Classified Area System Administrator

Leidos; Huntsville (AL); On-site; USD 59,000 - 107,000; Full time

Job summary

Leidos is seeking an early career System Administrator to join the Corporate Information Security team in Huntsville, AL. The role focuses on Windows server and desktop administration, virtualization, and infrastructure support in a classified environment.

Required active Secret clearance with eligibility for Top Secret. Bachelor's degree and IAT II certification preferred, with DoD RMF familiarity and strong customer service skills.

Qualifications

• Bachelor’s Degree required or equivalent years of experience.
• Active Secret clearance; Top Secret eligibility desired.
• IAT Level II certification (Security+ CE, CCNA Security, CySA+, GICSP, GSEC, CND, SSCP).
• Experience managing multiple air-gapped lab systems in a dynamic environment.
• Familiarity with Risk Management Framework environments for Windows/Linux.

Responsibilities

• Set up and maintain Windows servers, desktops, and network devices; some Linux experience preferred.
• Document system configurations and baselines.
• Provide backup and recovery services while managing file systems and disk space.
• Utilize Hyper-V, VMware vSphere, and ESXi for virtualization.
• Handle on-site tickets and prioritize daily support tasks.
• Manage user accounts and access control in domain or stand-alone environments.
• Ensure proper marking, handling, and storage of classified materials.
• Troubleshoot Windows OS issues on servers and workstations.
• Lead or contribute to multiple projects as needed.

Skills

Secret clearance

Air-gapped labs

Risk Management Framework

Windows server administration

Desktop/server virtualization

Education

Bachelor’s Degree

IAT Level II certification

Tools

Hyper-V

VMware vSphere

ESXi

Job description

Leidos Corporate Information Security team, reporting through the Digital sector, is seeking an early career System Administrator to join our team. In this role, you’ll play a key part in contributing to hardware and software implementation and overall infrastructure support within a classified environment. You will be responsible for ensuring compliance with information assurance requirements, and guaranteeing continuity of operations.

What We Value:

We’re not just looking for technical expertise; we value a positive attitude, motivation to learn, collaborative nature, the ability to adapt to changing priorities, and a commitment to getting the job done. Our ideal candidate is a reliable troubleshooter, adept at handling multiple priorities, someone who is resourceful and able to cope with shifting demands. Whether working independently or collaboratively, you’re self-managed and customer focused.

Work Location: All work is to be performed onsite in our Huntsville, AL office.

Clearance: You must currently hold an active Secret clearance to qualify for consideration. You must also be eligible to obtain Top Secret clearance upon hire.

Primary Responsibilities:

• Set up and maintain Windows servers, desktops, and network devices; some Linux experience is highly preferred

• Embrace new technologies to meet evolving requirements.

• Contribute to hardware/software implementation, and overall infrastructure support.

• Document system configurations and baselines.

• Provide backup and recovery services while managing file systems and disk space.

• Utilize desktop and server virtualization within Hyper-V, VMWare vSphere and ESXI.

• Handle ticket load and prioritization of daily on-site support and troubleshooting.

• Work on multiple projects, either as a team member or occasionally leading a project .

• Manage user accounts and access control in a domain or stand-alone environment.

• Ensure the proper marking, handling, and storage of classified materials.

• Troubleshoot and repair Windows operating system issues on server and workstations.

Experience and Skills:

• Bachelor’s Degree and a minimum of two 2 years of System Administrator experience. Equivalent relevant years of experience and/or certifications may be considered in lieu of degree.

• Current Secret clearance with ability to obtain a Top-Secret clearance.

• DoD Directive 8570 / 8140 Information Assurance Technical (IAT) Level II certification. (Security+ CE, CCNA Security, CySA+, GICSP, GSEC, CND, SSCP)

• Experience managing multiple air-gapped laboratory based systems within a dynamic, demanding environment.

• Familiarity with Risk Management Framework environments and requirements for Windows and Linux systems.

• Experience with desktop and server virtualization within Hyper-V, VMWare vSphere and ESXI.

• Strong written and verbal communication skills in support of providing the highest level of customer service.

• Ability to interface effectively with security agencies, customers, and management.

Preferred Qualifications:

• Previous experience in a classified Collateral environment / SAP / SCI.

• System Administrator experience in a similarly sized organization.

• Understanding of network concepts, Type 1 encryption devices (e.g., TACLANE), and cybersecurity tools.

• Knowledge of securely configuring network equipment (switches and firewalls).

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.

Original Posting:

September 1, 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:

Pay Range $59,150.00 - $106,925.00

The Leidos pay range for this job level is a general guideline onlyand 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.