Senior Principal Thermal Engineer (Liquid Cooling)

Location: Onsite in Roseville or Sunnyvale, California, United States

Salary: USD 181,000–367,000 annual base salary in California; variable incentives may also be offered.

Company

hirify.global is a global edge-to-cloud technology company developing networking, compute, data, and cloud infrastructure solutions.

What you will do

• Define organization-wide thermal architectures, design methodologies, specifications, validation practices, and long-range technology roadmaps for liquid-cooled hardware.
• Lead direct-to-chip, cold-plate, manifold, coolant-distribution, immersion, hybrid air-liquid, and emerging two-phase cooling solutions.
• Lead system-level thermal architecture, analysis, and design from concept and feasibility through qualification, NPI, manufacturing ramp, and sustaining engineering.
• Perform and direct thermal-fluid CFD modeling, correlate models with test data, and translate results into design decisions and margin improvements.
• Define requirements and oversee validation testing across components, subsystems, chassis, racks, and facility interfaces, including root-cause investigations.
• Coordinate cross-functional teams, suppliers, development partners, manufacturing processes, program plans, technical escalations, innovation, intellectual property, standards contributions, and engineering mentorship.

Requirements

• Bachelor’s or master’s degree in Mechanical Engineering, Thermal Sciences, or a closely related engineering discipline. An advanced degree is preferred.
• Typically 15+ years of relevant engineering experience for the Senior Principal level.
• Extensive hands-on experience leading electronics thermal design and liquid-cooling development for complex products.
• Demonstrated technical impact on significant products, programs, or strategic architecture, including successful delivery across multiple NPI cycles.
• Deep expertise in single-phase liquid cooling and strong knowledge of immersion, dielectric fluids, refrigerant-based or two-phase technologies, and air-liquid hybrid architectures.
• Expert knowledge of heat transfer, fluid mechanics, thermal resistance, boiling and dry-out limits, flow distribution, pressure drop, pump and heat-exchanger performance, and system controls.
• Strong knowledge of cold-plate and manifold design, materials, joining and sealing, leak and proof-pressure testing, cleanliness, corrosion, coolant chemistry, reliability, and field service considerations.
• Advanced capability with CFD and thermal-network tools, plus proficiency with CAD tools such as SolidWorks or equivalent; able to define modeling, calibration, correlation, and validation methods.
• Experience designing for cost, manufacturability, reliability, safety, serviceability, energy efficiency, and sustainability, along with strong analytical problem-solving and engineering judgment.
• Business acumen and program leadership, including prioritization, risk management, resource planning, supplier engagement, negotiation, and strong written, verbal, and presentation skills.

Nice to have

• Evidence of innovation through patents, publications, standards contributions, or deployment of differentiated cooling technologies.

Culture & Benefits

• Onsite work from an HPE office in Roseville or Sunnyvale.
• Health, financial, and emotional wellbeing benefits for employees and their loved ones.
• Personal and professional development programs supporting career growth and subject-matter expertise.
• Inclusive workplace that values varied backgrounds and individual uniqueness.