On‑Site ISSO for National Security IT

Leidos LLC; Maryland; On-site; USD 108,000 - 195,000; Full time

Benefits offered by this job

Paid Time Off

11 paid holidays

401(k) with company match

Employee Stock Purchase Plan

Technical upskilling and professional‑

Education and training support

Paid parental leave

Health, wellness and employee benefits

Job summary

Leidos seeks an experienced Information Systems Security Officer (ISSO) to support critical national-security missions in a full-time, on-site capacity. The role focuses on protecting systems handling classified information, ensuring compliance, risk management, and a strong security posture.

Key duties include implementing security policies, coordinating RMF activities, developing SSPs and C&A artifacts, and supporting certification processes.

Qualifications

• Bachelor's degree or 4 years ISSO experience required.
• DoD IAM Level I cert or higher required.

Responsibilities

• Support senior ISSOs in enforcing information systems security policies and standards.
• Plan and coordinate IT security programs and policies to ensure compliance.
• Support the ISSM in maintaining the operational IA posture.
• Evaluate security solutions for processing classified information.
• Perform vulnerability and risk assessments in support of C&A activities.
• Develop and maintain SSPs, Risk Assessment Reports, C&A packages, and other IA documentation.
• Support CNSS/NIST RMF security-authorization activities.
• Manage and control system changes and provide CM for security-relevant components.
• Maintain records for devices and networks, including upgrades.
• Support day-to-day security operations and user authentication.
• Assist transition to ServiceNow (SNOW) and act as Approval Authority as needed.

Skills

Security policy implementation

Vulnerability management

Risk assessment

RMF/NIST compliance

Information assurance

TS/SCI clearance with polygraph

Education

Bachelor's degree in Computer Science or related discipline

4 years direct ISSO experience substitute

DoD 8570 IAM Level I certification or higher

Tools

Security documentation tooling

Job description

Leidos seeks an experienced Information Systems Security Officer (ISSO) to support critical national-security missions in a full-time, on-site capacity. The role focuses on protecting systems handling classified information, ensuring compliance, risk management, and a strong security posture.

Key duties include implementing security policies, coordinating RMF activities, developing SSPs and C&A artifacts, and supporting certification processes.