Senior Mechanical Engineer — Liquid Cooling & Testing

Sanmina; San Jose (CA); On-site; USD 100,000 - 140,000; Full time

Benefits offered by this job

Health insurance

Life and disability insurance

Savings plan

Company paid holidays

Paid time off (PTO)

RSU awards

Discretionary bonus program

Job summary

Sanmina Corporation is seeking a Senior Mechanical / Testing Engineer to oversee testing and quality protocols for advanced liquid cooling infrastructure. You will validate cooling loop integrity, characterize mechanical and chemical performance, and ensure integration between hardware, facility fluid loops, and networked control architectures.

The role requires hands-on testing of CDUs, AALCs, cold plates, and manifolds, plus experience with Dowfrost and PG25/LC25 coolants.

Qualifications

• Bachelor’s degree in Industrial or Mechanical Engineering.
• Minimum 8 years of related experience with CDU cooling systems.
• Experience with PG25/LC25 coolants and Dowfrost quality metrics.
• Knowledge of fluid measurement instrumentation and basic networking concepts.

Responsibilities

• Hands-on operation, testing, and validation of CDUs, AALCs, cold plates, and manifolds.
• Conduct routine chemical analysis of LC25/PG25 coolants and ensure safe handling.
• Use pressure transducers for N2 decay testing to verify loop tightness.
• Analyze flow dynamics and determine filter sizing and life-cycle replacement schedules.
• Design and evaluate facility-level liquid cooling loops and compatibility of connectors.

Education

Bachelor's degree in Industrial Engineering or Mechanical Engineering

Tools

CDUs

AALCs

Cold plates

Manifolds

Dowfrost

LC25/PG25 coolants

Nephelometers

pH meters

Refractometers

Conductivity sensors

Job description

Sanmina Corporation is seeking a Senior Mechanical / Testing Engineer to oversee testing and quality protocols for advanced liquid cooling infrastructure. You will validate cooling loop integrity, characterize mechanical and chemical performance, and ensure integration between hardware, facility fluid loops, and networked control architectures.

The role requires hands-on testing of CDUs, AALCs, cold plates, and manifolds, plus experience with Dowfrost and PG25/LC25 coolants.