Leidos has a new and exciting opportunity for a Principal Systems Engineer in our National Security Sector's (NSS) 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. 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! Are you seeking a new and challenging position supporting a complex Program for the Warfighter, which implements the latest technology? Well, look no further! This is an exciting time to contribute to a mission-critical program with lasting impactful results. Leidos is currently looking to add a Principal Systems Engineer (SE-3) to a growing task. The SE will work closely with the team of software developers, Subject Matter Experts, and analysts to perform requirements derivation and refinement. The candidate must be a proactive, self-starter with significant technical leadership experience and excellent communication skills.