000; Full time

Job summary

S3I Engineering in Lexington Park, MD is seeking an entry to mid-level Systems Engineer II to support DoD mission systems, sensors, and integrated software architectures. You will lead testing, troubleshooting, and field deployments, collaborating with government personnel to deliver reliable, high‑performance solutions.

The role requires a BS in a technical field, Linux-based diagnostics, and the ability to obtain DoD 8570/8140 compliance within 6 months. Travel up to 12–18 weeks per year.

Qualifications

• Bachelor's degree or equivalent experience in a technical field.
• Strong Linux-based troubleshooting and diagnostics across multiple projects.
• Experience with reverse engineering to support troubleshooting and testing.
• Ability to obtain DoD 8570/8140 compliance within 6 months.

Responsibilities

• Lead installation, configuration, and testing on aircraft and in labs to identify deficiencies.
• Reproduce field issues, perform root cause analysis, and provide actionable fixes.
• Contribute to design reviews and derive requirements with traceability.
• Collaborate with government personnel to deliver reliable solutions.
• Troubleshoot multi-system problems involving sensors, networks, and software.
• Refine test methodologies to ensure consistent performance.
• Configure complex test benches for advanced testing scenarios.
• Lead software test events and mentor junior engineers.
• Prepare detailed field test reports for leadership and stakeholders.
• Travel to support tasking 12–18 weeks per year.

Skills

Linux troubleshooting

Reverse engineering

DoD certification readiness

System diagnostics

Technical communication

Education

BS in Engineering/CS/Math/Physics or related

Tools

Git

Job description

S3I Engineering in Lexington Park, MD is seeking an entry to mid-level Systems Engineer II to support DoD mission systems, sensors, and integrated software architectures. You will lead testing, troubleshooting, and field deployments, collaborating with government personnel to deliver reliable, high‑performance solutions.

The role requires a BS in a technical field, Linux-based diagnostics, and the ability to obtain DoD 8570/8140 compliance within 6 months. Travel up to 12–18 weeks per year.