Senior Cybersecurity Architect

Senior Cybersecurity Architect

The Defense Sector at Leidos is looking for a Senior Cybersecurity Architect to support a fast‑paced program with the Air Force Life Cycle Management Center. The role requires comprehensive subject‑matter expertise and execution of cybersecurity engineering and architecture functions to protect the security and integrity of program IT infrastructure and mitigate cyber threats. As an integral member of the program’s leadership team, you will collaborate on strategic initiatives to ensure alignment with overall program goals.

In this role you will lead the design, implementation, and governance of security solutions across enterprise environments, ensuring confidentiality, integrity, and availability of both on‑premises and cloud‑hosted assets while enabling secure innovation at scale.

Security and compliance in defense‑sector classified networks often slow mission software because the processes that protect it also create bottlenecks. This position builds a better architecture—policy‑as‑code, zero‑trust design, continuous evidence, and inheritable Authorization to Operate—providing a stronger, stricter, and more consistent security posture.

• Develop and implement enterprise‑level cybersecurity strategies aligned with DoD and federal guidelines.
• Ensure selected technologies and architecture designs are resilient to modern cyber threats.
• Architect and implement secure cloud infrastructure across platforms.
• Define and enforce cloud security policies, standards, and automation frameworks.
• Support timely completion of Authorization to Operate (ATO) activities across multiple environments at various classification levels.
• Integrate security into CI/CD pipelines and Dev Ops workflows.
• Support cloud identity and access management (ICAM), encryption, and key management systems.
• Configure, tune, and monitor enterprise security tools.
• Monitor network and system security to identify and respond to vulnerabilities and incidents.
• Conduct risk assessments and develop strategies to mitigate identified risks.
• Collaborate with IT teams to ensure the integration of security measures into all infrastructure projects.
• Develop and implement security policies, standards, and procedures to protect sensitive information.
• Provide technical support and guidance on cybersecurity tools and technologies.
• Stay updated on emerging cybersecurity threats and industry trends to enhance the organization’s security posture.
• Develop and refine documentation to gain and maintain DoD accreditation for the systems on the program.
• Participate in the Change Control Board (CCB) process for supporting all major engineering milestones and decisions for the program.

• Bachelor’s Degree with 12+ years of experience or Master’s Degree with 10+ years of experience (equivalent industry experience may be considered).
• US Citizen with an active Top Secret clearance and the ability to obtain and maintain SCI before start date.
• Proven experience in cybersecurity engineering or related roles.
• Hands‑on experience with configuring cybersecurity tools for enterprise use, including Splunk (Enterprise Security, SOAR, UBA), HBSS/ESS (Trellix ePO), ACAS (Tenable/Nessus), and Solar Winds Observability.
• Familiarity with DoD cybersecurity frameworks such as the Risk Management Framework (RMF).
• Strong knowledge of network security, firewalls, intrusion detection/prevention systems, and encryption technologies.
• Excellent problem‑solving skills and attention to detail.
• Strong communication skills for collaborating with technical and non‑technical stakeholders.
• DoD 8140 advanced certifications (CISM, CISSP, ISSAP).

• Project Management Certifications (PMP, ISSMP, etc.).
• Microsoft Azure Certifications (AZ‑500, AZ‑305, etc.).
• Experience securing cloud‑based infrastructure and cloud security.
• Experience with Azure Stack Hub/Azure Local family of products.
• Experience securing classified DoD networks such as SIPR or JWICS.
• Familiarity with incident response processes and tools.
• Experience with scripting or automation tools for security tasks.
• Ability to work in a dynamic environment…