Systems Engineer

We are seeking an experienced to support a mission-critical secure enclave environment consisting of both physical and virtual infrastructure. This role supports Linux and Windows systems, network infrastructure, security compliance, and mission operations while ensuring the reliability, security, and availability of the environment.

The successful candidate will administer and maintain systems and network infrastructure, configure hardware and network devices, support firewalls, perform vulnerability remediation, manage backups and compliance activities, troubleshoot complex technical issues, and support secure data movement across the environment.

• Administer and maintain secure Linux (Red Hat) and Windows systems supporting mission operations.
• Configure, maintain, and troubleshoot physical and virtual network infrastructure and associated network devices.
• Install, configure, and support network hardware, firewalls, and supporting infrastructure.
• Perform system maintenance, software updates, patch management, backups, and security compliance activities.
• Conduct vulnerability scanning and assist with remediation efforts to maintain secure system operations.
• Manage user accounts and troubleshoot client/server and network connectivity issues.
• Support secure data management and data transfer activities across mission systems.
• Maintain system availability while supporting mission-critical infrastructure in a secure enclave environment.
• Collaborate with team members to troubleshoot operational issues and support evolving mission requirements.

• Bachelor’s degree with of relevant experience, candidates without bachelors degrees will require additional years of experience and will be considered on a case by case basis
• Experience administering Linux (Red Hat) and Windows operating systems.
• Experience supporting physical and virtual network infrastructure.
• Experience troubleshooting client/server environments and network connectivity issues.
• Experience with data management and secure data transfer.
• Knowledge of vulnerability management, system maintenance, patching, backups, and compliance activities.
• Understanding of STE/STN requirements.
• IAT Level II certification (Security+, CSA+, or equivalent).

• Active security clearance.

• Experience with Ansible automation.
• Experience with VMware virtualization technologies.
• Experience using GitLab.
• Experience with Quay.
• Knowledge LatteArt/Biscotti
• Experience supporting classified or mission-critical secure enclave environments.

has a new and exciting opportunity for an in our . 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 , we offer , 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.

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. July 16, 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 $87,100.00 - $157,450.00

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.

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 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 .