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Arcfield Logo Arcfield · IT - Administration

Systems Administrator III

United States, Huntsville 75094.23 - 180450.32 USD / Year · Job Posted April 24, 2026
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Job Description

Arcfield is seeking an Systems Administrator III to provide support to computer systems and network infrastructure in a secure systems mission architecture. The qualified candidate will provide design, maintenance, sustainment, and enhancement support for the architecture in a classified and unclassified environment; ensure compliance with applicable information assurance requirements; and create and update relevant system documents.

Job Responsibility

  • Provide design, maintenance, sustainment, and enhancement support for the architecture in a classified and unclassified environment
  • Ensure compliance with applicable information assurance requirements
  • Create and update relevant system documents
  • Install, configure, and maintain Windows (Windows 11, Server 2019, or 2025) and Linux (Ubuntu, Red Hat Linux, CentOS) servers, desktops, and all network devices in accordance with all NIST 800-53A r4 and DISA STIG and SRG requirements
  • Evaluate and gain comprehension of new technologies to assist with new requirement implementation efforts
  • Use log aggregation technologies allowing for the collection and filtering of system logs and audit trails
  • Support software development environments that utilize commercial, GOTS, and custom tooling
  • Perform hardware/software installation and integration, and general infrastructure support
  • Prepare documentation related to system configurations and baselines
  • Provide backup and recovery services
  • manage file systems and disk space
  • Configure desktop and server virtualization within VMware vSphere and EXSi
  • Provide daily, on-site support for the operations/maintenance of information systems deployments in an air-gapped environment
  • Understand information systems architecture, perform installation and STIG hardening of Operating Systems
  • maintain within and across multiple classification levels
  • Configure and execute vulnerability scanning tools (Nessus), SCAP/STIG scans (SCC Tool, OpenSCAP, evaluateSTIG, etc.), and perform remediating steps based on findings
  • Administer Windows and Red Hat Linux in an offline or standalone environment
  • Perform User account and access control management (Active Directory, LDAP, User Access Control) in a domain or stand-alone environment
  • Perform proper marking, handling, and storage of classified materials
  • Additional duties as assigned
  • 25% Travel will be required

Requirements

  • Bachelor's degree in computer science, Information Systems Management, Network Engineering, or closely related discipline plus 5-7 years of experience, MS plus 3-5 years of experience, PhD plus 0-2 years of experience
  • Must possess a Secret Clearance
  • A minimum of two (2) years of experience as a System Administrator
  • DoD Directive 8570 / 8140 Information Assurance Technical (IAT) Level II certification (e.g., Security+ CE, CCNA Security, CySA+, GICSP, GSEC, CND, SSCP)

What we offer

  • Health Insurance
  • Life Insurance
  • Paid Time Off
  • Holiday Pay
  • Short Term and Long-Term Disability
  • Retirement and Savings
  • Learning and Development opportunities
  • wellness programs
  • other optional benefit elections
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