Entry-Level Systems Engineer – DoD Mission Systems

S3I Engineering; Lexington Park (MD); Hybrid; USD 90,000 - 130,000; Full time

Job summary

S3I Engineering is seeking a Systems Engineer I to support the development, integration, testing, and analysis of mission systems and sensors deployed across DoD platforms. You will troubleshoot, configure, and document using structured engineering processes in lab and field tests.

The role requires basic Linux troubleshooting, collaboration with government stakeholders, and occasional travel (12-18 weeks per year). A BS in a technical field and eligibility for DoD clearance are expected.

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.

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.
• Travel outside of normal business hours (<10% annually)

Skills

Linux troubleshooting

System analysis

Communication

Test environments

Education

BS in Engineering / CS

Tools

Git

Job description

S3I Engineering is seeking a Systems Engineer I to support the development, integration, testing, and analysis of mission systems and sensors deployed across DoD platforms. You will troubleshoot, configure, and document using structured engineering processes in lab and field tests.

The role requires basic Linux troubleshooting, collaboration with government stakeholders, and occasional travel (12-18 weeks per year). A BS in a technical field and eligibility for DoD clearance are expected.