Mission Systems Engineer I - Testing & Linux Specialist

s3iengineering; Lexington Park (MD); On-site; USD 90,000 - 130,000; Full time

Benefits offered by this job

Medical and Dental benefits

Holiday and Paid Leave

401K with Matching

Profit‑Sharing Plan

Job summary

S3I Engineering, LLC is seeking a Systems Engineer I to support development, integration, testing, and analysis of mission systems and sensors for DoD platforms. This role emphasizes troubleshooting, system configuration, testing execution, and technical documentation within structured engineering processes across lab and field environments.

Based in Lexington Park, MD, you will work with DoD assets, adhere to cybersecurity practices, and travel 12–18 weeks per year.

Qualifications

• Bachelor of Science in Engineering, Computer Science, Computer Hardware, Mathematics, Physics, or related technical field; or equivalent experience.
• Foundational experience in Linux-based troubleshooting and system analysis across separate interdependent projects.
• Familiarity with constructing or configuring basic computer systems in a Linux environment with multiple interdependent services or projects.
• Ability to obtain DoD 8570/8140 compliance by certification or education within 6 months of starting.
• Strong organizational and communication skills.
• US Citizenship and eligibility for a TS/SCI clearance.
• Ability to access government facilities and travel between office and government sites as required.

Responsibilities

• Assist in the installation, configuration, and testing of mission systems with related sensors and other integrated software within government labs and aircraft environments.
• Conduct basic troubleshooting using Linux command‑line tools and established diagnostic procedures.
• Configure test bench systems to support validation of software requirements and system behavior.
• Support reproduction of system anomalies reported from fielded systems and assist in documenting root cause indicators.
• Participate in design reviews under supervision, offering technical observations aligned with requirements derivation.
• Prepare field test reports, summary documents, and structured notes for senior engineers and government personnel.
• Follow DoD and DCSA cybersecurity practices during configuration, testing, and system interaction.
• Provide dependable and professional support to government stakeholders and partner organizations.
• Travel to support tasking approximately 12-18 weeks annually.

Skills

Linux troubleshooting

System analysis

Cross-team collaboration

Communication skills

US Citizenship

TS/SCI eligibility

Education

BSc in Engineering or related field

Tools

Git

Job description

S3I Engineering, LLC is seeking a Systems Engineer I to support development, integration, testing, and analysis of mission systems and sensors for DoD platforms. This role emphasizes troubleshooting, system configuration, testing execution, and technical documentation within structured engineering processes across lab and field environments.

Based in Lexington Park, MD, you will work with DoD assets, adhere to cybersecurity practices, and travel 12–18 weeks per year.