Staff OT/IT Support Engineer

Commonwealth Fusion Systems•Milpitas, CA

1d•$166,000 - $240,000•Onsite

About The Position

Commonwealth Fusion Systems is hiring a hands-on Staff OT/IT Support Engineer for its Milpitas site. The role combines management of shop-floor operational technology (OT) infrastructure with site-wide IT support. As the primary on-site technical point of contact, the engineer will help provide reliable, high-performing, secure systems for engineers, technicians, and operations teams while maintaining and scaling the physical network and compute infrastructure used in testing and manufacturing. The position involves deploying, monitoring, maintaining, and securing local server cabinets, industrial network switches, patch panels, cabling, UPS equipment, and edge compute nodes. The engineer will install and perform basic configuration of network equipment in coordination with central Network and IT Security teams, and serve as the local extension of the Cybersecurity team. The role also includes maintaining site technology assets, partnering with manufacturing and control systems teams to integrate OT networks with enterprise systems, and creating end-user documentation, SOPs, and network diagrams. This is an autonomous, 100%-on-site role in Milpitas, California. It may involve occasional travel, nights, weekends, and on-call work. The role requires the ability to lift up to 50 pounds and work safely around laboratory or light industrial equipment and hazards, including heat, cold, noise, fumes, strong magnets, lead, high voltage and current, pressure systems, and cryogenics.

Requirements

At least 7 years of experience in hands-on technical support, IT systems administration, or site infrastructure engineering.
Deep familiarity with supporting and troubleshooting Windows, macOS, and basic Linux environments, including Ubuntu or Red Hat.
Hands-on experience racking and stacking servers, punching patch panels, installing Cat6 Ethernet cabling, managing cables, and troubleshooting hardware.
Familiarity with Terraform, Ansible, and Infrastructure-as-Code patterns for scaling repeatable systems.
Strong working knowledge of TCP/IP, VLANs, subnetting, DHCP, DNS, and basic command-line network switch configuration.
Experience with Active Directory, Okta, and modern endpoint management tools.
Ability to work 100% on-site in Milpitas, California.
Ability to lift up to 50 pounds occasionally and perform activities such as stooping, climbing, standing, and sitting for extended periods.
Willingness to travel or work required nights, weekends, or on-call occasionally.
Dedication to safety when working around industrial hazards, which may include heat, cold, noise, fumes, strong magnets, lead, high voltage, high current, pressure systems, and cryogenics.
Ability to comply with U.S. export control laws as a condition of employment.

Nice To Haves

Kubernetes experience.
Cloud experience with AWS.
On-premises virtualization experience with vCenter and Proxmox.
Database fundamentals, including Postgres and Timescale.
Comfort using AI tooling and ability to discern hallucinations.
Experience transitioning from traditional systems administration to SRE, with a DevOps mindset.
Interest in clear documentation and familiarity with PLCs and Purdue models.

Responsibilities

Deploy, monitor, maintain, and secure site server cabinets, industrial network switches, patch panels, cabling, UPS equipment, and edge compute nodes supporting test rigs and manufacturing lines.
Physically install and perform basic configuration of networking equipment, including switches, access points, and edge firewalls, in coordination with central Network and IT Security teams.
Act as the on-site extension of the Cybersecurity team by ensuring systems follow secure-by-default standards, responding locally to security events, overseeing vendor access, and helping raise the site's security posture.
Maintain accurate asset tracking, hardware inventory, rack elevations, and lifecycle management for IT/OT endpoints and spare hardware at the Milpitas facility.
Partner with manufacturing engineers, control systems teams, and corporate IT to safely integrate OT networks with core enterprise systems.
Create end-user documentation, standard operating procedures, and site network layout diagrams.
Maintain organized cabling, hardware staging, and the technical workspace.
Occasionally travel or work nights, weekends, or on-call as required.
Work safely around laboratory or light industrial equipment and hazards.