Senior Cloud & Zero Trust Security Architect

Leidos seeks a Security Architect to design and guide secure solutions for mission-critical government and commercial clients. In this role, you will define cloud, on-prem, and hybrid security architectures; lead threat modeling and risk assessments; and ensure alignment with NIST and related standards. Partnering closely with engineering and IT, you'll embed Zero Trust principles, IAM, and network protections into scalable designs. Leidos offers impactful work, a collaborative, mission-driven culture, flexible work options, and comprehensive benefits supporting your growth and well-being.

Responsibilities

• Design and document end-to-end security architectures for cloud, on-prem, and hybrid environments.
• Lead threat modeling, risk assessments, and security design reviews for mission-critical systems.
• Align solutions with NIST, ISO, and government security standards and client requirements.
• Collaborate with engineering, IT, and project teams to embed security into system designs and roadmaps.
• Select and integrate security tools and controls, including IAM, network, and endpoint protections.
• Develop security patterns, reference architectures, and technical guidance for delivery teams.
• Support proposals, architecture reviews, and customer briefings as a security subject matter expert.
• Monitor emerging threats and technologies to continuously improve security architectures.

Required Skills

• Cloud security architecture
• Network security design
• Zero Trust frameworks
• Identity and access management (IAM)
• Secure systems engineering
• Security risk assessment
• Threat modeling
• Security compliance (NIST, ISO 27001)
• Security automation and tooling
• Technical documentation