Job Description

Information System Security Officer (ISSO)

White Sands Missile Range, NM

Leidos has an exciting opportunity for an Information System Security Officer (ISSO) employee to join our team supporting the Naval Surface Warfare Center Port Hueneme Division-Detachment White Sands (NSWC PHD) in White Sands Missile Range, NM.

Primary Responsibilities

• Assist in the cybersecurity tasking for Special Security Office (SSO) program under NSWC Port Hueneme Division (PHD) cognizance.
• Assist with Shore-based Information Technology (IT) infrastructure operations and command functions to include facilities, finance and staff administration support.
• Assist in the program management of cyber related tasking, monitoring and reporting requirements associated with specific taskings.
• Support internal cyber and management operations, which include staff briefings, teleconferences, program/project evaluation, project liaison and project management assistance.
• Aid in development and detailed documentation of classified network requirements, system security controls, audit readiness, security processes and develop briefings, and compliance with evolving DoD cybersecurity directives.
• Provide certification and accreditation (C&A) technical support and authorization to operate (ATO) technical services in accordance with DoD 8510.01 Risk Management Framework (RMF) Process Guide for IT or current cybersecurity policy.
• Provide C&A and ATO support for IA technical integration to NSWC PHD SSO to ensure proper accreditation of systems and applications.

Basic Qualifications

• Bachelor’s degree with 4+ years of experience. Additional experience may be considered in lieu of a degree.
• Active DoD 8570 IAT level II or higher certification such as CompTIA Security+ CE, ISC2 SSCP, SANS GSEC.
• Active Top Secret clearance and must meet eligibility requirements for access for SCI.
• 4+ years of cybersecurity experience.
• 3+ years of experience performing vulnerability scans using Assured Compliance Assessment Solution (ACAS) and STIG assessment tools such as Evaluate-STIG or SCAP.
• Familiarity and experience with the Department of Defense (DoD), Defense Information Security Agency (DISA), Naval Network Warfare Command (NNWC), Fleet Cyber Command (FCC), DoDIIS, and tools, systems, and reporting mechanisms and requirements for certification and accreditation (C&A).
• Experience developing and reviewing security concept of operations, systems security plans, security risk assessments, plan of action and milestones (POA&M), contingency plans, configuration management plans and processing artifacts in XACTA or eMASS.
• Motivated self-starter with strong written and verbal communication skills, and the ability to create complex technical reports on analytic findings.

Preferred Qualifications

• DoD 8570 IAM certification such as SANS GSLC, ISACA CISM, or ISC2 CISSP.
• In-depth understanding of Committee on National Security Systems (CNSS), NIST 800 Series Special Publications, Joint Special Access Program Implementation Guide (JSIG), and DoD Intelligence Information System Joint Security Implementation Guide (DJSIG).
• Proficient with one or more malware prevention tools such as HBSS or Microsoft Defender.
• In-depth knowledge of and operations of a security information event management (SIEM) system.
• Scripting and/or programming experience with Unix/Linux command line interfaces.
• COMSEC experience.

AMSOPP1

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting:

May 27, 2026

Pay Range:

Pay Range $87,100.00 - $157,450.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.