Senior ISSE: Cross‑Domain & Cloud Security Architect

Leidos; Reston (VA); On-site; USD 140,000 - 190,000; Full time

Job summary

Leidos invites experienced ISSE professionals to lead security architecture across unclassified, classified, and corporate networks. The role spans AWS multi-region, hybrid cloud, and CDS design to enable secure data sharing between agencies and enterprise systems.

The ideal candidate holds a TS/SCI clearance with poly, BS degree plus 4–8 years’ experience, and deep knowledge of RMF, NIST 800-53, and vendor tools like Kubernetes, Docker, VMware. Expect a dynamic, mission-focused environment.

Qualifications

• U.S. Citizenship is required.
• Active TS/SCI, or Top Secret clearance with SSBI, eligible for TS/SCI w/ poly.
• BS degree with 4–8 years of relevant experience; degree optional with experience.
• Deep understanding of security principles across unclassified and classified networks.
• Cloud security in AWS and cloud-native architectures across security levels.
• Experience interfacing with DTRA and DIA networks and assessment lifecycles.
• Experience with container platforms managed via Kubernetes and Docker.
• Cross Domain Solution technologies, data labeling, and secure transport is essential.

Responsibilities

• Design, integrate, test, and operate Cross Domain Solutions for secure data transfers.
• Engineer secure AWS architectures across GovCloud, commercial regions, and Secret/Top Secret areas.
• Coordinate security compliance across DTRA, DIA, and corporate infrastructures.
• Oversee secure deployment and integration of applications supporting government and corporate networks.
• Maintain SSPs and authorization artifacts in eMASS with NIST 800-53 controls.
• Lead vulnerability management including ACAS/Nessus, AWS Security Hub, Prisma Cloud.
• Liaise with Authorizing Officials and ISSOs to obtain and maintain Authority to Operate.

Skills

Security architecture

Cross Domain Solutions

Cloud security

Vulnerability management

RMF/Compliance

Agency liaison

Kubernetes

Docker

Education

BS degree

Tools

Kubernetes

Docker

VMware

Azure Virtual Desktop

Citrix

eMASS

Job description

Leidos invites experienced ISSE professionals to lead security architecture across unclassified, classified, and corporate networks. The role spans AWS multi-region, hybrid cloud, and CDS design to enable secure data sharing between agencies and enterprise systems.

The ideal candidate holds a TS/SCI clearance with poly, BS degree plus 4–8 years’ experience, and deep knowledge of RMF, NIST 800-53, and vendor tools like Kubernetes, Docker, VMware. Expect a dynamic, mission-focused environment.