Senior Thermal Engineer
Coherent
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PA, United States · Posted September 15, 2026
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About the job
Primary Duties & Responsibilities
Possess a solid understanding of heat-transfer and thermal analysis & testing fundamentals
Create Flotherm thermal models based on the Design Engineer’s Solidworks assemblies
Determine the appropriate level of detail required for achieving accurate thermal simulation results
Perform Flotherm thermal simulations with the goal of determining assembly hot-spot locations and internal component thermal margins
Analyze thermal gradients and determine reliability margin within detailed SMT semiconductor and optical packages
Perform lab testing with prototype and production hardware to verify and support thermal simulation results
Export Flotherm models for customer use and support customer questions related to the product’s thermal performance and design
Review production data for temperature reporting accuracy and determine calibration factors required to maintain accurate temperature reporting
Analyze and propose cutting edge heat-dissipation materials and methods, such as thermal interface materials, heat-pipes, vapor-chambers, etc…
Generate clear and concise reports summarizing thermal simulations and test results
Perform 3D modeling of parts, assemblies and drawings using Solidworks (preferred)
Interface with Electrical Engineers for collaboration on printed circuit board design layout
Attend weekly meetings and design reviews as required
Provide feedback, alternate ideas and suggestions that could improve product quality and overall company productivity
Education & Experience
Education should consist of B.S. degree (minimum) with a major in Mechanical Engineering or general Engineering\Science.
5yrs minimum experience in thermal design\analysis or related field
Skills
Must be a highly motivated self-starter with good communication skills that can excel in a fast-paced high-tech environment
Must be proficient with Siemens Flotherm (XT and\or standard)
Thermal analysis (hand calculations and computer simulation) knowledge required
Must be proficient with Microsoft Office
3D Solid Modeling (Solidworks) experience preferred
Should be well versed with hands-on assembly and disassembly of mechanical assemblies
Solid understanding on the safe use of basic hand tools and machine shop equipment
Must be able to work both independently, as well as part of a team
Working Conditions
This role will be based on-site in Horsham, PA
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 well both verbally and in writing.
Mobility within the office environment to attend meetings or interact with colleagues.
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 .
Coherent is a global leader in lasers, engineered materials and networking components. We are a vertically integrated manufacturing company that develops innovative products for diversified applications in the industrial, optical communications, military, life sciences, semiconductor equipment, and consumer markets. Coherent provides a comprehensive career development platform within an environment that challenges employees to perform at their best, while rewarding excellence and hard-work through a competitive compensation program. It's an exciting opportunity to work for a company that offers stability, longevity and growth. Come Join Us!
Note to recruiters and employment agencies: We will not pay for unsolicited resumes from recruiters and employment agencies unless we have a signed agreement and have required assistance, in writing, for a specific opening.