Description Leidos is seeking a
TS/SCI with Polygraph cleared Information Systems Security Officer (ISSO) to support our information assurance and cybersecurity mission. The ISSO will be responsible for ensuring the implementation, maintenance, and compliance of security controls for our critical information systems.
- Provide consulting to Agencies on Requests for Service for the design, development, and deployment of Ongoing Assessment, Ongoing Authorization, and other Information Assurance (IA) initiatives.
- Ensure system security measures comply with applicable government policies
- Ensure that system security requirements are addressed throughout the project and system lifecycle.
- Review system security A&A package submissions for consistency, completeness and traceability ensuring compliance
- Develop, maintain, and facilitate the appropriate closure of POA&Ms and facilitate with the Agency-designated security Point of Contact (PoC)/ISSO any related remediation activities
- Ensure the development, documentation, and presentation of IS security education, awareness, and training activities for users and others, as appropriate
- Ability to manage multiple high visibility security projects and adjust to quick shifts in customer priorities while meeting all mission requirements
- Familiarity with controlling, labeling, virus scanning, and appropriately transferring data (uploading/downloading)between information systems at varying classification levels;
- Performing Nessus scans and other vulnerability tools and interpreting the results
- Provide support for daily inquiries, data calls and information collection. As well as maintaining status documents and project tracking.
Key Responsibilities- Consulting agencies on Requests for Service for the design, development, and deployment of Ongoing Assessment, Ongoing Authorization, and other Information Assurance (IA) initiatives.
- Performing continuous monitoring to enforce client security policy and procedures and creating processes that will provide increased visibility to system owners on impacts to the security posture of systems.
- Monitoring configuration management changes and assessing the impact of modifications and vulnerabilities for each system.
- Ensuring that system security requirements are addressed throughout the project and system lifecycle.
- Ensuring effective controls and processes are in place and working effectively to maintain a strong system security posture.
- Performing vulnerability and risk assessment analyses to support Assessment & Authorization (A&A) activities.
- Reviewing system security A&A package submissions for compliance, consistency, completeness, and traceability.
- Developing, maintaining, and closing POA&Ms while driving remediation efforts alongside the designated security point of contact.
- Auditing and monitoring incident response communications, and other key operational processes for adherence to mandated security policies.
- Ensuring the development, documentation, and presentation of information system security education, awareness, and training activities for users and others.
- Managing multiple high-visibility security projects and adjusting to quick shifts in customer priorities while meeting all mission requirements.
- Controlling, labeling, virus scanning, and appropriately transferring data (uploading/downloading) between information systems at varying classification levels.
- Performing vulnerability assessment scans and interpreting the results.
Qualifications- Security+ strongly desired
- GSEC Security Essentials
- GIAC Information Security Fundamentals
Requirements:- Must currently possess an active TS/SCI with Polygraph in order to be considered. Candidates without this level clearance will not be considered.
- BA or BS degree 8+ years of experience, or Master's Degree and 5 years of experience, in a broad range of assignments with 4 years focused on security and/or ISSO work.
- CISSP
- Will substitute additional experience and certifications in lieu of degree.
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:November 12, 2026
For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
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. 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.
About LeidosLeidos 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 $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.
Pay and BenefitsPay 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 at www.leidos.com/careers/pay-benefits.
Securing Your DataBeware of fake employment opportunities using Leidos' name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system - never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com.
If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.
Commitment to Non-DiscriminationAll 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.
