Full Description

The Decision Advantage Business Area at Leidos has an opening for an experienced Operating Systems Test Engineer 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 Operating Systems Test Engineer will be involved in day-to-day activities and strategic long-term maturation of complex systems. Details are as follows: Primary Responsibilities: The Test team within the Digital Infrastructure Network Integration Lab (DI-NIL) will be responsible for maintaining the DI-NIL architecture and services. There are levels of support needed throughout to include RHEL, Windows, and other systems and appliances to include structure and compliance configurations, integration with Active Directory for authentication, as well as day-to-day management and review of the architecture. All systems destined for operation on the production network will pass through the DI-NIL for V&V testing from the build through configuration to service delivery. This position will work with the team to ensure all operating systems meet the strict compliance required by DoD guidance as well as ensuring all system capabilities are configured for optimum performance for the underlying operating system. Full documentation of builds and configurations utilized within the environment are mandatory as well as process flow documentation to ensure all required tasks are documented and repeatable. The DI-NIL support effort will also include working with customers to ensure the needed operating systems are configured properly and access has been configured to allow a least privilege concept during stakeholder activities within the environment. Additional duties will include backing up other personnel in support of the DI-NIL effort which is focused on Verification and Validation for the Digital Infrastructure Network. Basic Qualifications Bachelor’s degree and 8+ years of prior relevant experience or master’s degree with 6+ years of prior relevant experience. Additional years will be considered in lieu of degree. Secret clearance with the ability to obtain a TS/SCI clearance. Demonstrable knowledge of operating systems concepts and applying these concepts to Department of Defense programs. Demonstrable experience in design review participation and providing customer centric input. Strong written and verbal communication skills to collaborate with customer representatives, domain experts, and other systems engineers in the development of complex DoD systems. Demonstrated ability to participate in cross-functional planning, coordination, and task execution situations involving the full spectrum of system integration activities. Ability to work well with people from many different disciplines with varying degrees of technical experience. Mid-level network understanding. Mid-level understanding of government systems security testing (ACAS/Nessus) and remediation – ability to discuss security issues and concerns. Demonstrated ability to brief technical and non-technical customers. Preferred Qualifications. 4 years of DoD-based system security testing (ACAS/Nessus) and remediation with the ability to discuss security issues and concerns. Prior experience designing and deploying networks. Prior experience with SAFe Agile implementation. Demonstrated experience with Agile program execution and using agile tools (e.g. Jira and Confluence). Prior experience support Department of the Air Force programs. Previous experience working on complex multi-domain systems. Experience with design and validation of Cloud and Edge Computing and Network. Demonstrable knowledge of test automation and test result analysis. Demonstrable experience in network topologies to validate functionality, performance, stability and scalability of features and products. Proven expertise in creating test methodologies and writing test specifications. Experience in Integration, test, verification, and validation 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, 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 - 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. Leidos Leidos is a Fortune 500® innovation company rapidly addressing the world's most vexing challenges in national security and health. The company's global workforce of 47,000 collaborates to create smarter technology solutions for customers in heavily regulated industries. Headquartered in Reston, Virginia, Leidos reported annual revenue of approximately $15.4 billion for the fiscal year ended December 29, 2023. For more information visit . 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 here. Securing Your Data Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to . Commitment and Diversity 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.