Systems Administrator III

Arcfield•Huntsville, AL

5h•Onsite

About The Position

Arcfield is seeking a 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.

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).

Responsibilities

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 duites as assigned.