System Administrator III

Onward Energy•Denver, CO

1d•Hybrid

About The Position

We are seeking a motivated, experienced and detail-oriented System Administrator III to join our IT Infrastructure team. This role will be responsible for the design, implementation and ongoing management of enterprise IT infrastructure including internal, hosted and cloud systems. You will work closely with other IT staff to ensure reliable and secure IT operations for all IT and OT environments at approximately 60 locations. We are a growing organization with a high rate of change, and this role requires someone adaptable and able to adjust to new technologies, equipment and processes.

Requirements

7+ years of progressive experience in system administration or infrastructure engineering roles.
Strong expertise in Windows Server administration in enterprise environments
Extensive hands-on experience with Active Directory, Group Policy, DNS, DHCP and identity services
Significant experience supporting Microsoft Azure IaaS components in production environments
Strong knowledge of Microsoft 365 / Office 365, including Entra ID (Azure AD), Intune and core collaboration services
Solid experience with virtualization platforms, particularly Hyper-V.
Experience implementing and supporting SAML-based SSO and identity federation
Strong understanding of backup, disaster recovery, high availability and business continuity concepts
Comfortable operating in environments with frequent change, evolving priorities and emerging technologies
Excellent troubleshooting skills with the ability to work independently on complex technical challenges
Strong written and verbal communication skills, with the ability to document and explain complex systems clearly

Nice To Haves

Power generation industry experience
Related certifications (Azure, Office 365, Windows Server, etc.)
Experience configuring enterprise network hardware
Experience with or exposure to OT / ICS / SCADA systems and networks
Experience integrating environments during M&A activities, including directory, tenant and infrastructure consolidation
Familiarity with cybersecurity frameworks, audits and compliance requirements in regulated environments
Experience supporting distributed infrastructure across many geographically dispersed sites
Scripting or automation experience (PowerShell, Azure CLI, etc.)

Responsibilities

Design, implement, administer and support enterprise server, virtualization, identity and cloud platforms across both IT and OT environments.
Serve as a senior technical resource for complex systems issues, incidents and escalations, providing deep troubleshooting and root cause analysis.
Administer and evolve Active Directory, Group Policy, DNS, DHCP and identity-related services in a hybrid environment.
Design, administer and support Microsoft Azure services including virtual machines, storage, networking, identity integration and security controls.
Manage and enhance Microsoft 365 / Office 365 services including Entra, Exchange Online, SharePoint Online, Teams and Intune.
Implement and maintain device management and security solutions using Intune, including configuration, security and application deployment policies for Windows and mobile devices.
Support and integrate SAML-based single sign-on (SSO) and identity federation with third-party applications and services.
Administer enterprise virtualization platforms (primarily Hyper-V) and associated storage, backup and recovery systems.
Partner closely with Network Administration and Cybersecurity teams to ensure secure system configurations, segmentation and compliance with security standards.
Participate in and often lead systems-related infrastructure projects, upgrades, migrations and refresh initiatives.
Support integration or separation of systems during mergers and acquisitions, including identity consolidation, domain strategy, tenant integration and infrastructure alignment.
Ensure systems are hardened, patched, monitored and compliant with company security, operational and audit requirements.
Support OT infrastructure in collaboration with SCADA, engineering and operations teams, with a strong focus on reliability, safety and compliance.
Develop, maintain and improve technical documentation, standards, diagrams, runbooks and disaster recovery procedures.
Provide on-call or after-hours support as needed for critical infrastructure issues and planned maintenance activities.
Mentor and provide technical guidance to system administrators and other IT staff.