Systems Administrator

IT/OT Infrastructure Specialist

Location:

Hawaii Full-Time | Industrial & Enterprise Technology Environment Help Power Critical Infrastructure Across Hawaii Are you a hands-on infrastructure professional who enjoys solving complex technical challenges across networking, virtualization, cybersecurity, and operational technology (OT) environments? We're seeking an IT/OT Infrastructure Specialist to support and enhance mission-critical infrastructure that keeps industrial, refinery, retail, and business operations running securely and efficiently.

This is more than a traditional network engineering position. You'll work at the intersection of enterprise IT, industrial operations, cybersecurity, cloud-connected systems, virtualization, and infrastructure modernization, helping bridge the gap between IT and OT environments while ensuring reliability, security, and uptime.

If you're passionate about infrastructure, enjoy working across diverse technologies, and want to make a direct impact in a highly visible operational environment, we'd love to hear from you.

What You'll Do Operational Technology (OT) Infrastructure Support Support and maintain infrastructure used by industrial applications, process control systems, historians, monitoring platforms, and OT environments.

Collaborate with OT engineers, process control teams, cybersecurity personnel, infrastructure teams, and vendors to ensure secure and reliable system operation.

Assist with connectivity and support for SCADA, DCS, engineering workstations, application servers, and industrial support systems.

Evaluate and document application dependencies, network behaviors, and operational requirements.

Implement and support network segmentation strategies, including VLANs, ACLs, firewall policies, and secure access controls.

Participate in troubleshooting and incident response activities impacting operational environments.

Help maintain secure IT/OT boundaries through cybersecurity best practices such as least privilege access, asset management, vulnerability remediation, and controlled remote access.

Infrastructure, Virtualization & Storage Administration Support Windows Server and Linux-based environments, including vendor-managed industrial application platforms.

Administer and maintain virtualization technologies such as:

VMware vSphere

Hyper-VNutanix Proxmox Similar  enterprise virtualization platforms

Support clustered environments, high-availability systems, virtual machine lifecycle management, backup strategies, and disaster recovery planning.

Maintain storage infrastructure, including SAN, NAS, and platforms such as TrueNAS.Configure and troubleshoot:

NFSiSCSIStorage networking

Multipathing

Volumes and datasets

File shares and access controls

Assist with infrastructure modernization efforts, server migrations, storage upgrades, and virtualization of legacy systems.

Validate system performance and functionality following maintenance activities and infrastructure changes.

Network & Security Operations Support enterprise and OT network infrastructure including switches, routing, firewalls, and segmented environments.

Maintain secure communications between business and operational technology networks.

Assist with network performance monitoring, troubleshooting, and optimization.

Support change management processes and ensure compliance with operational and security standards.

Contribute to infrastructure documentation, architecture diagrams, and operational procedures.

Required Qualifications Experience supporting Windows Server environments.

Experience with VMware vSphere or comparable virtualization platforms.

Working knowledge of enterprise networking concepts including:

TCP/IPVLANsRouting and switching

Firewalls

Access Control Lists (ACLs)
Familiarity with…