OT Systems Network Engineer

Enterprise Automation•Irvine, CA

4d•Onsite

About The Position

We’re seeking an experienced OT Systems Engineer to support the design, review, implementation, commissioning, and troubleshooting of operational technology solutions across industrial client environments. This role combines technical depth in OT systems, industrial networking, automation platforms, and cybersecurity with hands-on project execution and client-facing support. You’ll contribute independently to solution development, root cause analysis, remediation, documentation, and technical discovery. You’ll also serve as a subject matter resource for OT best practices and risk reduction, helping clients and internal teams evaluate technical options and implement solutions that improve performance, reliability, and security.

Requirements

Solid experience in operational technology, industrial automation, controls, or systems integration.
Strong technical knowledge of OT architecture, industrial networks, and implementation best practices.
Hands-on experience in client-facing technical roles supporting industrial environments.
Ability to independently analyze problems, identify options, and implement practical solutions.
Strong troubleshooting and diagnostic skills in OT/ICS environments.
Working knowledge of OT cybersecurity concepts, segmentation, remote access, and risk mitigation.
OT cybersecurity tools and practices: asset visibility, remote access, monitoring, and vulnerability management.
Industrial networking: managed switches, routing, VLANs, firewalls, and segmentation using common platforms such as Cisco, Fortinet, Palo Alto, Moxa, and Hirschmann.
Virtualization experience using common platforms such as VMware and Hyper-V.
Windows Server administration experience, including Active Directory, Group Policy, Remote Desktop Services, SQL Server, and WSUS.
Excellent written and verbal communication skills
Strong technical knowledge of control systems.
PLC platforms: Rockwell Automation, Siemens, Schneider Electric
SCADA/HMI platforms: AVEVA System Platform, Inductive Automation Ignition, Trihedral VTScada, Rockwell FactoryTalk View, Siemens WinCC
Historian/data platforms: AVEVA PI, AVEVA Historian, AVEVA Reports, Microsoft SQL Server, SSRS, and PowerBI
Common industrial protocols: EtherNet/IP, Modbus TCP/RTU, Profinet, OPC UA, DNP3, IEC 61850
WAN connectivity: cellular modems, wireless backhaul radios, site to site VPN, SD-WAN.
Linux administration experience.
Diagramming skills in Microsoft Visio.

Nice To Haves

Certified Information Systems Security Professional (CISSP)
Global Industrial Cybersecurity Professional (GICSP)
Certified Information Systems Auditor (CISA)
VMware Certified Professional (VCP)

Responsibilities

Support the design, review, implementation, and commissioning of OT engineering and architecture solutions across multiple concurrent client projects.
Provide technical leadership on OT technologies, industrial networking, automation platforms, and cybersecurity practices.
Stay current on each and provide guidance to clients and internal teams on new technologies, emerging trends, and best practices.
Troubleshoot complex networking, firewall, operating system, virtualization, and other general OT issues.
Support root cause analysis, remediation, and system optimization.
Evaluate technical options and recommend approaches that balance performance, reliability, security, and maintainability.
Specify and develop hardware and software bill of materials.
Serve as a subject matter resource for OT cybersecurity best practices and risk reduction.
Support OT investigations, audits, modernization efforts, upgrades, and integration projects.
Develop and maintain OT technical documentation and drawings, including deliverables such as network drawings, IP address & network segmentation schemes, firewall rules, virtual machine & server specifications, and Active Directory & Group Policy specifications.
Contribute to technical discovery, scoping, and solutioning discussions with clients and internal teams.