Staff OT/IT Support Engineer

Commonwealth Fusion Systems•Milpitas, CA

8d•Onsite

About The Position

Commonwealth Fusion Systems is seeking a hands-on Staff OT/IT Support Engineer for its Milpitas site. This autonomous role supports both shop-floor operational technology infrastructure and site-wide IT infrastructure. The engineer will serve as the primary on-site technical contact, helping engineers, technicians, and operations teams use reliable, secure systems while maintaining and scaling the physical network and compute infrastructure that supports testing and manufacturing operations. The role involves a mix of site support and infrastructure work, including installing and maintaining server cabinets, industrial network equipment, cabling, power equipment, and edge compute nodes. The engineer will coordinate network and systems setup with central Network and IT Security teams, support the site’s security posture, manage IT/OT assets, collaborate across engineering and corporate IT teams, and create documentation and diagrams. The position is 100% on-site in Milpitas, California, and requires occasional travel or work at night, on weekends, or on-call. The salary range is $166,000–$240,000, plus equity and benefits.

Requirements

At least 7 years of experience in hands-on technical support, IT systems administration, or site infrastructure engineering.
Deep familiarity 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 using infrastructure-as-code patterns to scale 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.
Ability to stoop, climb, stand, and sit for extended periods.
Willingness to travel or work required nights, weekends, or on-call occasionally.
Dedication to safety when working around hazards that may include heat, cold, noise, fumes, strong magnets, lead, high voltage, high current, pressure systems, and cryogenics.
Strong communication skills, including the ability to explain technical topics to non-technical staff and engineering teams.
Ability to take ownership of site responsibilities and maintain organized cabling, hardware staging, and a well-presented technical workspace.

Nice To Haves

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

Responsibilities

Deploy, monitor, maintain, and secure site server cabinets, industrial network switches, patch panels, cabling, UPSs, 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.
Serve 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 improving site 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 enterprise systems.
Create end-user documentation, standard operating procedures, and site network layout diagrams.
Provide hands-on support and troubleshooting for site systems and infrastructure.
Work safely around laboratory or light industrial equipment and mitigate industrial hazards.