Associate Principal Engineer, Mechanical Engineering

Flex•Austin, TX

6d•Onsite

About The Position

Flex is seeking an Associate Principal Engineer, Mechanical Engineering in Austin, TX to support SpinCo, a new independent company focused on critical digital infrastructure, delivering end-to-end power and thermal management solutions for AI data centers and other mission-critical applications. This role will serve as a technical leader responsible for the mechanical architecture, design, analysis, validation, and implementation of next-generation AI infrastructure platforms. The position drives the development of scalable, manufacturable, and reliable infrastructure solutions from concept and prototype through validation, manufacturing readiness, and deployment. The role provides engineering leadership across rack systems, enclosures, thermal-mechanical integration, liquid cooling, structural design, and modular infrastructure platforms, while influencing technology strategy and engineering standards across multiple programs and functions.

Requirements

Bachelor’s degree in Mechanical Engineering, Aerospace Engineering, Mechatronics, or a related engineering discipline; Master’s degree preferred.
10+ years of experience in mechanical engineering, infrastructure engineering, product development, or complex hardware system design environments.
Proven experience leading mechanical designs from requirements through concept development, validation, manufacturing readiness, and deployment.
Strong expertise in mechanical architecture, structural design, thermal-mechanical integration, DFM/DFA, reliability engineering, and complex electromechanical systems.
Experience with rack systems, enclosures, liquid cooling integration, power infrastructure interfaces, modular systems, and serviceability-focused design.
Demonstrated success leading cross-functional engineering initiatives, influencing technical decisions, and resolving complex system-level integration challenges.
Excellent customer-facing, leadership, communication, analytical, and problem-solving skills, with the ability to mentor engineers and drive technical excellence across multiple programs.

Responsibilities

Lead mechanical architecture development for AI infrastructure platforms, including racks, enclosures, chassis, structural systems, and modular infrastructure solutions.
Design and integrate mechanical systems supporting liquid cooling, power distribution, compute platforms, networking, controls, cable management, and serviceability requirements.
Define mechanical requirements, interface specifications, design standards, tolerance models, and reusable platform architectures.
Lead structural analysis, design trade studies, reliability assessments, DFM/DFA reviews, and thermal-mechanical optimization initiatives.
Partner with Systems, Electrical, Cooling, Software, Validation, Manufacturing, Quality, Supply Chain, and supplier teams to resolve integration challenges and optimize platform performance.
Drive prototype builds, design verification, validation activities, manufacturing readiness reviews, field deployment support, and failure analysis investigations.
Evaluate emerging technologies, materials, and manufacturing methods while mentoring engineering teams and advancing mechanical engineering best practices across the organization.