Presales Engineer - Liquid Cooling

Flex is the diversified manufacturing partner of choice that helps market-leading brands design, build and deliver innovative products that improve the world. A career at Flex offers the opportunity to make a difference and invest in your growth in a respectful, inclusive, and collaborative environment. If you are excited about a role but don't meet every bullet point, we encourage you to apply and join us to create the extraordinary.JetCool, a Flex Company, delivers patented direct‑to‑chip liquid cooling solutions purpose‑built for AI and high‑density compute environments. Powered by JetCool’s proprietary microconvective cooling technology and full‑stack portfolio—from SmartPlates to Coolant Distribution Units (CDUs)—we enable leading processor and system designers to push performance, efficiency, and reliability to new limits.The Pre-Sales Engineer based in either Littleton, MA, Austin, TX or Milpitas, CA serves as a technical advisor to customers requiring liquid cooled Cold Plates (SmartPlates) and Cooling Distribution Units (CDU), bridging thermal and mechanical engineering depth with clear, confident customer communication. This role owns pre‑sales technical engagement ensuring JetCool solutions meet customer thermal performance and AI System and Rack integration needs. Success in this role requires the ability to communicate complex fluid‑dynamics and heat‑transfer Engineering analysis into concise, customer‑ready explanations, while adapting technical depth in real time based on audience and context.What a Typical Day Looks Like:Lead technical discovery conversations to understand customer thermal requirements for AI SystemsServe as the primary technical interface in customer engagementsSupport sales engagements including RFP/RFQ responses and drafting content.Gather the customer requirements and technical documents for Engineering to develop the liquid cooling solutionPartner with Engineering in understanding and communicating the liquid cooling solutionEvaluate AI system‑level integration across cold plates, manifolds, CDUs, and rack‑level cooling solutionsDevelop and deliver technical presentations highlighting JetCool’s technologies’ differentiationPresent thermal technical analyses in a clear, customer‑consumable format for both engineers and procurement managers“Read the room” and adjust technical depth, pacing, and messaging based on audience feedbackThe Experience We’re Looking to Add to Our Team: B.S. Mechanical EngineeringFoundation in fluid mechanics or heat transfer (experience with both preferred)3+ years of industry experience, including pre-sales, engineering, or customer facing technical rolesExperience working with fluid based mechanical designsStrong communication and presentation skills Exposure to CFD analysis tools (e.g., ANSYS, Icepak, FloTHERM) is preferred but not requiredApply fundamentals of fluid mechanics and heat transfer to help JetCool Engineering develop liquid cooling solutions to meet customer requirements is preferred-SiteFlex is an Equal Opportunity Employer and employment selection decisions are based on merit, qualifications, and abilities. We do not discriminate based on: age, race, religion, color, sex, national origin, marital status, sexual orientation, gender identity, veteran status, disability, pregnancy status, or any other status protected by law. We're happy to provide reasonable accommodations to those with a disability for assistance in the application process. Please email accessibility@flex.com and we'll discuss your specific situation and next steps (NOTE: this email does not accept or consider resumes or applications. This is only for disability assistance. To be considered for a position at Flex, you must complete the application process first).