Job SummaryJob Description
To support our extraordinary teams who build great products and contribute to our growth, we're looking to add a
Senior Thermal Systems Engineer located in
Littleton, MA.Reporting to the
Product Manager the
Senior Thermal Systems Engineer will own the end-to-end architecture, analysis, validation, and deployment of direct-to-chip (D2C) cooling systems used to cool high-TDP CPUs/GPUs/accelerators. They will be the technical leader partnering with Product Management, Mechanical/Electrical Engineering, Manufacturing, Quality, Reliability, and key customers to deliver robust, scalable products that meet performance, reliability, and cost targets.
What a typical day looks like:Own thermal architecture & modeling
- Define system-level thermal requirements (TDP range, 9T, coolant temperature, flow rate, pressure drop, acoustic & power budgets).
- Apply first principles in fluid dynamics and heat transfer to analyze design concept thermal performance
- Build and validate 1D/3D models (e.g., FloEFD, Icepak, MacroFlow, ANSYS Fluent, COMSOL) for cold plates, manifolds, quick-disconnects (QDs), pumps, and CDUs.
- Perform sensitivity trade-offs (flow distribution, fin geometry, microchannel optimization, TIM selection, manifold topology).
Design liquid cooling subsystems
- Specify and refine cold plates, CDUs, manifolds, hoses/QDs, reservoirs, filters, sensors, and controls.
- Collaborate with ME/EE on mechanical stack-up, materials, corrosion mitigation (galvanic compatibility), and leak risk reduction.
- Define DFX (DFM/DFA/DFT) and lead EVT/DVT/PVT from prototypes to mass production.
Validate and qualify
- Develop test plans for thermal performance, pressure integrity, leak detection, long-term reliability (HALT/HASS), and contamination control (particulates, biogrowth).
- Execute lab and rack-scale testing (pump curves, flow balance, 9P mapping, heat load emulation, transient behavior).
- Drive failure analysis and corrective actions (FMEAs, 8D/PPS).
Partner across the business
- Work with Product Management on PRDs, roadmaps, and business cases.
- Support manufacturing process development (leak/pressure test stations, purge and fill, cleanliness criteria) and supplier selection/qualification.
- Engage with customers: define requirements, run pilots, analyze fleet telemetry, and support deployment at scale.
The experience we're looking to add to our team:- BS/MS in Mechanical Engineering or Aerospace Engineering or related field (PhD a plus).
- 5+ years experience in thermal design/validation for high-power electronics (preferably data center/server/HPC).
- Excellent first principles knowledge in fluid dynamics, thermodynamics, and heat transfer
- Proven expertise in liquid cooling, including CFD, pressure drop/flow modeling, and thermal metrology.
- Hands-on with lab instrumentation (flow meters, pressure transducers, thermocouples/RTDs, DAQ, leak detectors) and test automation (Python, LabVIEW, or similar).
- Experience bringing products from EVT 9 DVT 9 PVT 9 ramp, including DFX and supplier engagement.
- Excellent technical communication and documentation skills.
BO18
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 06-22-2026 Job Posting End Date
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.
$126,500.00 USD - $173,900.00 USD Annual
Job CategoryDesign, Process & Technology Engineering
Is Sponsorship Available?
No
