Senior Systems Administrator

Leidos LLC; Fort Meade (MD); On-site; USD 92,000 - 167,000; Full time

Benefits offered by this job

Paid Time Off

11 holidays

401K with company match

Flexible schedules

Education and training support

Parental paid leave

Job summary

Leidos is seeking a Systems Administrator to support the Intelligence Sector's Cyber & Analytics Business Area (CABA). You will administer Linux/Windows systems, maintain core infrastructure, and ensure security compliance in a high-trust DoD environment.

Responsibilities include virtualization, containerization, identity management, and network/storage administration to keep mission systems available and secure.

Qualifications

• Ten years of experience as a System Administrator on similar scope programs.
• Bachelor's degree in a technical discipline from an accredited college/university; five additional years may substitute for the degree.

Responsibilities

• Administer, maintain, and troubleshoot Linux and Windows systems.
• Configure and manage core enclave infrastructure and services (DHCP, DNS, domain services, identity).
• Deploy and support virtualized/ containerized environments; manage compute, storage, networking resources.
• Maintain security in line with SSPs and DoD cybersecurity requirements.
• Support classified environments and ensure system reliability and mission readiness.
• Assist with encryption, PKI, and certificate management as part of security posture.

Skills

System Admin

Linux

Windows

AWS

Virtualization

Docker

Kubernetes

Ansible

Python

PowerShell

TCP/IP

DNS

Security Hardening

PKI/TLS

Education

Bachelor's degree in a technical discipline

Tools

KVM

Proxmox

VMware

Docker

Podman

FreeIPA

Active Directory

LDAP

Job description

Leidos has a new and exciting opportunity for a Systems Administrator 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. 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!

Program Summary

Leidos delivers advanced technical, engineering, and system administration expertise in direct support of a high-priority foreign engagement mission. This established effort leverages solutions, alongside tailored engineering approaches, to enable mission-critical capabilities within a secure, high-trust environment. The program supports a complex and evolving mission where experienced cleared professionals operate side-by-side with the customer to architect, integrate, modernize, and optimize systems that directly drive operational outcomes.

Key Responsibilities

System Administration & Troubleshooting: Administer, maintain, and troubleshoot Linux and Windows systems, diagnosing and resolving technical issues ranging from the operating system through the application layer. Linux Server Administration: Install, configure, patch, upgrade, secure, and maintain Linux servers, including RHEL, Rocky Linux, CentOS, or comparable enterprise Linux distributions. Core Infrastructure Services: Configure and maintain core enclave infrastructure services, including DHCP, DNS, domain services, identity management, authentication, and related network services. Virtualization & Infrastructure Support: Deploy and support virtualized and/or containerized environments while managing supporting infrastructure, including compute, storage, networking, and system resources. Network & Storage Administration: Support storage platforms, network connectivity, system interfaces, and associated infrastructure; troubleshoot performance, availability, and connectivity issues across complex environments. Security & Compliance: Maintain systems in accordance with applicable System Security Plans (SSPs) and secure administration requirements, including Secure the Enterprise (STE)/Secure the Network (STN) activities. Configure, monitor, and maintain security tools required to support DoD networks and cybersecurity requirements. Classified Environment Support: Provide day-to-day administration and technical support within classified operational environments, maintaining secure and reliable mixed Linux/Windows environments while ensuring systems remain operational, compliant, and mission ready.

Required Qualifications

Ten (10) years of experience as a System Administrator supporting programs and contracts of similar scope, type, and complexity. Bachelor's degree in a technical discipline from an accredited college or university. Five (5) additional years of System Administration experience may be substituted for the bachelor's degree.

Desired Skills

Experience administering or supporting AWS cloud environments. Experience with virtualization platforms such as KVM, Proxmox, VMware, or similar technologies. Experience with enterprise identity and authentication technologies such as FreeIPA, Centrify, LDAP, and Active Directory. Knowledge of PKI, TLS, certificates, encryption, and other cryptographic technologies. Experience with container technologies such as Docker, Podman, Kubernetes, or comparable platforms. Familiarity with automation and configuration management tools such as Ansible, Bash, Python, or PowerShell. Strong understanding of TCP/IP networking, DNS, routing, firewalls, system hardening, and secure network architecture. Ability to independently troubleshoot complex infrastructure issues, identify root causes, and implement sustainable technical solutions.

Pay Range

Pay Range: Pay Range $92,300.00 - $166,850.00

Original Posting: August 27, 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.

Leidos

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 $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit www.Leidos.com.

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 [e-mail].

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.