Linux System Administrator

Our client is seeking an experienced Systems Administrator t o support mission-critical Department of Defense (DoD) operations in Orlando, FL . This is an excellent opportunity to work in a secure, fast-paced environment supporting enterprise infrastructure, cybersecurity initiatives, and lab operations while collaborating with engineering and cyber leadership.

If you thrive in Windows and Linux environments, enjoy solving complex infrastructure challenges, and have experience supporting DoD systems, we'd like to hear from you.

As a Systems Administrator II, you will:

• Administer, maintain, and troubleshoot Windows and Linux server environments supporting mission-critical systems.
• Install, configure, and maintain operating systems, software, firmware, and enterprise applications.
• Configure user accounts, permissions, group policies, and system access controls.
• Monitor system performance, identify issues, and perform hardware and software troubleshooting.
• Maintain server configurations in compliance with DISA STIGs and cybersecurity best practices.
• Support vulnerability management activities using ACAS and other DoD security tools.
• Perform system hardening, patch management, and configuration management.
• Support VMware virtual infrastructure including ESXi and vSphere environments.
• Provide Tier I, II, and III technical support through the enterprise help desk.
• Assist with lab operations and provide technical support during scheduled testing events.
• Collaborate with Cybersecurity and Engineering teams to implement secure, reliable infrastructure solutions.
• Maintain centralized logging solutions such as Splunk (or similar technologies).
• Support system documentation, change management, and operational procedures.

Required Qualifications

• Active Secret Security Clearance
• 3–5 years of Systems Administration experience
• DoD 8570 IAT Level II Certification (Security+, CCNA Security, CySA+, etc.)
• Bachelor's degree preferred (equivalent experience considered)
• Must be local to the Orlando, FL area
• Must be willing to work onsite full-time

Required Technical Experience

Candidates should have experience with most of the following:

Operating Systems

• Windows Server 2019 & 2022
• Windows Workstation Administration
• Linux Administration (RHEL 7 & RHEL 8)
• Proxmox

Virtualization

• VMware ESXi
• VMware vSphere

Infrastructure

• DNS
• MDT
• PXE Imaging
• Active Directory
• User and Group Management

Cybersecurity & Compliance

• ACAS (Assured Compliance Assessment Solution)
• DISA STIG implementation and remediation
• System hardening
• Patch management
• Vulnerability remediation

Enterprise Applications

• Splunk or similar centralized logging platforms
• Java
• Adobe
• Microsoft Edge
• VBScript

Endpoint & Security Management

• Trellix / McAfee ePO
• ENS Firewall
• DLP
• Policy Auditor
• HBSS / AESS

Help Desk & Operations

• ManageEngine Service Desk (Tier I-III)
• System troubleshooting
• Hardware diagnostics
• Technical documentation
• Change management support

Preferred Qualifications

Experience supporting one or more of the following is highly desirable:

• OCSP Axway Server Administration
• Enterprise logging and monitoring platforms
• DoD laboratory environments
• Secure enterprise infrastructure
• Mission-critical government systems