Sr Mechanical Design Engineer - Liquid Cooling Systems

Our client is seeking a Senior Mechanical Design Engineer - Liquid Cooling Systems to join their team. As a Sr. Mechanical Design Engineer,  you will be part of the Engineering organization supporting Infrastructure Engineering and related critical environment teams. The ideal candidate will have strong ownership mindset, cross-functional collaboration, and deep technical fluency in liquid cooling and hydraulic systems which will align successfully in the organization.

Job Title: Senior Mechanical Design Engineer -  Liquid Cooling Systems

Location: Redmond, WA | Fully Onsite

Contract: Up to 18 months

What's the Job?

• Lead the mechanical design of advanced liquid cooling and fluid distribution systems for modular AI data center platforms, owning cooling architecture from heat rejection through rack-level interfaces.
• Define scalable system boundaries and strategies for pumping, flow control, pressure management, balancing, redundancy, and performance across normal, part-load, maintenance, startup, and failure conditions.
• Perform and review hydraulic and mechanical calculations, including pipe sizing, pressure-drop analysis, pump-head and system-volume modeling for water- and glycol-based systems.
• Own and maintain P&IDs, mechanical schematics, equipment schedules, valve schedules, instrumentation requirements, basis-of-design documents, and standard details with disciplined revision control.
• Partner with manufacturing, controls, commissioning, supply chain, and field teams to translate requirements into repeatable designs that can be fabricated, deployed, serviced, and scaled across multiple sites.

What's Needed?

• 7+ years of experience designing mechanical cooling, hydraulic distribution, process cooling, or mission-critical infrastructure systems.
• Experience in data centers, semiconductor facilities, industrial process cooling, central utility plants, or comparable high-reliability environments.
• Strong technical knowledge of pipe sizing, pump selection, pressure-drop analysis, flow balancing, system volume, and hydraulic control.
• Proven experience developing and owning P&IDs, mechanical calculations, equipment schedules, valve schedules, and instrumentation requirements.
• Practical knowledge of chilled-water, condenser-water, glycol, or process-fluid systems, including design for commissioning, maintenance, isolation, flushing, venting, draining, and service access.

What's in it for me?

• Work on high-impact liquid cooling infrastructure that supports demanding, high-reliability environments for AI and other critical workloads.
• Build repeatable, standards-driven mechanical designs that shape product architecture and enable scalable deployment across multiple configurations.
• Collaborate across engineering, manufacturing, controls, commissioning, and field teams to solve complex system challenges with meaningful autonomy.
• Translate system requirements into designs that are manufacturable, testable, and serviceable—bridging engineering intent to real-world execution.
• Contribute to technical standards, interfaces, and commissioning practices that improve performance verification and reduce risk during startup and troubleshooting.

If this is a role that interests you and you'd like to learn more, click apply now and a recruiter will be in touch with you to discuss this great opportunity. We look forward to speaking with you!

About ManpowerGroup, Parent Company of: Manpower, Experis, Talent Solutions, and Jefferson Wells.

ManpowerGroup® (NYSE: MAN), the leading global workforce solutions company, helps organizations transform in a fast-changing world of work by sourcing, assessing, developing, and managing the talent that enables them to win. We develop innovative solutions for hundreds of thousands of organizations every year, providing them with skilled talent while finding meaningful, sustainable employment for millions of people across a wide range of industries and skills. Our expert family of brands – Manpower, Experis, Talent Solutions, and Jefferson Wells – creates substantial value for candidates and clients across more than 75 countries and territories and has done so for over 70 years. We are recognized consistently for our diversity - as a best place to work for Women, Inclusion, Equality and Disability and in 2023 ManpowerGroup was named one of the World's Most Ethical Companies for the 14th year - all confirming our position as the brand of choice for in-demand talent.