DescriptionJoin a Mission-Driven Team at Leidos:At Leidos, we deliver cutting-edge solutions through the dedication of our diverse and talented workforce. United by a shared commitment to our customers’ success, we empower our teams, support our communities, and operate sustainably. Guided by our Mission, Vision, and Values, we strive to always do the right thing—for our customers, our people, and our world.Ready for Your Next Career Challenge?We’re seeking a dynamic and experienced Information System Security Officer (ISSO) to support a high-impact program providing Information Assurance services to the U.S. Space Force. This role offers a unique opportunity to contribute to a critical national defense mission while working in a fast-paced, innovative IT environment.This position reports directly to the Program Manager.Key Responsibilities:Collaborate daily with the ISSM to provide expert cybersecurity guidance and recommendationsOversee classified processing tasks, ensuring compliance with established standardsConduct system audits and execute Continuous Monitoring (ConMon) activitiesLead and support the Risk Management Framework (RMF) authorization process, including development and maintenance of the Body of Evidence (BoE)Manage Configuration Management (CM) activities for hardware, software, firmware, and security-relevant functionsAnalyze vulnerability scans, implement DISA STIGs, and ensure secure system configurationsInterpret and apply DoD cybersecurity policies and proceduresReview and recommend remediation actions for Plan of Action and Milestones (POA&M) to mitigate risks and achieve Authorization to Operate (ATO)Basic Qualifications:Bachelor’s degree and 8+ years of relevant experience (additional experience, training, and/or certifications may substitute degree requirement)U.S. Citizenship; Currently possess an Active DoD Top Secret clearance with SCI eligibilityProficiency with DCSA eMASS, SCAP, ACAS, and Nessus Network Monitor (NNM)Strong understanding of RMF, SDLC, and A&A documentation developmentExperience with DCSA and Special Access Program (SAP) A&A processesAbility to apply government security regulations (FIPS, NIST, NISPOM, JSIG, ICDs) to information systemsExpertise in securing Windows, Linux, and UNIX environments using Active Directory and Group PolicyExceptional analytical, problem-solving, and communication skillsStrong attention to detail and organizational disciplineProven ability to manage multiple priorities independentlyMust obtain DoDD 8140 (DoD 8570.01) IAT II certification within 6 months of hirePreferred Qualifications:Experience with the implementation or both DoDD 8570 and DoDI 8140 certification processesExperience supporting DoD customers and mission requirementsHands-on experience with Trellix modules and SIEM solutionsKnowledge of DCSA XACTA and CORE platformsRMF package development for NIPR, SIPR, and JWICS networksUnderstanding of DoD military standards and operational environmentsAbility to adapt to evolving mission needs and technical landscapesThis role is ideal for cybersecurity professionals who thrive in mission-critical environments and are passionate about protecting national assets. If you’re ready to make a meaningful impact, we’d love to hear from you.EIO 2024At Leidos, we don’t want someone who "fits the mold"—we want someone who melts it down and builds something better. This is a role for the restless, the over-caffeinated, the ones who ask, “what’s next?” before the dust settles on “what’s now.”If you’re already scheming step 20 while everyone else is still debating step 2… good. You’ll fit right in.Original Posting: August 26, 2025For 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 $104,650.00 - $189,175.00The 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.
