Principal Systems Engineer/SME

The Principal Systems Engineer serves as a senior technical authority leading the design, integration, testing, deployment, training, and sustainment of packet-based hardware and software systems utilizing Commercial Off-The-Shelf (COTS) and Government Off-The-Shelf (GOTS) products. This role drives end-to-end systems integration across hardware, software, and network components to ensure seamless interoperability, operational performance, and mission success across a complex technical landscape. Primary Responsibilities

• Lead the design, integration, testing, deployment, training, and sustainment of packet-based hardware and software systems leveraging COTS and GOTS products.
• Direct end-to-end systems integration across hardware, software, and network components to ensure interoperability, scalability, and optimized performance.
• Develop and execute system integration plans, validation and verification procedures, and deployment strategies to ensure operational readiness and requirements compliance.
• Develop, update, and maintain BASH and PERL scripts to automate system setup, configuration, and maintenance of core servers and clustered computing environments.
• Implement automation initiatives and process improvements to enhance system reliability, efficiency, and long-term maintainability.
• Provide senior-level technical leadership, advanced troubleshooting, and lifecycle sustainment support, including system upgrades, patching, and performance tuning.
• Deliver training and technical guidance to administrators, operators, and cross-functional engineering teams while ensuring adherence to security and configuration management standards.

• Minimum of twenty (20) years of Systems Engineering experience on programs/contracts of similar scope, type, and complexity.
• Bachelor's degree in a technical discipline related to Information Technology, Systems Engineering, Computer Science, or a related field. Five (5) additional years of Systems Engineering experience may be substituted in lieu of a degree.
• Security Clearance requirement: Active TS/SCI with polygraph clearance.

At Leidos, we offer competitive benefits, including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and much more. Join us and make a difference in National Security!, 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 .

Leidos has a new and exciting opportunity for a Principal Systems Engineer in our Intelligence Sector's Cyber & Analytics Business Area (CABA). Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management., 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 .