Senior InfoSec Engineer – Classified Systems

Lockheed Martin; Bedford; On-site; GBP 90,000 - 130,000; Full time

Job summary

Lockheed Martin UK is seeking an Information Security Engineer to drive Secure by Design across classified IT systems. You will lead security architecture reviews, threat modelling, and risk assessments throughout the lifecycle, producing RMADS and related accreditation artefacts.

You will coordinate with accreditors, security controllers, and customer representatives to obtain Authority to Operate (ATO) approvals, ensuring ongoing compliance with SPF, NCSC, JSP 440, and DV readiness where

Qualifications

• Experience securing highly regulated IT environments.
• Ability to communicate technical security concepts to stakeholders.
• Proven experience in security accreditation processes and RMADS.

Responsibilities

• Lead Secure by Design across classified IT systems and projects.
• Conduct security architecture reviews, threat assessments, and risk analysis.
• Develop security documentation and accreditation artefacts.
• Coordinate system accreditation activities for sensitive systems.
• Work with accreditors and customer security representatives to obtain ATO.

Skills

Security architecture

Threat modelling

Risk assessments

Secure by design

Accreditation

Communication

UK SC/DV clearance

Cyber security

Regulated environments

Education

Degree in Cyber Security or related discipline

Tools

AWS

SIEM

Vulnerability management

JSP

Windows

Linux

Job description

Lockheed Martin UK is seeking an Information Security Engineer to drive Secure by Design across classified IT systems. You will lead security architecture reviews, threat modelling, and risk assessments throughout the lifecycle, producing RMADS and related accreditation artefacts.

You will coordinate with accreditors, security controllers, and customer representatives to obtain Authority to Operate (ATO) approvals, ensuring ongoing compliance with SPF, NCSC, JSP 440, and DV readiness where