Leidos has a new and exciting opportunity for a Principal Linux 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. This is a unique opportunity to support a complex, mission-critical program for the Warfighter, implementing cutting-edge technologies with lasting impact. If you're a proactive self-starter with deep systems engineering experience and strong Linux administration skills, we want you on our team.