[Skip to main content](#main-content) [OpenNash Jobs](https://jobs.opennash.com/) [Hiring report](/reports/hiring/) · [All Coherent jobs](https://jobs.opennash.com/companies/coherent/) · [Search jobs](/search/) Coherent · Fremont, CA # Principal Test Engineer Fremont, CA, United States Hybrid Senior individual contributor Operations Listed on Coherent’s official careers site. Posted April 21, 2026. Check that it is still open and apply there. [Apply on Coherent’s careers site →](https://hcwp.fa.us2.oraclecloud.com/hcmUI/CandidateExperience/en/sites/CX_1/job/2011931) [OpenNash Jobs](https://jobs.opennash.com/) / [Coherent](https://jobs.opennash.com/companies/coherent/) / Principal Test Engineer ## Job description ### Primary Duties & Responsibilities Lead the testing of new PICs, providing test summaries while maintaining data traceability. Lead the configuration, setup, and qualification of test systems for silicon photonic ICs, including optical and electrical characterization platforms. Perform hands-on debugging and root cause analysis for test anomalies, and data inconsistencies. Continuously evaluate and implement automation solutions to increase test efficiency and reduce operator intervention. Drive improvement projects aimed at enhancing test robustness, and repeatability. ### Education & Experience Bachelor’s degree or higher in Electrical Engineering, Optical Engineering, Physics, or a related field. Minimum of 10 years of hands-on laboratory experience in photonics, semiconductor, or optoelectronic device testing. Deep familiarity with lab instrumentation such as Lasers, Power Meters, Optical Spectrum Analyzers, Vector Network Analyzers (VNA), and Probe Cards. Proven expertise in automated test development, including scripting (Python, LabVIEW, or similar) for optical and electrical measurements. Excellent communication and collaboration skills. Highly organized and detail-oriented, with the ability to manage multiple concurrent tasks and deliver on schedule. Skills & Other Requirements Working Conditions This position is hybrid May require occasional off-site meetings or travel Regular use of a computer and other office equipment is necessary Interaction with team members and external contacts is a regular part of the job May require occasional overtime and flexibility in work hours to accommodate the executive’s needs Physical Requirements Sitting for extended periods while working on a computer or conducting meetings. Use of hands and fingers for typing, writing, and handling documents. Occasional lifting of objects or materials up to 20 pounds for administrative tasks. Ability to communicate verbally and in writing. Mobility within the office environment to attend meetings or interact with colleagues. Safety Requirements All employees are required to attend scheduled training, follow the site EHS procedures and Corporate EHS standards. This includes the use of proper protective equipment (PPE) as required by the job responsibilities. Managers will ensure that all safety and environmental procedures are followed consistently. They will ensure that risk assessments are performed, proper training, work instructions, required PPE is available, and will monitor compliance. Quality and Environmental Responsibilities Depending on location, this position may be responsible for the execution and maintenance of the ISO 9000, 9001, 14001 and/or other applicable standards that may apply to the relevant roles and responsibilities within the Quality Management System and Environmental Management System. Culture Commitment Ensure adherence to company’s values (ICARE) in all aspects of your position at Coherent Corp.: I ntegrity - Create an Environment of Trust C ollaboration - Innovate Through the Sharing of Ideas A ccountability - Own the Process and the Outcome R espect - Recognize the Value in Everyone E nthusiasm - Find a Sense of Purpose in Work Coherent Corp. is an equal opportunity/affirmative action employer. All qualified applicants will receive consideration for employment without regard to sex, gender identity, sexual orientation, race, color, religion, national origin, disability, protected Veteran status, age, or any other characteristic protected by law. If you need assistance or an accommodation due to a disability, you may contact us at talentacquisition@coherent.com. #LI-AW1 #IND ## At a glance - Posted by the employer: Apr 21, 2026 - First seen by OpenNash: Jul 10, 2026 - Last checked: Oct 18, 2026 - Listed for: 180 days - Location: Fremont, CA, United States - Work arrangement: Hybrid[Apply on Coherent’s careers site →](https://hcwp.fa.us2.oraclecloud.com/hcmUI/CandidateExperience/en/sites/CX_1/job/2011931) ## More jobs at Coherent ### [Lead Epi Engineer](https://jobs.opennash.com/companies/coherent/jobs/18d6a439aecb15c4501d/) Fremont, CA, United States ### [Member of Technical Staff - Switch Systems Test Engineer](https://jobs.opennash.com/companies/coherent/jobs/5eaae9e7525e82660f3c/) Fremont, CA, United States ### [Operations Supervisor](https://jobs.opennash.com/companies/coherent/jobs/8af03cec83f11988e433/) Fremont, CA, United States ### [Optical Transceiver Engineer](https://jobs.opennash.com/companies/coherent/jobs/ad9a743ff97172564262/) Fremont, CA, United States ### [Principal Silicon Photonics Test Engineer](https://jobs.opennash.com/companies/coherent/jobs/318bd29183e81d47d8d0/) Fremont, CA, United States ## Similar jobs at other companies ### [Senior Principal Test Engineer](https://jobs.opennash.com/companies/bae-systems/jobs/c9f6847fbabca35b6453/) BAE Systems · Nashua, New Hampshire, United States ### [Senior Principal Test Engineer](https://jobs.opennash.com/companies/bae-systems/jobs/f25e745af44a45c488ab/) BAE Systems · Totowa, New Jersey, United States ### [Test Engineer / Principal Test Engineer - 18264](https://jobs.opennash.com/companies/northrop-grumman/jobs/b878659d8598add95d6a/) Northrop Grumman · United States-Alabama-Huntsville ### [Test Engineer / Principal Test Engineer - 19822](https://jobs.opennash.com/companies/northrop-grumman/jobs/86dd1efd2f34a921a017/) Northrop Grumman · United States-Utah-Roy ### [Principal Test Engineer, Test Architecture](https://jobs.opennash.com/companies/renesas-electronics/jobs/27c79aca8b4d907707fe/) Renesas Electronics · San Jose, CALIFORNIA, United States OpenNash lists jobs from employers’ own careers sites and does not handle applications. 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