Lead Mechanical Engineer, Data Center DesignThis is a full-time, on-site role located in Austin, TX.SummaryThe Lead Mechanical Engineer will serve as a senior technical leader responsible for defining and driving the mechanical cooling strategy across a large-scale portfolio of hyperscale AI data center developments. This owner‑side engineering role oversees mechanical system design from chip to chiller, including chilled water systems, liquid cooling architectures, thermal management, and heat rejection infrastructure supporting high‑density GPU environments. The ideal candidate brings deep expertise in mission‑critical cooling systems, large‑scale data center design, and cross‑functional leadership across engineering, construction, and vendor teams.Our Ideal Candidate10+ years of experience designing mechanical and cooling systems for data centers, hyperscale infrastructure, or high‑performance computing facilitiesBachelor's degree in Mechanical Engineering or related technical disciplineDeep expertise in chilled water systems, air‑cooled and water‑cooled chillers, direct liquid cooling, and heat rejection plant designExperience leading mechanical engineering teams and managing external MEP consultants throughout the full project lifecycleStrong understanding of ASHRAE TC 9.9 thermal guidelines and applicable mechanical codes including IMC, ASME, and NFPAExperience developing and enforcing engineering standards, basis of design documentation, and master specifications across multi‑site programsStrong vendor management and procurement experience related to chillers, pumps, piping systems, and cooling distribution equipmentAbility to coordinate across electrical, controls, structural, and construction disciplines in fast‑paced development environmentsWillingness to travel to project sites across the United States (approximately 20‑30%)Professional Engineer (PE) license or Chartered Engineer credential preferredExperience with modular or prefabricated mechanical system design preferredHands‑on CFD modeling experience using tools such as 6SigmaET, Ansys Icepak, or Flotherm preferredFamiliarity with Revit and BIM coordination workflows preferredExperience supporting medium‑voltage chiller systems and high‑density compute environments preferredKnowledge of AI/HPC cooling challenges including high rack densities and GPU thermal management preferredResponsibilitiesDefine and lead the mechanical cooling strategy for large‑scale AI and hyperscale data center developmentsOversee design and implementation of chilled water systems, direct liquid cooling systems, heat rejection infrastructure, and thermal management solutionsDevelop and maintain mechanical engineering standards, basis of design documents, and technical specifications across multiple projectsLead and mentor mechanical engineering teams while coordinating external engineering consultants and vendor partnersCollaborate with electrical, structural, controls, and construction teams to ensure integrated infrastructure deliverySupport development of modular and prefabricated mechanical systems designed for rapid deployment and scalabilityReview and approve engineering calculations, drawings, equipment selections, and construction documentationCoordinate procurement strategy and technical evaluations for chillers, pumps, piping systems, and cooling distribution equipmentParticipate in commissioning activities including chilled water plant startup, flushing programs, hydraulic balancing, and system validationSupport site visits, construction oversight, issue resolution, and technical decision‑making throughout project executionDrive continuous improvement initiatives related to cooling efficiency, reliability, scalability, and deployment speedCompensation & BenefitsPay for this position ranges from approximately $144.23/hr - $168.27/hr based on experience, skills, qualifications, and location.Medical Coverage: Two United Healthcare plans (PPO and HDHP with HSA), with employer contributions toward premiums; coverage begins the 1st of the month after 60 days of employmentDental & Vision: United Healthcare dental with 100% preventive care coverage and vision benefits for exams, frames, lenses, or contactsWellbeing Support: Employee Assistance Program (EAP) offering confidential counseling plus additional wellness and care navigation resourcesRetirement & Savings: 401(k) eligible after 30 days with automatic 6% enrollment (opt‑out available), 1% annual increases up to 10%, plus HSA with up to $480 employer contributionVoluntary Benefits: Employee‑paid accident insurance and critical illness coverage for major health eventsFlux Resources values applicants of all backgrounds and experiences. We do not discriminate based on race, color, national or ethnic origin, ancestry, age, religion or religious creed, disability or handicap, sex or gender, gender identity and/or expression, sexual orientation, military or veteran status, genetic information, or any other characteristic protected under applicable federal, state, or local law.#J-18808-Ljbffr