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RT

Principal Cybersecurity Software Engineer (P4) | Onsite | DoD Secret Clearance Required

Cybersecurity Secure Software Development DoD Secret Clearance

About the Role

RTX is seeking a Principal Cybersecurity Software Engineer (P4) to support mission-critical security efforts at our onsite location in East Hartford, Connecticut. This role requires the ability to obtain and maintain a U.S. government-issued security clearance, with an active DoD Secret clearance required after day 1.

Responsibilities

  • Design, develop, and secure software systems to protect aerospace and defense platforms
  • Lead cybersecurity engineering efforts across the software lifecycle, from requirements through delivery
  • Collaborate with engineering teams to assess threats, implement security controls, and reduce risk
  • Contribute to secure coding practices, vulnerability mitigation, and technical documentation
  • Support compliance and security review activities related to cleared environments

Requirements

  • U.S. citizenship required to be eligible for a security clearance
  • Active DoD Secret clearance required after day 1 (and ability to maintain clearance)
  • Experience building and securing software systems in a security-focused environment
  • Strong understanding of secure software engineering principles and threat-aware development
  • Ability to work onsite in East Hartford, CT

Benefits

  • Opportunity to work on complex, high-impact aerospace and defense challenges
  • Support for professional growth within a leading global technology organization
  • Engagement with teams focused on security, reliability, and mission success
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Posted on July 14, 2026
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