System Administrator (Intermediate)

Agile Defense•Huntsville, AL

6d•Onsite

About The Position

The Intermediate Systems Administrator provides critical systems engineering, administration, and cybersecurity support for a multi-platform computing environment supporting a Department of Defense (DoD) government contract. The successful candidate will join a cohesive technical team responsible for the effective provisioning, installation, configuration, maintenance, and secure operations of physical and virtual system hardware, operating systems (Windows and/or Linux), and associated infrastructure enclaves. This role demands a balance of robust technical skills, adherence to strict federal security compliance guidelines, and the ability to solve moderately complex technical issues independently while collaborating with Cybersecurity and Software Engineering teams.

Requirements

Bachelorâ€™s Degree in Computer Science, Information Technology, Cybersecurity, or a related STEM field. Appropriate experience can be accepted in lieu of Degree.
A minimum of five (5) years of relevant systems administration experience.
Secret Clearance, Must Have Clearance to Start
IAT Level II Baseline Certification
Proven experience managing virtual environments (VMware ESXi, vSphere, or vCenter).
Strong working knowledge of Windows Server administration, Active Directory, and GPOs.
Hands-on experience administering Linux environments (specifically RHEL or Ubuntu).
Demonstrated experience with vulnerability scanners (ACAS, Nessus, SCAP Compliance Checker).
Familiarity with patch management software (WSUS, Tanium, or Ansible).

Nice To Haves

Direct experience supporting the US military and agency programs in Huntsville, AL.
Experience with containerization technologies such as Red Hat OpenShift, Kubernetes, or Docker.
Experience with Continuous Integration/Continuous Delivery (CI/CD) environments and tools (Gitlab, Ansible Automation, Jenkins, or Azure DevOps).
Active Server certifications: Server+.

Responsibilities

Install, configure, and maintain physical and virtual servers (Windows Server 2019/2022, Red Hat Enterprise Linux, Ubuntu) and enterprise workstations.
Administer essential network services including Active Directory (AD), Group Policy Objects (GPOs), Domain Name System (DNS), and Dynamic Host Configuration Protocol (DHCP).
Maintain and optimize VMware ESXi environments, vCenter Server, and associated virtual infrastructure to ensure maximum uptime.
Implement, test, and maintain robust data backup, disaster recovery, and system replication plans.
Assist in managing network-attached storage (NAS) and storage area network (SAN) configurations.
Regularly review, assess, and patch vulnerabilities identified by automated scanning tools such as ACAS (Assured Compliance Assessment Solution) and Nessus.
Apply Defense Information Systems Agency (DISA) Security Technical Implementation Guides (STIGs) to operating systems, browsers, and application enclaves to ensure compliance with Risk Management Framework (RMF) and NIST SP 800-53 standards.
Collaborate closely with Cybersecurity Professionals to compile and maintain RMF-compliant documentation, system security plans, and configuration management logs.
Implement and troubleshoot Public Key Infrastructure (PKI) and Single Sign-On (SSO) configurations.
Develop and refine administrative scripts using PowerShell, Bash, or Ansible to automate recurring tasks, patching schedules, and security configuration baselines.
Provide configuration and basic troubleshooting support for enterprise switches (e.g., Cisco), firewalls, and secure local area network (LAN) connections.
Familiarization and experience with support ticketing system such as ServiceNow to actively management customer requests and system projects.
Deliver advanced technical troubleshooting, end-user training, and incident resolution for escalated helpdesk requests.
Draft and maintain system administrator manuals, standard operating procedures (SOPs), and system architecture diagrams using tools like Microsoft Visio.