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Lambda, a leader in AI cloud infrastructure, is seeking a Senior Mechanical Delivery Engineer to own the mechanical engineering lifecycle from construction completion through commissioning and initial compute loading at data center sites. This role is critical to ensuring Lambda's cooling infrastructure—serving tens of thousands of customers from AI researchers to hyperscalers—operates safely and reliably under high-density GPU loads.
You will serve as Lambda's field engineering owner, performing comprehensive site walkdowns to verify mechanical systems against approved designs, P&IDs, specifications, and Lambda standards. Your responsibilities include validating equipment installation (chillers, cooling towers, dry coolers, pumps, heat exchangers, CRAHs, CDUs, liquid-cooling loops, and water systems), confirming redundancy and failure isolation, and inspecting pressure testing, flushing, cleaning, filtration, water treatment, and equipment startup results.
You will identify installation deficiencies and design conflicts, document punch-list items, and drive them to closure. You'll witness factory and site acceptance testing, develop and review startup plans, MOPs, SOPs, and commissioning scripts, and troubleshoot flow, pressure, temperature, air-removal, fouling, and controls issues during system bring-up. Before GPU infrastructure is placed under load, you'll confirm cooling capacity, water quality, control stability, and monitoring readiness.
Coordination is essential: you'll work with design engineers, general contractors, mechanical trades, equipment manufacturers, commissioning agents, operations, and HPC deployment teams. You'll validate as-built documentation and turnover packages before operational handoff, capture field lessons to improve Lambda's design standards and playbooks, and mentor other engineers during high-risk startup activities.
This role requires extensive travel and extended periods at active construction and commissioning sites.
REQUIREMENTS:
- Significant experience delivering, commissioning, or operating mechanical systems in data centers, mission-critical facilities, central plants, or industrial environments
- Strong understanding of hydronic systems, heat transfer, pumping, heat exchangers, heat rejection, air cooling, and liquid cooling
- Ability to interpret P&IDs, equipment submittals, mechanical layouts, control sequences, test reports, and construction documentation
- Hands-on experience with site inspections, pressure testing, flushing, water treatment, testing and balancing, equipment startup, or commissioning
- Understanding of mechanical redundancy, failure isolation, thermal ride-through, maintainability, and operational risk
- Ability to determine whether installed systems are ready to safely support high-density compute loads
- Knowledge of construction safety, lockout/tagout, stored-energy hazards, and safe startup practices
- Sound technical decision-making in the field, ability to escalate critical issues, and coordinate corrective work under schedule pressure
- Clear communication with construction teams, engineers, vendors, operators, and senior stakeholders
- Willingness to travel extensively and spend extended periods at active construction and commissioning sites
- Bachelor's degree in mechanical engineering or equivalent practical experience
NICE TO HAVE:
- Experience commissioning hyperscale, colocation, HPC, or AI data centers
- Experience with direct-to-chip liquid cooling, CDUs, technology cooling-water loops, or multi-megawatt GPU deployments
- Knowledge of coolant chemistry, glycol systems, filtration, flushing, passivation, corrosion control, and materials compatibility
- Familiarity with Level 1–5 commissioning and integrated systems testing
- Experience with Procore, Bluebeam, commissioning-management platforms, or building-automation trend data
- Experience investigating cooling failures and leading root-cause analysis
- Professional Engineer licensure, commissioning certification, or testing-and-balancing certification
