Classified Area System Administrator

Koitecc Solutions; Huntsville, Northern (AL, KY); Hybrid; USD 59,000 - 107,000; Full time

Job summary

Leidos is seeking an early career System Administrator to join our Corporate Information Security team in Huntsville, AL. The role focuses on maintaining Windows servers, desktops, and network devices, with some Linux experience; virtualization with Hyper‑V and VMware ESXi is a key aspect to deliver reliable infrastructure.

Candidates must hold an active Secret clearance and be eligible for Top Secret. A DoD 8570/8140 IAT Level II certification is preferred.

Qualifications

• Bachelor’s Degree with 2+ years of System Administrator experience or equivalent certifications.
• Active Secret clearance with ability to obtain Top Secret.
• DoD 8570/8140 IAT Level II certification (Security+ CE, CCNA Security, CySA+, GICSP, GSEC, CND, SSCP).
• Experience managing multiple air-gapped laboratory-based systems in dynamic environments.
• Familiarity with Risk Management Framework for Windows and Linux systems.
• Experience with desktop and server virtualization (Hyper-V, VMware ESXi).
• Strong written and verbal communication for customer service.

Responsibilities

• Set up and maintain Windows servers, desktops, and network devices; some Linux experience preferred.
• Document system configurations and baselines.
• Provide backup/recovery and manage file systems and disk space.
• Utilize virtualization within Hyper-V and VMware ESXi.
• Handle on-site support tickets and troubleshooting.
• Manage user accounts and access control in domain or standalone environments.
• Ensure proper handling and storage of classified materials.

Skills

System administration

Windows Server

Linux

Hyper-V

VMware ESXi

Education

Bachelor’s degree

Tools

Active Directory

TACLANE

Networking switches

Firewalls

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).

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 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.

About 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 $16.7 billion for the fiscal year ended January 3, 2025. 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 at www.leidos.com/careers/pay-benefits.

Commitment to Non-Discrimination

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.