Systems Administrator

Systems Administrator – OT Infrastructure (Moncks Corner, SC)

Optomi, in partnership with a leading energy provider, is seeking an experienced Systems Administrator to support critical Operational Technology (OT) infrastructure in Moncks Corner, SC! This position is ideal for a hands-on infrastructure professional with strong experience administering Windows Server, Red Hat Enterprise Linux (RHEL), and VMware virtualized environments. The right candidate will support mission-critical systems, troubleshoot complex infrastructure issues, maintain backup and security monitoring solutions, and assist with ongoing infrastructure initiatives. This role requires strong analytical skills, attention to detail, and the ability to work independently while collaborating with an established technical team. The right candidate will enjoy working in a mission-critical environment where reliability, security, and documentation are essential!

What the right candidate will enjoy!

• The opportunity to support critical infrastructure for a leading energy provider!
• The ability to make an immediate impact on essential infrastructure initiatives and day-to-day operations.
• Working with an established technical team in a highly virtualized, on-premises environment.
• The opportunity to apply and expand technical skills across Windows, Linux, virtualization, networking, and security platforms.

Experience of the right candidate:

• Strong experience administering Microsoft Windows Server and Red Hat Enterprise Linux (RHEL) environments.
• Hands-on experience supporting VMware virtualization technologies and virtual server infrastructure.
• Experience with enterprise backup and recovery solutions, endpoint protection, and security monitoring platforms.
• Strong understanding of enterprise networking concepts, including TCP/IP, DNS, DHCP, subnetting, and network troubleshooting.
• Experience troubleshooting complex server, application, and infrastructure issues.
• Strong written and verbal communication skills, with an emphasis on technical documentation and collaboration.
• Ability to work independently, prioritize issues, and support critical infrastructure in an established team environment.
• Familiarity with security frameworks, compliance requirements, and formal change management processes.
• Previous experience in a NERC CIP-regulated environment is a plus.

Responsibilities of the right candidate:

• Administer, maintain, and troubleshoot Microsoft Windows Server and Red Hat Enterprise Linux (RHEL) systems.
• Support and maintain VMware virtualized infrastructure and associated server environments.
• Evaluate, test, and deploy operating system and application patches in accordance with established procedures.
• Troubleshoot Microsoft Active Directory and related infrastructure services.
• Perform advanced technical troubleshooting across server, application, and infrastructure components.
• Support enterprise backup and recovery solutions, including Veeam Backup & Replication.
• Maintain and troubleshoot security and infrastructure monitoring platforms, including Symantec Endpoint Protection, Tripwire, and PRTG Network Monitor.
• Assist with plant network switch configuration, connectivity troubleshooting, and system monitoring.
• Apply established security, compliance, and change management practices while maintaining accurate technical documentation.
• Collaborate with team members to resolve infrastructure issues, support high-priority projects, and maintain reliable day-to-day operations.
• Participate in a rotating 24x7x365 on-call support schedule as needed.
• Contribute to the stability, security, and ongoing improvement of mission-critical OT infrastructure.