Data Center MEP Engineer

About Millennium Millennium is a global, diversified alternative investment firm, founded in 1989. Defined by evolution, innovation and focus, Millennium’s mission is to deliver results for our investors.

Our people are empowered with both independence and support: the autonomy to pursue ideas with conviction and the backing of a global network committed to collaboration, disciplined risk management and continuous learning. With opportunities to deepen expertise and accelerate development, talent at Millennium is equipped to adapt, evolve and build lasting impact over time. Discover how transformative growth accelerates impact.

Meet the Team Core to the health and growth of our business, Millennium’s Information Technology organization supports a flexible, scalable technology environment powered by advanced proprietary systems and the continued development of next-generation analytical and trading capabilities. The global Network & Data Center organization supports Millennium’s expanding data center portfolio and critical infrastructure, with responsibility for resilient mechanical, electrical, and cooling systems that enable high-density compute environments.

What You'll Do

• Lead the end-to-end design, commissioning, operation, and continuous improvement of liquid cooling infrastructure, including direct liquid cooling, cold-plate assemblies, rear-door heat exchangers, and related systems
• Develop hydraulic models, heat-load calculations, and thermal simulations to validate cooling capacity for high-density rack deployments
• Define and maintain liquid cooling distribution architecture, including cooling distribution units, manifolds, secondary loops, leak detection, and integration with chilled water or adiabatic dry-cooler plants
• Oversee the design, commissioning, lifecycle management, and maintenance of critical mechanical systems, including chillers, cooling towers, dry coolers, CRAC and CRAH units, air handling units, and humidification systems
• Support the design, review, and commissioning of critical electrical infrastructure, including UPS systems, PDUs, switchgear, generators, transfer switches, and distribution boards
• Act as Owner’s Engineer for MEP capital projects, managing contractor designs, RFIs, submittals, change orders, schedules, costs, risks, and equipment acceptance testing
• Maintain critical-facility documentation, including MOPs, SOPs, EOPs, engineering standards, design guides, and commissioning records, while supporting change management and risk assessments
• Monitor infrastructure performance and capacity, drive efficiency improvements, support audits and compliance requirements, and report key availability, capacity, PUE, and WUE metrics to senior leadership

What You Bring

• 5+ years of hands-on data center MEP engineering experience in enterprise, hyperscale, or colocation environments; experience in financial services or other mission-critical environments is a plus
• Demonstrated experience designing and commissioning at least one liquid cooling technology, including direct liquid cooling, cold-plate, rear-door heat exchanger, or immersion cooling solutions
• Strong mechanical engineering knowledge of chilled water, glycol, and refrigerant-based cooling systems, including pump sizing, pipe stress, flow analysis, cooling distribution units, secondary-loop hydraulics, and leak detection
• Working knowledge of critical electrical systems, including UPS topology, generator sizing, switchgear, PDUs, single-line diagrams, and integrated systems testing
• Experience delivering MEP capital projects from design through commissioning and operational handoff
• Familiarity with ASHRAE TC 9.9 guidelines, Uptime Institute Tier methodology, EN 50600, NFPA 70, IEC 60364, and applicable building and electrical safety requirements
• Proficiency with CAD or BIM tools such as AutoCAD or Revit MEP and thermal-modeling tools such as 6SigmaDC, Future Facilities, or comparable platforms
• Strong documentation, project coordination, communication, and problem-solving skills, with the ability to work independently across global sites and travel up to 30%

The estimated base salary range for this position is $175,000 to $250,000, which is specific to New York and may change in the future. Millennium pays a total compensation package which includes a base salary, discretionary performance bonus, and a comprehensive benefits package. When finalizing an offer, we take into consideration an individual’s experience level and the qualifications they bring to the role to formulate a competitive total compensation package.