Operating Systems Test Engineer with Security Clearance

R-00194863 Description Position: Operating Systems Test Engineer Location: Orlando, FL Make an Impact with Leidos At Leidos, we deliver innovative solutions through the dedication of our diverse and talented teams. United by a shared commitment to our customers’ success, we empower our people, support our communities, and operate sustainably. Our Mission, Vision, and Values guide every aspect of our work, ensuring we do the right thing—for our customers, our people, and the world around us.

Thrive in a Mission‑Focused Environment The Leidos Defense Sector provides advanced systems, solutions, and services across land, sea, air, space, and cyberspace. From enterprise IT and large‑scale intelligence systems to cybersecurity, geospatial analytics, logistics, and training, we support some of the nation’s most critical defense missions. Our teams take on challenges where failure is not an option—and succeed. We are seeking an experienced Operating Systems Test Engineer to support our ABMS DI Network Manager (DINM) program located in Orlando, FL.

This role is part of a team supporting the Department of the Air Force’s Air Battle Management System and its associated digital infrastructure. This is an on-site role requiring daily presence at our Orlando, FL office. Primary Responsibilities

• Maintain and support the Digital Infrastructure Network Integration Lab (DI‑NIL) architecture and services, including RHEL, Windows, and various systems/appliances.
• Manage configurations, compliance enforcement, directory service integrations, and daily operational oversight.
• Conduct Verification & Validation (V&V) testing for all systems designed for the production network—from initial build through configuration and service delivery.
• Ensure all operating systems meet strict DoD compliance requirements and perform optimally, including patch, version upgrade testing, and deployment.
• Develop complete documentation of system builds, configurations, and process workflows to ensure consistency, repeatability, and auditability.
• Work directly with customers to configure required operating systems, establish appropriate access controls, and support a least‑privilege environment.
• Support additional DI‑NIL team efforts, including assisting personnel conducting system verification and validation across the Digital Infrastructure Network.

Basic Qualifications

• Bachelor’s degree with 8+ years of related experience Additional experience may be considered in lieu of a degree.
• US Citizen; Currently possessing an active DoD Secret clearance with ability to upgrade to a TS/SCI clearance upon hire.
• Possess DoD 8140 IAT Level II certification Security+
• Demonstrable knowledge of operating systems concepts and applying these concepts to Department of Defense programs
• Experience with Active Directory deployment/configuration, OU creation, and RBAC-driven security controls.
• Proven expertise with Linux/Unix systems (RHEL).
• Demonstrable experience in design review participation and providing customer centric input.
• Excellent written and verbal communication skills for collaboration across diverse technical and non-technical stakeholders.
• Demonstrated ability to participate in cross-functional planning and system integration activities.
• Ability to work effectively with individuals of varying technical backgrounds.
• Foundational knowledge of networking systems and interconnections.
• Experience with government system security testing (ACAS/Nessus) and remediation.
• Demonstrated ability to brief technical and non-technical customers.
• Understanding of networking principles and basic network troubleshooting from the systems perspective

Preferred Qualifications

• Master’s degree with 6+ years of relevant experience.
• Active TS/SCI clearance.
• Experience with ABMS or JADC2 initiatives.
• Mid-level networking knowledge.
• Minimum 4 years of DoD system security testing (ACAS/Nessus) and remediation.
• Experience designing and deploying networks.
• Experience with SAFe Agile frameworks and use of agile tools (e.g., Jira, Confluence).
• Prior support of Department of the Air Force programs.
• Experience working with complex multi-domain systems.
• Experience designing and validating Cloud, Edge Computing, and network architectures.
• Demonstrated knowledge of test automation and test result analysis.
• Experience developing test methodologies, test specifications, and executing integration, verification, and validation activities.
• Strong focus on customer satisfaction and maintaining Leidos’ positive brand reputation.

Ready to make an impact? Start your next career chapter with Leidos—apply today! DABAOPP1 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: October 20, 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 $92,300.00 - $166,850.00 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 Leidos Leidos 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 Benefits Pay 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 Data Beware 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 .

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-Discrimination All 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.