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Lead Diagnostic Engineer at Giga Energy · Katori

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

Giga Energy designs and manufactures switchboards, transformers, and modular data center power infrastructure for the AI and mission-critical data center market. We're building our field service function from the ground up to support commissioning, startup, and post-installation service for our transformer product line as it scales into utility, industrial, and hyperscale data center deployments.

As a Field Service Engineer – Transformers, you'll be the technical face of Giga Energy at customer sites — commissioning new units, troubleshooting in-service equipment, and building the field service playbook as one of our first dedicated transformer FSEs.

Where you'll work

This role is a a heavy travel position. This candidate must be open to 50-70% travel expectations.

Base salary + travel per diem, competitive with market (benchmarked against ABB/Siemens/Powell field service compensation bands)
On-call rotation for emergency customer support
Company vehicle or travel allowance, per diem, and standard field service equipment provided

Responsibilities

Perform on-site installation oversight, startup, and commissioning of power and distribution transformers (oil-filled and dry-type) at customer facilities
Conduct acceptance testing per IEEE/IEC/NEMA and customer specifications prior to energization
Support equipment energization planning, outage coordination, and site readiness reviews with customers, EPCs, and project managers
Interpret and work from single-line diagrams, winding/vector diagrams, control schematics, and equipment nameplate data
Perform Turns Ratio (TTR) testing, winding resistance, insulation resistance (IR/PI), power factor/dissipation factor, and SFRA testing
Conduct Dissolved Gas Analysis (DGA) sampling and interpret oil analysis results to assess transformer health
Perform relay and protection testing where transformers interface with protective schemes
Diagnose and troubleshoot On-Load Tap Changer (OLTC/LTC) mechanisms, cooling systems, and control/monitoring equipment
Document all test results and produce clear, customer-ready technical reports
Execute troubleshooting, corrective maintenance, repair, and end-of-life/retrofit services on transformers in the field
Proactively identify potential equipment failures and recommend corrective or preventive actions to customers
Support warranty investigations, root cause analysis, and field failure reporting back to Engineering and Quality
Respond to emergency service calls, including after-hours and weekend support as required
Serve as the primary on-site technical representative for Giga Energy, building and maintaining strong customer relationships
Communicate job status, technical findings, and recommendations clearly to customers, contractors, and internal stakeholders
Prepare material lists, technical quotations, and scopes of work for follow-on service opportunities
Coordinate with site engineers, contractors, and internal Engineering/Quality teams during outages and installs
Comply fully with OSHA, NFPA 70E (arc flash/electrical safety), and Giga Energy EHS policies on every site visit
Maintain required certifications (e.g., NETA, OSHA 10/30, first aid/CPR) and complete ongoing safety training
Ensure all high-voltage work follows lockout/tagout (LOTO) and permit-to-work procedures
Maintain timely, accurate service reports, timesheets, expense reports, and job status updates
Feed field observations (failure modes, install issues, design feedback) into Giga's NCR/SCAR and continuous improvement processes

Requirements

Bachelor's degree in Electrical Engineering, Electrical Engineering Technology, or related field — OR equivalent experience (military electrical/electronics training, associate degree + relevant field experience)
2+ years of hands-on field experience with power/distribution transformers, switchgear, or related power delivery equipment (entry-level candidates with strong internships/training programs will be considered)
Working knowledge of transformer testing: TTR, insulation resistance, DGA/oil analysis, power factor testing
Ability to read and interpret electrical schematics, single-line diagrams, and winding/vector diagrams
Willingness and ability to travel 50–75%, including domestic and potentially international sites
Valid driver's license; ability to maintain/obtain a passport
Physical ability to lift/move equipment components and work in industrial field environments (heights, confined spaces, outdoor conditions)

Bonus Points

Experience with OEM transformer platforms (ABB, Siemens, GE, Hitachi Energy, Powell, ERMCO) or equivalent
Familiarity with On-Load Tap Changers (OLTC), cooling systems (ONAN/ONAF/OFAF), and bushings
NETA certification or working toward NETA Level II/III
Experience with protective relay testing and interpretation
Data center or mission-critical facility experience
Prior experience at a transformer OEM, utility, or independent testing/service organization

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.

Lead Diagnostic Engineer