Senior Software Engineer - Mission-Critical Defense DevSecOps

Inmarsat PLC; Dayton (OH); Hybrid; USD 130,000 - 162,000; Full time

Job summary

Inmarsat Government is seeking a Senior Software Engineer to lead development, integration, testing, deployment, and sustainment of mission-critical software for defense customers.

The role requires a Bachelor's degree in CS/Software Engineering, 10+ years of experience, and an active TS/SCI clearance. You will drive architecture decisions, embrace Agile/DevSecOps, and ensure secure software lifecycles across teams.

Qualifications

• Bachelor's degree in computer science or related field.
• 10+ years of software development experience.
• Proficiency in modern programming languages and Agile methodologies.
• Experience with secure software development and software lifecycle management.
• Active TS/SCI clearance.

Responsibilities

• Lead development, integration, testing, deployment, and sustainment of mission-critical software for defense customers.
• Provide technical leadership in software architecture and design while advancing Agile and DevSecOps practices.
• Lead code reviews, system integration, defect resolution, and cybersecurity compliance efforts.
• Drive technical documentation and collaborate across engineering disciplines to deliver secure, scalable, and mission-ready software solutions.

Skills

10+ years experience

Agile methodologies

Security-focused development

DevSecOps

Education

Bachelor's degree in computer science/software engineering or related field

Job description

Inmarsat Government is seeking a Senior Software Engineer to lead development, integration, testing, deployment, and sustainment of mission-critical software for defense customers.

The role requires a Bachelor's degree in CS/Software Engineering, 10+ years of experience, and an active TS/SCI clearance. You will drive architecture decisions, embrace Agile/DevSecOps, and ensure secure software lifecycles across teams.