Senior Cybersecurity Architect

Leidos is seeking a Senior Cybersecurity Architect to deliver cybersecurity engineering and architecture support for an Air Force weapons system program at a DoD weapons system environment.

Responsibilities

• Develop and execute enterprise cybersecurity strategies aligned with DoD and Federal security guidance.
• Design and implement resilient security architectures to address modern cyber threats.
• Architect and implement secure cloud infrastructure across on-premises and cloud environments.
• Define and enforce cloud security policies, standards, and automation frameworks.
• Support Authorization to Operate (ATO) activities across multiple environments and classification levels.
• Integrate security controls into CI/CD pipelines and DevOps workflows.
• Support cloud identity and access management (ICAM), including encryption and key management systems.
• Configure, tune, and monitor enterprise security tools and platforms.
• Monitor network and system security to detect vulnerabilities and support incident response.
• Perform risk assessments and develop mitigation strategies for identified risks.
• Partner with IT teams to ensure security measures are integrated into infrastructure projects.
• Develop and implement security policies, standards, and procedures to protect sensitive information.
• Provide technical guidance and support for cybersecurity tools and technologies.
• Track emerging threats and industry trends to improve the organization’s security posture.
• Create and refine technical documentation to obtain and maintain DoD accreditation for program systems.
• Participate in the Change Control Board (CCB) process for major engineering milestones and decisions.

Requirements

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

Preferred Qualifications

• Project management certifications (PMP, ISSMP, etc.).
• Microsoft Azure certifications (AZ-500, AZ-305, etc.).
• Working knowledge of cloud security and securing cloud-based infrastructure.
• Experience with Azure Stack Hub/Azure Local.
• Experience securing classified DoD networks, including networks connected to 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 and adapt to changing priorities.
• Experience with Agile and DevSecOps.

Technologies

• Splunk (Enterprise Security, SOAR, UBA)
• HBSS/ESS (Trellix ePO)
• ACAS (Tenable/Nessus)
• SolarWinds Observability
• Risk Management Framework (RMF)
• CI/CD, DevOps
• Cloud identity and access management (ICAM)
• Encryption, key management systems
• Change Control Board (CCB)
• DoD accreditation

Benefits

• Health and Wellness programs
• Income Protection
• Paid Leave
• Retirement

Location: Lorton, VA (onsite)

Pay Range: USD 131,300 - 237,350 per yearly

Original Posting Date: July 31, 2026