Linux System Administrator

This is a senior Linux/infrastructure engineering role supporting a classified mission environment. The primary focus is Linux engineering plus infrastructure operations, virtualization, security compliance, and automation .

The team operates a hybrid on-prem/cloud environment with multiple data centers, commercial/Government/custom applications, and a large data lake. The engineer will provide Tier 2–4 support and participate in both day-to-day operations and larger engineering projects.

Key responsibilities

• Engineer and support Linux servers and workstations , particularly Debian.
• Provide Tier 2–4 troubleshooting and incident resolution .
• Manage VMware vCenter and NSX-T virtualization infrastructure.
• Support Active Directory, DNS, DFS, and DHCP .
• Maintain systems according to DISA STIGs and security requirements.
• Operate and maintain infrastructure across data centers and AWS .
• Monitor infrastructure performance/utilization and maintain accurate inventories.
• Handle data-center tasks including hardware installation, cabling, commissioning, decommissioning, and property management.
• Support virtual servers, virtual desktops, VMware Horizon VDI, and automation .
• Coordinate engineering projects, technical risks, implementation conflicts, and schedules.
• Create/present technical documentation to review and approval boards.
• Use ServiceNow for requirements and incident management.

Required Qualifications:

• Linux engineering
• TS/SCI with Polygraph
• VMware vCenter + NSX-T
• Active Directory / DNS / DFS / DHCP
• DISA STIGs
• Infrastructure operations & maintenance
• Splunk
• Check_MK
• McAfee ePO
• BitLocker
• ServiceNow
• Tier 2–4 technical support
• Engineering/project coordination

Preferred Qualifications:

• Rocky Linux
• Ansible, scripting, and AI integration/automation
• Engineering Lead experience
• Tier 1–4 support
• CIS Benchmarks
• VMware Horizon VDI
• Technical briefings/documentation
• Classified-property and network-encryption-device management

RCT Systems offers:

• Competitive benefits package (medical, dental, vision, life insurance)
• Immediate 401k vesting
• Generous PTO and flexible schedules
• $500.00 annual technology allowance

RCT Systems is committed and proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regards to race, color, religion, sex (to include pregnancy and related conditions, sexual orientation, and gender identity), national origin, disability, veteran status, or any other federally protected class.