Senior Cloud Security Admin — AWS DoD, Hybrid

Leidos; Hyattsville (MD); Hybrid; USD 120,000 - 160,000; Full time

Job summary

Leidos is seeking a Cloud Security Administrator with senior-level RHEL experience to secure DoD cloud environments and support RMF/ATO processes. The role focuses on managing security controls in AWS, coordinating remediation, and maintaining continuous compliance across CSSP subscriber environments.

Location: Adelphi, MD, Hybrid (3 days onsite). Active Secret clearance required at start with TS/SCI for the role. Strong collaboration with cloud engineers and cybersecurity teams is essential.

Qualifications

• 8+ years of relevant experience or 4+ with master's.
• Hands-on AWS security controls administration.
• Experience with vulnerability management and remediation tracking.
• RHEL systems administration in production.
• Familiarity with RMF/ATO, NIST SP 800-53, and DISA STIG.
• DoD 8140 qualification requirements at start.

Responsibilities

• Administer, monitor, and maintain cloud security controls across AWS 2.0 and CSSP subscriber environments.
• Diagnose and resolve Linux OS, service, storage, networking, authentication, and application issues.
• Identify, assess, track, and coordinate remediation of cloud vulnerabilities and misconfigurations.
• Manage AWS security capabilities including IAM, CloudTrail, CloudWatch, Security Hub, GuardDuty, KMS, and VPC controls.
• Support RMF, ATO, and continuous monitoring through security assessments and evidence documentation.
• Conduct security configuration reviews across AWS resources, Linux/Windows systems, and cloud infrastructure.
• Onboard CSSP subscribers into centralized logging and vulnerability management.
• Coordinate security patching, access reviews, change management, and incident response.

Skills

AWS security

RHEL administration

Vulnerability management

Ansible automation

RMF/ATO

NIST SP 800-53

Security monitoring

DoD 8140 awareness

Communication skills

Education

Bachelor's degree

Master's degree

Tools

Ansible

AWS IAM

CloudTrail

CloudWatch

Security Hub

GuardDuty

KMS

VPC

Job description

Leidos is seeking a Cloud Security Administrator with senior-level RHEL experience to secure DoD cloud environments and support RMF/ATO processes. The role focuses on managing security controls in AWS, coordinating remediation, and maintaining continuous compliance across CSSP subscriber environments.

Location: Adelphi, MD, Hybrid (3 days onsite). Active Secret clearance required at start with TS/SCI for the role. Strong collaboration with cloud engineers and cybersecurity teams is essential.