OT System Administrator

Overview.

Glocomms is partnered with a leading power and energy firm to support the hiring of a highly skilled OT Systems Administrator to manage and secure critical infrastructure across industrial environments. This role sits at the intersection of IT and Operational Technology (OT), supporting SCADA/ICS systems while ensuring reliability, compliance, and security across enterprise platforms.

The OT Systems Administrator is responsible for the administration, maintenance, and security of systems supporting mission-critical industrial operations. This individual will play a key role in ensuring system uptime, regulatory compliance and the integrity of infrastructure across both Windows and Linux environments.

Key Responsibilities

• Administer and support OT/ICS infrastructure within critical infrastructure environments.
• Manage Windows Server and Linux systems, including builds, patching, and system hardening.
• Oversee VMware environments and ensure system performance and availability.
• Support NetApp storage operations, including provisioning, replication, and snapshots.
• Execute enterprise backup and recovery, including restore testing and validation.
• Lead patch management and vulnerability remediation using tools like BigFix and Nessus.
• Monitor system health, perform tuning, and support incident response (24/7 on-call).
• Implement and maintain security controls (SIEM/Splunk, endpoint protection, file integrity monitoring).
• Administer Active Directory, GPOs, DNS, and enforce IAM/PAM and least privilege access.
• Support NERC CIP compliance, audits, disaster recovery, and business continuity efforts.

Qualifications

• 5+ years of experience in systems administration within OT, ICS, or critical infrastructure environments.
• Ability to work on-site 5-days a week.
• Strong experience with Windows Server, Linux administration, and VMware virtualization platforms.
• Hands-on expertise with enterprise backup/recovery, patch management, and vulnerability management tools.
• Deep understanding of security practices, including SIEM monitoring, endpoint protection, and system hardening.
• Familiarity with NetApp storage, RTUs, SCADA systems, and industrial protocols.
• Knowledge of Active Directory, IAM/PAM, DNS, and access control frameworks.
• Experience with Splunk, Nessus, BigFix, Tripwire, and AssurX is highly preferred.
• Relevant certifications such as Security+, MCSA/MCSE, or VCP are a plus.

What This Role Offers

• Opportunity to support mission-critical infrastructure in a highly regulated and impactful industry
• Exposure to both IT and OT security and operations
• A collaborative environment with strong emphasis on compliance, reliability, and system integrity
• Career growth within a stable and high-impact energy sector organization