Information System Security Officer

Description

Summary: The Information System Security Officer (ISSO) supports security requirements, establishing standards, conducting reviews, assessing risks, and ensuring proper user access. Highlights: 1. Serve as Subject Matter Expert (SME) in Information Assurance 2. Oversee day-to-day information system security operations 3. Develop innovative solutions to meet changing security requirements Apply Now Description Leidos' Corpore Informion Security Office (CISO), reporting through the Digital Modernizion Sector, is seeking an Informion System Security Officer (ISSO) to support our Chantilly, VA office. The Informion System Security Officer (ISSO) is the primary Informion Assurance (IA) support responsible for the management and technical administrion of the Informion System (IS) in accordance with internal and external security requirements.  You will be responsible for establishing and maintaining security standards and procedures for assigned informion systems and environments. You will conduct periodic reviews to ensure compliance with applicable industry standards and government policies, assess security risks, coordine with personnel to obtain and maintain Authority to Opere (ATO), and ensure approprie user access on classified and sensitive systems. In this role you will oversee day-to-day informion system security operions our Chantilly locion, resolve complex problems, and develop innovive solutions to meet changing security requirements. You will serve as the Subject Mter Expert (SME) within the Informion Assurance technical domain. To be successful, you must demonstre the ability to work independently as well as with a team of analysts trained in operions research, mhemics, and other skills. You should also be adaptable to diverse office situions, procedures and demands. Locion: All work will be performed onsite our Chantilly, VA office. Clearance: You must currently hold an active Top Secret/SCI with Polygraph clearance to qualify for this role. Primary Responsibilities Perform continuous upkeep, monitoring, analysis, and response to Informion System, network and security events. Document compliance activities in accordance with the governing authority approved authorizion package. Develop procedures and documention to ensure compliance with Configurion Management (CM) for security relevant IS software, hardware, and firmware. Ensure systems are opered, maintained, and disposed of in accordance with the governing authority approved authorizion package and customer directives. Ensure records are maintained for workstions, servers, software, routers, firewalls, network switches, and other relevant hardware/equipment throughout the informion system's life cycle. Evalue proposed changes or additions to the informion system and advises senior site leadership of security relevance. Conduct security IS Briefings and training. Mentor other engineers in the art of cybersecurity and secure software development practices. Participe in internal/external security audits/inspections; performs risk assessments and Continuous Monitoring. Lead investigions into computer security violions and incidents, reporting as necessary to both the Facility Security and Senior Program Managers. Ensure proper protection and / or corrective measures have been taken when an incident or vulnerability has been discovered. Work with the Facility Security Officer (FSO) and CPSOs developing, implements and manages a formal Informion Security / Informion Systems Security Program. Develop, implement and enforce Informion Security Policies and Procedures. Author, review and upde IS Authorizion documention (Body of Evidence) to support IS Assessment and Authorizion activities. Basic Qualificions Bachelor's degree and 8 – 12 years reled experience in Informion Systems, Computer Science or reled field or a Master’s with 6 – 10 years of reled experience. Additional relevant experience, training, and / or certificion may be considered in lieu of degree. Currently hold active TS/SCI with Polygraph clearance Hold current DoD 8140 IAT II Certificion or higher (minimum Security +). Detailed understanding of the Risk Management Framework (RMF), NIST, ICD, and CNSS standards. Familiarity with network technologies (LAN & WAN) and best practices within a classified environment to include crypto and key management. Working knowledge with Microsoft Windows opering systems (workstion & server), Linux, and system virtualizion (multiple hypervisors) in a secure network environment. Experience with compliance scanning tools (e.g. SCAP) and vulnerability scanning tools (e.g. ACAS/NESSUS). Hands on experience with DISA Security Technical Implemention Guide (STIG) implemention and management. Experience using Splunk or other event ghering software. Must be able to work in a constantly changing regulory environment with short-, mid-, and long-term timelines for remediing any non-compliance. Must be able to work well within a team environment and able to adapt quickly to change. Demonstre strong writing and verbal presention skills. Experience with eMass package submittals, POA&M management and Document SOP updes. Preferred Qualificions DoD IS knowledge and experience. Security hardening automion experience. Microsoft OS Certificion (MCSE Win 11 or other). Linux certificion (RHCSA, CompTIA Linux, LCFS/LCFE, etc.). Understanding of Sensitive Compartmented Informion Facility (SCIF) standards. Strong knowledge vulnerability/quality scanning tools. Knowledge of agile development processes and DevOps tools such as Jira, Bitbucket, Confluence. Knowledge of SNOW navigion for IC customers. Additional desired certificions include CCNA, CISSP, MCSE, and/or SANS GIAC. If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the stus 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 step 30 — and moving faster than anyone else dares. Original Posting: April 13, 2026 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipes th this job requisition will remain open for least 3 days with an anticiped close de of no earlier than 3 days after the original posting de 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 compension or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, educion, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market da, applicable bargaining agreement (if any), or other law. About Leidos Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovions. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximely $16.7 billion for the fiscal year ended January 3, 2025. For more informion, visit www.Leidos.com. Pay and Benefits Pay and benefits are fundamental to any career decision. Th's why we craft compension packages th reflect the importance of the work we do for our customers. Employment benefits include competitive compension, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available www.leidos.com/careers/pay-benefits. Securing Your Da Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment-reled informion during any part of the employment applicion 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 communice with you through emails th are genered by the Leidos.com automed system – never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhsApp, Telegram, etc. If you received an email purporting to be from Leidos th asks for payment-reled informion or any other personal informion (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediely by emailing us 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-Discriminion All qualified applicants will receive considerion for employment without regard to sex, race, ethnicity, age, nional origin, citizenship, religion, physical or mental disability, medical condition, genetic informion, pregnancy, family structure, marital stus, ancestry, domestic partner stus, sexual oriention, gender identity or expression, veteran or military stus, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws. Apply Now