Flex

Test Engineer

Fontana, CA, United States · Work style not stated · Full time

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About the role

Description from the employer’s posting. Check the employer’s page for the current version.

EmployerFlex
LocationFontana, CA, United States
Work styleWork style not stated
Employment typeFull time
Employer posted18 Sep 2026

Flex is the diversified manufacturing partner of choice that helps market-leading brands design, build and deliver innovative products that improve the world.

A career at Flex offers the opportunity to make a difference and invest in your growth in a respectful, inclusive, and collaborative environment. If you are excited about a role but don't meet every bullet point, we encourage you to apply and join us to create the extraordinary.

Job Summary

Flex intends to spin off its Cloud and Power Infrastructure segment into a new, independent publicly traded company, Axiom, with the spin planned for Q1 2027. If the intended spin occurs, this role will support Axiom, a company focused on critical digital infrastructure and delivering end-to-end power and thermal management solutions for AI data centers and other mission-critical applications.



To support our extraordinary teams who build great products and contribute to our growth, we’re looking to add a Test Engineer located in Fontana, CA.

Show full description

Reporting to the Electrical Engineering Manager, the Test Engineer will be responsible for fulfilling testing requirements for manufacturing projects while meeting schedule requirements. The Electrical Test Engineer will contribute to the overall testing of manufacturing projects related to relay panels, control buildings, and medium voltage switchgears.

What a typical day looks like:

Maintains testing schedule per Crown project schedule and production schedule in partnership with Production Leaders and Engineering Department.

Monitors testing status daily; gathers feedback from all test technicians.

Reviews project specifications and implement testing procedures to comply with project requirements.

Reviews test plans of all projects against schematics with test technicians before submittal.

Maintains test folder for all projects with relevant test reports, test drawings, and test pictures.

Reviews and maintains testing equipment list with Test Technicians.

Creates and maintains test procedures, including testing forms.

Performs power testing of protective relay panels, medium voltage switchgear line-ups, test communication, and HMI components on the relay panel. Testing also involves panel boards, automatic transfer switches, fire alarm systems, air conditioning, and other power distribution components.

Leads problem-solving initiatives to analyze quality failures and help drive quality improvements (ex. ways to improve the efficiency of testing to reduce the time required).

Ensures all team members follow testing standards and safety procedures; promptly report and investigate all quality failure incidents.

Works with Lead Engineer and assists with other related project tasks.

Perform all other duties, as assigned.

The experience we’re looking to add to our team:

Bachelor’s Degree in Electrical Engineering preferred; experience may be substituted for education.

Prior hands-on experience performing AC/DC functional testing on protection relays, MV switchgear, MV breaker, and arc flash.

At least 2 to 4 years of related work experience.

Knowledge in testing three-phase AC and DC power distribution circuits, including troubleshooting.

Ability to follow Crown/Customer testing forms and IEEE guidelines to perform testing.

Detail-oriented with excellent problem-solving and analytical skills

JG25

What you'll receive for the great work you provide:

Full range of medical, dental, and vision plans
Life Insurance
Short-term and Long-term Disability
Matching 401(k) Contributions
Vacation and Paid Sick Time
Tuition Reimbursement

Application Deadline:

Applications for this job position will be accepted for at least five days following the job posting start date below and continuing until the end date below or until the position is filled. This posting may close sooner due to application volume.

Job Posting Start Date 09-18-2026 Job Posting End Date 11-06-2026



The base pay range for this position is provided below. The final base rate offered will be determined using job-related, non-discriminatory criteria, including but not limited to experience, qualifications, geographic location, education, external market data, and internal equity.

$65,200.00 USD - $89,600.00 USD Annual

Job Category

Production Engineering

Relocation: Not eligible

Is Sponsorship Available?

Flex is an Equal Opportunity Employer and employment selection decisions are based on merit, qualifications, and abilities. We do not discriminate based on: age, race, religion, color, sex, national origin, marital status, sexual orientation, gender identity, veteran status, disability, pregnancy status, or any other status protected by law. We're happy to provide reasonable accommodations to those with a disability for assistance in the application process. Please email accessibility@flex.com and we'll discuss your specific situation and next steps (NOTE: this email does not accept or consider resumes or applications. This is only for disability assistance. To be considered for a position at Flex, you must complete the application process first).

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