Liquid Cooling Mechanical Engineer

If you are unable to complete this application due to a disability, contact this employer to ask for an accommodation or an alternative application process.

Full Time Austin, TX, US

2 days ago Requisition

Liquid Cooling Mechanical Engineer

Interested in getting in at the ground floor of a new, disruptive company attacking an important multi-billion-dollar problem? Businesses and consumers continue to demand increasing data services at an exponential rate -- streaming, deep learning, analytics, loT connectivity, and more. What this means is higher performing CPUs, components, servers, and ultimately Data and Edge computing centers, all generating excessive heat that is increasingly difficult to manage with traditional cooling systems.

Accelsius is developing revolutionary direct-to-chip, 2-Phase cooling technologies that empower and enable Server OEMs, Data Centers, and Edge Computing Operators, to meet performance, sustainability, scale, and cost goals while serving this high-growth market for data services.

Accelsius is looking for a Liquid Cooling Mechanical Engineer to design server-level liquid cooling hardware for AI and HPC platforms: cold plate loops, server plumbing, manifolds, and the pressure-containing assemblies that connect them. This engineer will take designs from first prototype through production release, translating thermal engineers’ prototypes into manufacturable hardware, and will work alongside our R&D technicians to validate them in the lab.

This position will report directly to the Server Cooling Product Manager and the right candidate will be hands-on, self-directed, and comfortable owning a design across engineering, manufacturing, suppliers, and customer teams.

Design and CAD (70%)

• Review thermal engineers’ concept and first-prototype designs to confirm a path to manufacturability
• Translate first-prototype server liquid cooling assemblies for GPU and CPU platforms into production-ready designs, including cold plate loops, tubing and hose routing, manifolds, fittings, and quick disconnects, within the space, serviceability, and interface constraints of OEM server chassis
• Design pressure boundaries: select materials, joining methods, and fittings; establish design, proof, and burst pressures; confirm compatibility with the working fluid
• Partner with thermal engineers on plumbing sizing, pressure drop, and flow distribution, contributing packaging constraints, component selection, and manufacturability input to their analysis
• Perform FEA to evaluate deformation and stress in pressure-containing parts and assemblies
• Produce production-ready 3D models, drawings with GD&T, and BOMs; manage revisions through ECOs in our PLM system
• Work with cold plate suppliers, braze shops, and fabricators from RFQ through first article; drive DFM and resolve supplier issues
• Lead design reviews and mentor early-career engineers on server plumbing design
• Support OEM and customer engagements with integration drawings and interface specifications

Test and Validation Support (30%)

• Define test requirements and acceptance criteria for pressure, leak, flow, and pressure drop testing
• Define requirements for test fixtures and hardware, and review the manufacturing team’s fixture designs against them
• Support R&D technicians in building and running tests on our R&D test rigs
• Review test data, lead root cause investigations on failures, and carry findings into the next design revision

• 5+ years of experience with progressively increasing responsibility
• Bachelor’s degree in mechanical engineering or similar required
• Direct experience designing liquid cooling hardware for data center servers or racks required…