Mechanical Field Engineer

About Giga

Giga is building gigawatts of AI data centers to hasten a future of intelligence and abundance. We build data centers fast and at scale by combining the capabilities of an equipment supplier, engineering firm, general contractor, and real estate developer under one roof. Our team moves quickly and thinks practically. If you're ready to make an impact in an industry that matters, we're looking for people like you.

Why join Giga

The Pace: We're building at a speed most companies talk about but never actually operate at. If you've been bored somewhere else, you won't be here.

The Impact : Every person at Giga touches the work that matters. No layers, no waiting for approval chains. You'll see your fingerprints on what we ship.

The Team: A team of operators defining the future of AI infrastructure. We recruit A-players from the most innovative companies in the world, and they choose Giga because the work here means more.

The Moment : AI doesn't run without power, and that's us. Giga is the picks and shovels behind the AI revolution. This industry is about to explode, and you'll be in the room where it's already happening.

What you’ll do

As the Mechanical Field Engineer , you will be the person who keeps mechanical construction moving when the field runs into a question the drawings can't answer. You'll write and resolve RFIs, chasing down design intent, code requirements, and existing conditions so the field never sits idle waiting on an answer. You'll own change orders end-to-end — spotting scope changes before they become disputes, documenting them, pricing them out with the team, and running them through to resolution and approval. You'll work daily with the Mechanical Superintendent, the design team, and subcontractors to make sure the paper trail matches what's actually getting built.

Where you’ll work

This is a site-based role. You'll be on-site full-time at an active Giga data center construction site, with the specific location depending on current project needs, with potential relocation or extended assignment to other active sites as the portfolio grows.

Responsibilities

Identify, write, and track RFIs for mechanical scope, ensuring clear documentation of the issue, impact, and requested resolution

Follow up with design teams and engineers of record to drive RFIs to timely closure, escalating stalled items

Review mechanical drawings, specifications, and P&IDs to spot discrepancies, conflicts, or missing information before they become field problems

Identify potential change order conditions in the field and document them accurately and promptly

Prepare change order requests, including scope description, backup documentation, and cost/schedule impact

Coordinate with project controls, PMs, and subcontractors to price, negotiate, and resolve change orders

Maintain a change order and RFI log, and report status regularly to the Mechanical Superintendent and Project Director

Support field layout and installation checks to verify work matches approved drawings and RFI/change order resolutions

Coordinate with commissioning and controls teams to ensure resolved RFIs and change orders are reflected in as-built documentation

Assist with material takeoffs and procurement follow-up tied to approved change orders

Requirements

Bachelor's degree in Mechanical Engineering, Construction Management, or a related field

3+ years of experience as a field engineer, project engineer, or similar role on mechanical construction projects

Working knowledge of mechanical systems, including CRAH/CRAC, chillers, piping, and BMS/controls

Ability to read and interpret P&IDs, mechanical specifications, and equipment schedules

Experience writing and managing RFIs and change orders on a construction project

Strong organizational skills, with the ability to track multiple open items across a fast-moving job site

Strong written communication skills, with the ability to document technical issues clearly for design teams and ownership

Bonus points  

Experience on data center or other mission-critical facility construction projects

Familiarity with commissioning (Cx) processes and how RFIs/change orders affect FPTs and IST

Experience with project management software (e.g., Procore, PlanGrid, Bluebeam)

OSHA 30 certification

How We Work

We value people who take ownership, raise risks early, communicate directly, and follow through. Incomplete information is part of the job. Make the best decision you can, document it, and adjust as the facts change. Move quickly on reversible decisions and take more care when security, safety, financial, employee, or customer risk is involved.

Benefits

Subsidized health, dental, and vision insurance

Equity (options) in a rapidly growing startup

401(k) with 4% employer match

Unlimited PTO

Parental leave

Healthcare and Dependent Care Flexible Spending Accounts (FSA) or Health Savings Account (HSA)

Commuter benefits, where applicable

Opportunities to collaborate in person at periodic team and company on-sites

Equal Opportunity Employer Statement

Giga Energy is an equal opportunity employer and is committed to fostering an inclusive and diverse workplace. We do not discriminate based on race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, veteran status, or any other protected characteristic as outlined by federal, state, or local laws. Giga Energy complies with all applicable labor laws, including the California Fair Employment and Housing Act (FEHA) and other relevant state and federal regulations. We provide reasonable accommodations for qualified individuals with disabilities and encourage applicants who require accommodations during the hiring process to contact us.