Information Systems Security Officer(ISSO)

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

Information Systems Security Officer (ISSO)

Leidos – Cyber & Analytics Business Area, Key Management & Analytics Division – requires an experienced ISSO to support critical national‑security missions. This full‑time, on‑site role protects systems and information for our customers, ensuring compliance, risk management, and operational security posture for systems that handle classified information.

Key Responsibilities

• Support senior ISSOs in implementing and enforcing information systems security policies, standards, and methodologies.
• Plan and coordinate IT security programs and policies and help develop system security policies that ensure compliance.
• Support the Information System Security Manager (ISSM) in maintaining the appropriate operational Information Assurance (IA) posture.
• Evaluate security solutions to ensure they meet requirements for processing classified information.
• Perform vulnerability and risk‑assessment analysis in support of certification and accreditation activities.
• Develop, maintain, and update security documentation, including System Security Plans (SSPs), Risk Assessment Reports, Certification and Accreditation (C&A) packages, System Requirements Traceability Matrices (SRTMs), and other IA documentation.
• Develop and maintain C&A documentation in accordance with applicable ODNI and DoD policies and support obtaining C&A for information systems under your purview.
• Support security‑authorization activities in accordance with the National Institute of Standards and Technology Risk Management Framework (NIST RMF).
• Manage and control system changes, evaluate their security impact, and provide Configuration Management (CM) for security‑relevant software, hardware, and firmware.
• Maintain records for workstations, servers, routers, firewalls, intelligent hubs, network switches, and other system components, including system upgrades.
• Support day‑to‑day security operations and administer user identification and authentication mechanisms for Information Systems.
• Support customer transition to ServiceNow (SNOW) and serve as the Approval Authority for Information Systems under your control, as required by the program.

Qualifications

• Bachelor's degree in Computer Science or a related discipline from an accredited college or university, or 4 years of direct experience as an ISSO substituted.
• Ten (10) years of experience as an ISSO on programs and contracts of similar scope, type, and complexity.
• Experience in at least two (2) of the following areas: Current security tools; Hardware/software security implementation; Communication protocols; Encryption techniques and tools.
• DoD 8570 Information Assurance Management (IAM) LevelI certification or higher.
• Demonstrated experience with information‑system security policies, standards, methodologies, security documentation, and day‑to‑day security operations.
• Experience assessing system changes and their potential security impact.
• Experience supporting security authorization, certification and accreditation, and information‑assurance activities.
• Active TS/SCI clearance with polygraph.
• Ability to work full‑time on site in a secure environment.

Benefits

• Paid Time Off
• 11 paid holidays
• 401(k) with a 6% company match and immediate vesting
• Employee Stock Purchase Plan
• Technical upskilling and professional‑development opportunities
• Education and training support
• Paid parental leave
• Additional health, wellness, and employee benefits

Pay Range

Pay Range: $107,900.00–$195,050.00. The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Compensation factors considered include responsibilities, education, experience, knowledge, skills, and abilities, as well as internal equity and market data.

Posting Information

Original Posting: August12,2026

Data Security Statement

Leidos will never ask you to provide payment‑related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment‑related information or any other personal information, please report the email to [e-mail].

Equal Opportunity Statement

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.

Company Information

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $17.2billion for the fiscal year ended January2,2026.

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here.