Lead Mechanical Engineer, Data Center Design

This is a full-time, on-site role located in Austin, TX.

Summary

The 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 Candidate
 

• 10+ years of experience designing mechanical and cooling systems for data centers, hyperscale infrastructure, or high-performance computing facilities
• Bachelor’s degree in Mechanical Engineering or related technical discipline
• Deep expertise in chilled water systems, air-cooled and water-cooled chillers, direct liquid cooling, and heat rejection plant design
• Experience leading mechanical engineering teams and managing external MEP consultants throughout the full project lifecycle
• Strong understanding of ASHRAE TC 9.9 thermal guidelines and applicable mechanical codes including IMC, ASME, and NFPA
• Experience developing and enforcing engineering standards, basis of design documentation, and master specifications across multi-site programs
• Strong vendor management and procurement experience related to chillers, pumps, piping systems, and cooling distribution equipment
• Ability to coordinate across electrical, controls, structural, and construction disciplines in fast-paced development environments
• Willingness to travel to project sites across the United States (approximately 20–30%)
• Professional Engineer (PE) license or Chartered Engineer credential preferred
• Experience with modular or prefabricated mechanical system design preferred
• Hands-on CFD modeling experience using tools such as 6SigmaET, Ansys Icepak, or Flotherm preferred
• Familiarity with Revit and BIM coordination workflows preferred
• Experience supporting medium-voltage chiller systems and high-density compute environments preferred
• Knowledge of AI/HPC cooling challenges including high rack densities and GPU thermal management preferred

• Define and lead the mechanical cooling strategy for large-scale AI and hyperscale data center developments
• Oversee design and implementation of chilled water systems, direct liquid cooling systems, heat rejection infrastructure, and thermal management solutions
• Develop and maintain mechanical engineering standards, basis of design documents, and technical specifications across multiple projects
• Lead and mentor mechanical engineering teams while coordinating external engineering consultants and vendor partners
• Collaborate with electrical, structural, controls, and construction teams to ensure integrated infrastructure delivery
• Support development of modular and prefabricated mechanical systems designed for rapid deployment and scalability
• Review and approve engineering calculations, drawings, equipment selections, and construction documentation
• Coordinate procurement strategy and technical evaluations for chillers, pumps, piping systems, and cooling distribution equipment
• Participate in commissioning activities including chilled water plant startup, flushing programs, hydraulic balancing, and system validation
• Support site visits, construction oversight, issue resolution, and technical decision-making throughout project execution
• Drive continuous improvement initiatives related to cooling efficiency, reliability, scalability, and deployment speed

• The pay 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 employment
• Dental & Vision: United Healthcare dental with 100% preventive care coverage and vision benefits for exams, frames, lenses, or contacts
• Wellbeing Support: Employee Assistance Program (EAP) offering confidential counseling plus additional wellness and care navigation resources
• Retirement & 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 contribution
• Voluntary Benefits: Employee-paid accident insurance and critical illness coverage for major health events

Equal Opportunity Statement

Flux 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.