Senior Systems Engineer – Defense Tech (TS/SCI, 9/80)

Jobtome; Bailey (TX); On-site; USD 120,000 - 160,000; Full time

Job summary

L3Harris Technologies is seeking a Senior Specialist, Systems Engineer in Greenville, TX to lead the design, development, integration, and delivery of advanced defense software solutions. You will interface with customers, drive end-to-end software lifecycle activities, and guide small teams in diagnostics and security-focused features.

The role requires a strong background in software architecture, systems integration, and secure development across multiple languages and platforms, with an

Qualifications

• Active US TS/SCI security clearance.
• 6+ years in defense, aerospace, or mission-critical environments.
• Graduate degree or 10 years experience in lieu of degree.
• 5+ years Linux, Jira, Confluence, DOORS experience.
• Experience with unit testing frameworks and software verification.
• Strong technical documentation and customer-facing communication.

Responsibilities

• Lead end-to-end software development including architecture, design, implementation, testing and delivery.
• Serve as primary technical interface with customers, coordinating schedules and requirements.
• Design scalable authentication and authorization solutions for access control.
• Lead small teams developing diagnostics and monitoring tools for system health.
• Maintain interface definitions and technical artifacts.
• Support modernization with containerization and reduce legacy code debt.

Skills

Security clearance

System architecture

Stakeholder communication

Team leadership

Education

Bachelor’s degree in EE / CE / CS / SE

Graduate degree + 4 years exp.

10 years exp in lieu of degree

Tools

Linux

Jira

Confluence

DOORS

Job description

L3Harris Technologies is seeking a Senior Specialist, Systems Engineer in Greenville, TX to lead the design, development, integration, and delivery of advanced defense software solutions. You will interface with customers, drive end-to-end software lifecycle activities, and guide small teams in diagnostics and security-focused features.

The role requires a strong background in software architecture, systems integration, and secure development across multiple languages and platforms, with an