About Submer Submer designs and delivers end-to-end AI datacenter infrastructure built around industry-leading liquid cooling. We help organizations scale AI beyond the limits of traditional datacenters by enabling higher density, greater efficiency and lower environmental impact – accelerating time-to-AI from first deployment to full production. What impact you will have We are seeking a Senior MEP Design Engineer - HPC/AI Data Centers to lead the full Mechanical, Electrical, and Plumbing (MEP) design and delivery of high-performance computing (HPC) and AI data centers.

This senior role owns the integrated MEP architecture for large-scale ( 100-300 MW ) facilities and modular data center (MDC) deployments that scale into 50-300 MW HPC/AI sites. You will ensure seamless coordination across mechanical, electrical, and plumbing systems to support next-generation GPU clusters, with a strong emphasis on NVIDIA Grace Blackwell (GB300) and Vera Rubin (VR200) reference architectures. This is a hands-on technical leadership position ideal for an engineer who can own end-to-end MEP design for mission-critical, high-density environments.

What You’Ll Do

Lead the holistic MEP design, specification, and optimization for hyperscale and modular HPC/AI data centers, ensuring integrated performance, reliability, efficiency, and scalability. Design electrical systems including MV/LV distribution, switchboards, overhead busways, circuit breakers, transformers (ML/VL), PDUs, grounding, protection, BESS, UPS, and generators. Oversee mechanical systems focused on high-density liquid cooling (direct-to-chip, immersion, CDUs, in-row/in-rack solutions), CRAC/CRAH, heat rejection, airflow management, and redundancy for 100+ kW racks.

Manage plumbing and fluid systems, including coolant distribution, primary/secondary cooling loops, leak detection, piping, pumps, filtration, and integration with facility water systems or closed-loop designs. Architect modular data center solutions (1-2 MW containers/pods) that efficiently aggregate into larger 50-300 MW HPC/AI sites, emphasizing standardization, rapid deployment, and future-proofing.

Requirements

Perform system-level studies (power, thermal, hydraulic, CFD) and ensure compliance with NEC, NFPA, ASHRAE, IEEE, Uptime Institute, and local codes. Collaborate with architecture, structural, IT, and construction teams throughout design, procurement, construction, commissioning, and handover phases. Optimize for energy efficiency, sustainability, capacity planning, fault tolerance, and total cost of ownership in AI factory environments.

Develop standards, create and review drawings/specifications, troubleshoot issues, and mentor junior MEP engineers. Create internal and customer-facing MEP specifications and explain/discuss with technical and non-technical customers. What you’ll need Bachelor’s degree (Master’s preferred) in Mechanical Engineering, Electrical Engineering, or a related MEP-focused discipline.

PE license strongly preferred. 10+ years of progressive experience in MEP engineering for mission-critical facilities, with at least 5-7 years in large-scale data centers or equivalent high-density environments. Demonstrated ability to design complete HPC/AI data centers across all three MEP disciplines (Mechanical, Electrical, Plumbing/Cooling).

Proven track record with HPC/AI data centers at 100-300 MW scale and modular deployments (1-2 MW units scaling to 50-300 MW sites).

. Expertise in high-density liquid cooling, Grid-to-Rack power distribution, all MEP equipment in single-line power specification, 13.8kV/34.5