Thermal Engineer –Liquid Cooling

Amphenol Communications Solutions; Markham; On-site; CAD 85,000 - 140,000; Full time

Benefits offered by this job

Health insurance

Pension plan

Incentive plans

Talent development

Recreation club

Job summary

Amphenol Communications Solutions is seeking a Thermal Engineer – Liquid Cooling in Markham, ON to lead liquid‑cooling design for high‑density front‑end I/O systems. You will develop cold plates, optimize microchannel geometries, and validate designs with CFD simulations and lab testing.

The role requires 4+ years in thermal design for electronic systems, proficiency in Icepak/FloTHERM, and CAD skills in SolidWorks or Creo.

Qualifications

• Bachelor's or Master's degree in Mechanical Engineering, Thermal Engineering, or a related field.
• 4+ years of industry experience in active and advanced cooling technologies.
• Experience developing liquid cooling solutions for high-speed connectors and front-panel I/O systems.
• Proficiency with CFD/thermal simulation tools (ANSYS Icepak, FloTHERM or similar).
• CAD experience with SolidWorks or Creo.

Responsibilities

• Architect and develop liquid-cooled cold plates for high-density front-end I/O connector and interconnect applications.
• Design and optimize microchannel structures, flow paths, and geometries for thermal performance with low pressure drop.
• Collaborate with mechanical and connector design teams for manufacturability and integration.
• Engage with customers to gather boundary conditions and translate into simulation strategies.
• Develop CFD thermal models, analyze temperature distribution and flow behavior.
• Plan and conduct thermal performance testing with lab teams and validate results.

Skills

Liquid cooling

CFD/thermal simulation

Heat exchangers

Data center hardware

SolidWorks/Creo

Thermal instrumentation

Education

Mechanical Engineering degree

Tools

ANSYS Icepak

FloTHERM

SolidWorks

Creo

Job description

Location: Markham, ON Department: Engineering Posted: 8/11/2026 Location Name: HSIO-Markham

Wage Max: 140,000.00 Wage Min: 85,000.00

Amphenol Communications Solutions (ACS), a division of Amphenol Corporation, is a world leader in interconnect solutions for Communications, Mobile, RF, Optics, and Commercial electronics markets. Amphenol Corporation is one of the world’s largest designers and manufacturers of electrical, electronic and fiber optic connectors and interconnect systems, antennas, sensors and sensor-based products and coaxial and high-speed specialty cable. ACS has an expansive global presence in research and development, manufacturing, and sales. We design and manufacture a wide range of innovative connectors as well as cable assemblies for diverse applications including server, storage, data center, mobile, RF, networking, industrial, business equipment, and automotive.

We are seeking a highly motivated and experienced Thermal Engineer – Liquid Cooling to join our Front-End I/O Active Thermal Solutions team. This role focuses on the design, simulation, validation, and optimization of liquid-based active cooling solutions for high-speed interconnect and front-panel I/O systems used in data center and high-performance computing environments. The ideal candidate will work closely with customers and cross‑functional engineering teams to define thermal requirements, develop robust liquid cooling architectures, perform advanced thermal simulations, and validate designs through laboratory testing. This role delivers production‑ready thermal solutions that meet performance, reliability, and manufacturability targets.

Key Responsibilities

Design & Development

• Architect and develop liquid‑cooled cold plates for high‑density front‑end I/O connector and interconnect applications.
• Design and optimize microchannel structures, flow paths, and cold plate geometries to maximize thermal performance while minimizing pressure drop.
• Select and integrate materials compatible with high heat flux, corrosion resistance, and long‑term reliability in data center environments.
• Collaborate with connector and mechanical design teams to ensure mechanical integration, tolerance alignment, and manufacturability.

Customer Engagement

• Work directly with customers to gather thermal boundary conditions, system constraints, and performance requirements.
• Translate customer needs into thermal simulation strategies, validation plans, and design trade‑offs.
• Serve as a technical interface to explain thermal concepts, design decisions, and test results.

Thermal Simulation & Analysis

• Develop and execute CFD thermal models using tools such as ANSYS Icepak, FloTHERM, or equivalent.
• Analyze temperature distribution, heat dissipation, and fluid flow behavior in liquid cooled front‑end I/O environments.
• Perform sensitivity studies and optimization analyses to ensure designs meet performance margins.

Experimental Validation

• Partner with lab and test engineers to plan and conduct thermal performance and flow validation testing.
• Correlate experimental data with simulation results to validate and refine models.
• Conduct root‑cause analysis and iterative design improvements to resolve thermal issues.

Optimization & Technical Reporting

• Optimize thermal designs considering performance, cost, reliability, and manufacturability.
• Prepare detailed technical reports and presentations summarizing simulations, test results, and design recommendations.
• Present optimized solutions and findings to customers and internal stakeholders.

Qualifications

Education & Experience

• Bachelor's or Master's degree in Mechanical Engineering, Thermal Engineering, or a related field.
• Strong experience in thermal design or analysis for electronic systems, interconnects, or data center hardware.

Technical Skills

• At least 4 years of industry experience in active and advanced cooling technologies, including cold plates, heat exchangers, heat pipes, or vapor chambers. (Must Have)
• Experience developing liquid cooling solutions for high‑speed connectors, modules, or front‑panel I/O systems. (Must Have)
• Strong proficiency with CFD and thermal simulation tools (ANSYS Icepak, FloTHERM, or similar). (Must Have)
• Experience with thermal instrumentation and data acquisition, including thermocouples, flow sensors, and IR imaging.
• Experience with CAD tools such as SolidWorks, Creo, or equivalent. (Must Have)
• Solid understanding of heat transfer, fluid dynamics, and electronic packaging.
• Excellent written and verbal communication skills for customer‑facing technical discussions.

Preferred Qualifications

• Understanding of electrical, mechanical, and thermal trade‑offs in system‑level integration.
• Experience with Design of Experiments (DOE) or statistical optimization methods.
• Strong analytical, problem‑solving, and troubleshooting skills.
• Ability to manage multiple projects in a fast‑paced development environment.

Why Work for Us?

• Benefits Coverage: Comprehensive health, dental, vision, and travel insurance.
• Health Care Spending Account: Additional financial support for health‑related expenses.
• Pension Plan: Company‑supported pension scheme.
• Incentive Plans: Progressive employee incentive plans.
• Talent Development: Opportunities for professional growth and development.
• Company Recreation Club: Participate in fun activities, draws with exciting prizes, summer BBQs, holiday parties, and more!

The base salary range for this position is $85,000- $140,000 annually. In determining the rate of pay, Amphenol considers a variety of nondiscriminatory factors, including but not limited to geographic location, relevant industry experience, qualifications, skills, and education. It would be rare for an individual to be hired at or near the top of the range for a given role. Base salary is one facet of Amphenol's total rewards package which includes participation in our comprehensive benefits program with medical, dental, and vision benefits, vacation, sick leave, paid holidays, life insurance, short/long term disability, and membership in our Defined Contribution Pension Plan.

Amphenol Corporation is proud of our reputation as an excellent employer. Our main focus is to provide the highest level of support and responsiveness to both our employees and our customers. Amphenol Corporation offers the opportunity for career growth within a global organization. We believe that Amphenol Corporation is unique in that every employee, regardless of his or her position, has the ability to positively impact the business.

Amphenol Canada is committed to developing inclusive, barrier‑free selection processes and work environments. If contacted in relation to a job opportunity, you should advise Amphenol, in a timely fashion, of the accommodation measures which must be taken to enable you to be assessed in a fair and equitable manner. Information received relating to accommodation measures will be addressed confidentially.

For additional company information please visit our website at https://www.amphenol-cs.com/.

Amphenol is an "Equal Opportunity Employer" - Minority/Female/Disabled/Veteran/Sexual Orientation/Gender Identity/National Origin.