[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 · Sunnyvale, CA # Test Engineer Sunnyvale, CA, United States On-site Operations Listed on Coherent’s official careers site. Posted October 1, 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/2015191) [OpenNash Jobs](https://jobs.opennash.com/) / [Coherent](https://jobs.opennash.com/companies/coherent/) / Test Engineer ## Job description ### Primary Duties & Responsibilities Review and interpret product specifications, test requirements, and technical documentation for fiber optic modules, subsystems, and chassis-level systems. Design, develop, and implement comprehensive test methods and procedures for new and existing products. Perform calibration, functional testing, validation, troubleshooting, and failure analysis of fiber optic modules and systems. Analyze test data to assess product performance, identify trends, investigate deviations, and support corrective actions. Document test procedures, setups, configurations, and results with a high level of accuracy and clarity. Generate thorough test reports to support engineering, manufacturing, quality assurance, and customer requirements. Interface with optical, electrical, and automated test instruments; develop and maintain reliable instrument-control and data-acquisition setups. Configure, load, verify, and handle chassis-level software in production in accordance with approved work instructions and release procedures. Handle firmware and software securely, including access control, version verification, approved release usage, traceability, and protection of production software and test data. Support production ramp, train manufacturing personnel on test procedures, and help improve test efficiency, repeatability, and yield. ### Education & Experience BS or MS in optics, physics, electrical engineering, mechanical engineering, computer engineering, or a related technical field. Experience in optics, photonics, fiber optics, or related optical test applications is desired. Related industrial experience in product or manufacturing test is a plus. ### Skills Experience with optical, electrical, and general-purpose test instruments, including instrument interfacing and communication interfaces such as Ethernet, USB, GPIB, serial, or similar protocols. Experience developing or maintaining automated test software and data-acquisition systems. LabVIEW experience is a plus; experience with Python, Visual Basic, or similar languages is also valuable. Ability to work with limited supervision and manage assigned tasks and projects effectively. Ability to read, learn, and analyze complex test methods; research solutions; and develop practical, resourceful approaches to technical problems. Ability to leverage knowledge and experience and apply them to solve problems resourcefully. Ability to manage multiple priorities and projects while maintaining careful attention to detail. Ability to teach and train others within the work group. Excellent interpersonal communication, technical writing, and presentation skills. Working Conditions Good office working conditions. At times, this position may require work in a Class 10,000 cleanroom environment while wearing a smock, mask, and gloves. Physical Requirements Able to move light equipment and tooling ( Safety Requirements All employees are required to follow the site EHS procedures and Coherent Corp. Corporate EHS standards. 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. ## At a glance - Posted by the employer: Oct 1, 2026 - First seen by OpenNash: Oct 11, 2026 - Last checked: Oct 18, 2026 - Listed for: 17 days - Location: Sunnyvale, CA, United States - Work arrangement: On-site[Apply on Coherent’s careers site →](https://hcwp.fa.us2.oraclecloud.com/hcmUI/CandidateExperience/en/sites/CX_1/job/2015191) ## More jobs at Coherent ### [Lead Optical Component Engineer](https://jobs.opennash.com/companies/coherent/jobs/d942add9af97e5b52969/) Sunnyvale, CA, United States ### [Principal NPI Engineer](https://jobs.opennash.com/companies/coherent/jobs/d02ecec768818a002500/) Sunnyvale, CA, United States ### [Senior Fiber Optic Module Packaging Engineer](https://jobs.opennash.com/companies/coherent/jobs/58cc3bb376f2afa55d83/) Sunnyvale, CA, United States ### [Senior Manager, Operations](https://jobs.opennash.com/companies/coherent/jobs/fb1cfd34402e2ad6c272/) Sunnyvale, CA, United States ### [Member of Technical Staff](https://jobs.opennash.com/companies/coherent/jobs/4bca3cc21249173af7db/) Sunnyvale, CA, United States ## Similar jobs at other companies ### [Integration and Test - Test Engineer](https://jobs.opennash.com/companies/lockheed-martin/jobs/10fc5f7f3fdb2996dde3/) Lockheed Martin · Huntsville, AL ### [Integration and Test - Test Engineer Mid Career](https://jobs.opennash.com/companies/lockheed-martin/jobs/2bd35ab8a9f9692d725b/) Lockheed Martin · Huntsville, AL ### [Test Engineer | Space Systems Test (Secret Clearance Required)](https://jobs.opennash.com/companies/general-dynamics/jobs/8d4217cf241bd86a3f6c/) General Dynamics · Scottsdale, AZ, US ### [Senior System Test Engineer – Mechanisms and Test Scripts](https://jobs.opennash.com/companies/bae-systems/jobs/814185ee52a702b796bf/) BAE Systems · Boulder, Colorado, United States ### [Senior System Test Engineer - Mechanisms and Test Scripts - $10K Sign on Bonus](https://jobs.opennash.com/companies/bae-systems/jobs/867f12d230fd08f61e7e/) BAE Systems · Boulder, Colorado, United States [Jobs in Sunnyvale, CA](/locations/us/ca/sunnyvale/)[Jobs in California](/locations/us-ca/)[Operations jobs](/functions/operations/) OpenNash lists jobs from employers’ own careers sites and does not handle applications. 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