Senior Systems Security Engineer — SbD & RMF Lead

Prattwhitney; High Wycombe; On-site; GBP 70,000 - 110,000; Full time

Job summary

RTX seeks a Senior Systems Security Engineer to drive secure system design and delivery within the FJCAST training programme. You will lead security requirements, architecture and testing, collaborating with engineering teams and customers to ensure SbD compliance and successful ATO outcomes.

The role emphasizes governance, integration with delivery teams, and lifecycle security across multiple domains, with a strong emphasis on government standards and clearances.

Qualifications

• Bachelor of Science in STEM with extensive security experience.
• Experience generating security/cyber requirements, design and architecture artifacts.
• Experience in Information Assurance and RMF/STRIDE.
• Technical leadership experience.

Responsibilities

• Perform Task Lead duties (planning, product owner, scrum master).
• Develop RMF following STRIDE model.
• Create SbD planning and implementation policies.
• Develop top-level security requirements and flow-downs.
• Interact with customers to refine requirements and solutions.
• Support plans, estimates, tracking, and risk mitigation.
• Provide evidence for ATO and through-life security management.
• Participate in security testing to obtain ATO.
• Define and assess security solutions meeting customer needs.
• Advise program management on security architectures and SbD.

Skills

Security governance

RMF/STRIDE

Threat modelling

System security engineering

Stakeholder collaboration

Security architecture

Education

BSc in STEM

MSc in related field

14 years experience alternative

Tools

Python scripting

PowerShell scripting

Linux Bash

Ansible Playbooks

Job description

RTX seeks a Senior Systems Security Engineer to drive secure system design and delivery within the FJCAST training programme. You will lead security requirements, architecture and testing, collaborating with engineering teams and customers to ensure SbD compliance and successful ATO outcomes.

The role emphasizes governance, integration with delivery teams, and lifecycle security across multiple domains, with a strong emphasis on government standards and clearances.