​​Information System Security Engineer​

Description Are you ready to join Leidos all-star team? Through training, teamwork, and exposure to challenging technical work, let Leidos show how to accelerate your career path.The Decision Advantage Business Area at Leidos has an opening for an experienced Information System Security Engineer (ISSE) to work in our Orlando, FL office. Department of the Air Force (DAF) Battle Network and supporting infrastructure. In this mission we support the Department of the Air Force (DAF) to field and operate the customer's Digital Infrastructure. The ISSE will be involved in day-to-day activities and strategic long-term maturation of complex systems. Details are as follows:  ​​  ​​Primary Responsibilities  ​​ The ISSE will be responsible for monitoring TEMPEST certifications and the development of an RMF Assess and Authorize (A&A) package, including detailing controls, a system scanning plan, POA&M maintenance, and a Body of Evidence validating control implementation. High Level tasking for this team will include the following:   ​​Plan and detail the security of a complex mission-critical defense network per the DoD RMF.​Plan, document, and achieve system Interim Authorization to Test (IATT), Interim Authorization to Operate (IATO), Authorization to Operate (ATO), Authorization to Connect (ATC), Interconnection Security Agreement (ISA) and other approvals as required by the Government Authorizing Official.​Perform and/or review security assessments of computing environments to identify points of vulnerability, non- compliance with established Cybersecurity standards and regulations and recommend mitigation strategies.​Validate and verify system security requirements definitions and analysis.​Assist architects and systems developers in the identification and implementation of appropriate information security functionality to ensure uniform application of security policy and solutions.​Assess and develop mitigations for Security Compartmented Information (SCI) system security threats/risks throughout the program life cycle.​Contribute to the security planning, assessment, risk analysis, risk management, certification and awareness activities for SCI systems and Classified networking operations.  ​​  ​​Basic Qualifications  Bachelors Degree and 8 to 12 years of relative experience. ​Active and current Secret clearance with the ability to obtain a and maintain TS/SCI clearance. ​Achievement of any DoD 8140 or DoD 8570 baseline certification within 6 months of start of work.​Experience with Air Force Intelligence Community NIST Risk Management Framework .Experience with Intelligence Communitive Directive 503.​Experience with Cross-domain or segmented architectures.Experience with NIST SP 800-53 control development and documentation.​Experience operating within Sensitive Compartmented Information Facility (SCIF) and Classified networks.​​Preferred Qualifications.   ​​Experience working with DoD security Assessment and Authorization.​Experience with eMASS, Jira, and Confluence.​Experience developing and maintaining authorization Body of Evidence.​Experience with Tenable Nessus, Security Onion SIEM solution. Understanding of TEMPEST requirements and assessments  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:February 9, 2026For 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 -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 .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 /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 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 [email protected] 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.

Created: 2026-02-09