The Principal Mechanical Design Engineer (Data Center Infrastructure) is a technical leader responsible for the architecture, integration, and validation of advanced mechanical systems supporting hyperscale data center environments. This role requires deep expertise in liquid cooling technologies (single-phase and two-phase), hydronic system design, structural integration, and manufacturable rack-level infrastructure solutions. This role is responsible for defining system performance requirements, developing technical specifications, selection and integration of critical components, and leading mechanical design from concept through production release. Responsibilities include wetted material selection, thermal and structural analysis, fastening strategies, component layout, and design for manufacturability. Partners cross-functionally to deliver reliable, scalable, and cost-effective Data Center Infrastructure solutions while advancing innovation in liquid cooling performance. Job Title: Principal Mechanical Integration Engineer Organization: Data Center Infrastructure Team Location: Remote* OR Austin, TX *Requires up to 25% domestic and/or international travel (rare) What will you do? • Lead the end-to-end mechanical design and engineering of hyperscale Data Center Infrastructure (DCI) systems, including liquid-cooled rack assemblies, CDUs, manifolds, enclosures, structural frames, and associated hydronic piping systems. • Serve as the technical authority for single-phase and two-phase liquid cooling architectures, including primary and secondary loop design, in-rack distribution, and system integration within hyperscale data center environments. • Define and validate operational performance requirements for liquid-cooled infrastructure, including pressure ratings, hydrostatic limits, temperature ranges, flow rates and uniformity, thermal expansion, durability, and serviceability. • Design, analyze, and validate machined components, welded fabrications, manifolds, and structural systems using advanced engineering principles, including stress analysis, finite element analysis (FEA), flow modeling, and structural load calculations to ensure mechanical integrity and code compliance. • Lead wetted material selection and compatibility analysis for liquid cooling systems, including corrosion mitigation strategies, surface treatments, cleanliness standards, and long-term durability considerations. • Develop and review CAD models and complete technical data packages using CREO, SolidWorks, or equivalent tools; ensure design accuracy, manufacturability, and system-level integration. • Author and approve technical specifications for piping systems, rack-level cooling infrastructure, and hydronic components, including installation guidelines, maintenance procedures, testing requirements, and compliance with applicable standards (ASME, ISO). • Establish and oversee validation protocols including hydrostatic pressure testing, leak detection and mitigation, flow resistance analysis, and corrosion verification to ensure regulatory compliance and operational reliability. • Evaluate customer design proposals and technical specifications to assess feasibility, manufacturability, cost, and risk; provide recommendations to optimize performance and total cost of ownership. • Lead cross-functional design reviews with electrical, thermal, manufacturing, quality, and supply chain teams to ensure full system integration and compliance with product specifications and applicable plumbing and hydronic codes. • Optimize rack manifold design and manufacturing processes, including machining, welding, surface finishing, connection interfaces, venting and draining strategies, and flow path optimization to enhance performance and manufacturability. • Drive continuous improvement in manufacturing assembly methods and tooling in collaboration with production teams and equipment vendors to improve quality, scalability, and cost efficiency. • Lead root cause investigations for complex mechanical failures identified during validation or field deployment and implement corrective design improvements. • Provide technical leadership in vendor qualification and management for mechanical components and liquid cooling subsystems. • Identify and mitigate technical risks impacting performance, schedule, or cost, and contribute to R&D initiatives advancing liquid cooling technologies and system innovation. • Apply modular data center design principles to liquid cooling integration - standardized, repeatable mechanical packages that can be built, tested, and validated in a factory environment prior to shipment. • Design cooling systems for prefabricated and skid-mounted deployment, accounting for transport and vibration loads, shipping envelope constraints, and inter-module connection interfaces. MINIMUM QUALIFICATIONS Education: • Bachelor's degree in Mechanical Engineering, Systems Engineering, or a related engineering discipline from an accredited university. Experience: • 8 years' experience in mechanical design and integration of mission-critical systems. • Proven track record of successful system designs and implementations in a relevant industry • Strong understanding of mechanical systems, integration strategy, and system coordination • Familiarity with industry standards and regulations related to Energy Storage Systems and Data Center Infrastructure is preferred. • Excellent problem-solving skills and attention to detail • Strong communication and teamwork abilities PREFERRED QUALIFICATIONS • Master's Degree in Mechanical Engineering • Professional Engineer (PE) License • Hands-on experience designing liquid cooling systems for modular/prefabricated data center deployments, including factory acceptance testing (FAT) and site integration. The pay range for this role is $132,400 - $238,400. Job-related, non-discriminatory factors used to determine the actual offered rate include qualifications and experience, geographic location, education, external market data, and consideration of internal equity. The anticipated close date of this job requisition is: October 31, 2026. As part of the total rewards package, this position is eligible for a short-term incentive based on performance. In addition, Jabil offers benefits to enhance your health, wealth, and resilient self. These include medical, dental, and vision insurance plans; paid time off accruing at a rate of 3.07 hours during your first year of employment; 4 weeks of paid parental leave; in 2027, 11 company-paid holidays (9 fixed holidays and 2 optional floating holidays), subject to change yearly; 401(k) retirement plan; and employee stock purchase plan.