Senior System Administrator I, Operational Technologies (OT)

About the role

The Senior System Administrator I ensures the reliability, availability, security, and compliance of operational technology systems used across renewable energy operations. Working with a high degree of autonomy, the role designs, deploys, secures, and optimizes critical OT infrastructure, leads complex incident resolution and lifecycle initiatives, and provides technical guidance to administrators while operating without formal people-management responsibilities.

Responsibilities

• Serve as the technical lead for complex OT system administration issues, developing sustainable solutions that reduce recurring failures and infrastructure risk
• Design, deploy, and manage advanced on-premises OT system environments supporting SCADA, control networks, and secure remote operations; contribute to future-state planning and readiness for potential Microsoft Azure and Amazon Web Services (AWS) adoption
• Act as the Tier 3 escalation point for complex Microsoft Windows Server and Linux operating system, virtualization, endpoint management, storage, backup, and on-premises infrastructure incidents
• Lead high-availability, redundancy, backup-verification, failover-testing, and disaster-recovery readiness activities for critical OT systems
• Own configuration management for OT server platforms, enforcing version control, approved baselines, and complete system documentation across environments
• Develop and apply system-hardening baselines based on approved NIST or CIS guidance, partnering with cybersecurity to remediate vulnerabilities and implement compensating controls
• Lead Windows and Linux operating system migrations, hypervisor upgrades, endpoint-management changes, and on-premises infrastructure modernization activities; support assessments, pilots, and transition planning for future Azure or AWS capabilities
• Manage lifecycle planning for Windows, Linux, and on-premises infrastructure platforms, identifying end-of-life risks, defining upgrade paths, and confirming vendor support coverage while considering future cloud integration requirements
• Collaborate with SCADA, field engineering, cybersecurity, and operations teams to deploy services, validate interoperability, and address systemic infrastructure gaps
• Coordinate root-cause analysis and post-incident reviews for critical outages or failures, then implement and track permanent corrective actions
• Standardize imaging, deployment, monitoring, patching, access control, and configuration procedures across Windows and Linux OT environments while preserving NERC CIP evidence and change-control requirements; help define cloud-ready standards for potential future Azure and AWS use
• Mentor technicians and junior administrators through technical knowledge sessions, troubleshooting guidance, and review of implementation plans and operational documentation

Requirements

• Bachelor's degree in Information Technology, Computer Science, Engineering, or a related field, or equivalent practical experience
• Minimum 5 years of relevant IT experience