Senior Mechanical/Process Engineer (PE)

About AGI

Advanced Giga Inc. designs, fabricates, and deploys modular data center infrastructure for hyperscale operators. Our flagship products—the MDH (Modular Data Hall), MTCS (Modular Technology Cooling System), and MES (Modular Energy Server)—are factory-built, tested, and commissioned before they ever leave our facility. We are not a general contractor. We are an engineering-led manufacturer that owns the full lifecycle: design, fabrication, controls integration, factory acceptance testing, delivery, and on-site commissioning. Our clients include the largest cloud infrastructure providers in the world.

We are a small, high-impact team where your decisions directly shape outcomes on programs worth tens of millions of dollars. If you have spent your career inside large organizations and are looking for a place where your experience actually gets used—not diluted across layers of bureaucracy—this is it.

The Role

AGI is hiring a Senior Mechanical/Process Engineer to own the thermal and fluid systems that are the core of our products. Everything we build exists to move heat—from IT equipment into air, from air into water, from water into the atmosphere—and you will be the engineering authority on how those systems are designed, sized, specified, and documented.

You will own your systems top to bottom. That means developing the process flow diagrams, producing P&IDs, performing hydraulic calculations, selecting equipment, writing RFQs, reviewing vendor submittals, making purchasing recommendations, and then reviewing the 3D model to ensure what got designed matches what got drawn. You are not handing off to someone else at any stage—you carry it from concept through commissioning.

Your PE stamp matters here. Our modules ship to multiple states, and you need an NCEES record that allows you to obtain licensure wherever projects require. You will stamp mechanical drawings, review third-party engineering, and serve as AGI’s responsible engineer of record on the mechanical and process discipline.

What You Will Actually Do

• Design thermal management and fluid distribution systems—technology cooling water loops, chilled water systems, condenser water circuits, glycol systems, and heat rejection equipment
• Develop block flow diagrams, process flow diagrams (PFDs), and piping and instrumentation diagrams (P&IDs) from scratch
• Develop Sequences of Operations (SOOs) that define normal operating modes, startup/shutdown procedures, failure response logic, and transition states
• Produce Cause and Effect diagrams that map process inputs to control actions, alarms, and safety interlocks
• Lead or participate in PMFEA (Process Mode and Failure Effects Analysis) and HAZOP studies
• Perform heat transfer calculations—heat exchanger sizing and selection, approach temperatures, effectiveness-NTU, LMTD, fouling factors, and system-level energy balance
• Perform hydraulic calculations—pump sizing, pipe sizing, system curve development, NPSH analysis, pressure drop, and CV sizing for control valves
• Specify and select major mechanical equipment—heat exchangers, cooling towers, adiabatic coolers, dry coolers, chillers, pumps, expansion tanks, air separators, chemical treatment systems
• Prepare RFQ packages for mechanical equipment—technical specifications, bid evaluation criteria, and commercial comparison matrices
• Review 3D Revit/Navisworks models against P&IDs to verify design intent is accurately captured
• Provide clear direction to designers for 3D model execution—marked-up P&IDs, routing sketches, equipment arrangement preferences, design criteria
• Design compressed gas systems—nitrogen, instrument air, and specialty gas distribution
• Coordinate with controls engineering on process control strategies—control valve sizing, instrument selection, setpoint definition, alarm philosophy, PLC/BMS interface
• Produce stamped mechanical engineering documents—calculations, specifications, data sheets, and drawing packages
• Support factory acceptance testing (FAT) and on-site commissioning

Who You Are

• Licensed Professional Engineer (PE) in Mechanical Engineering with an active NCEES record allowing comity licensure in additional states
• 10+ years of mechanical/process engineering experience with substantial focus on heat transfer systems and thermal management for high-density critical environments
• Deep understanding of data center cooling architectures—air-side economization, chilled water plants, direct liquid cooling, rear door heat exchangers (RDHX), fan coil units, CRAHs/CRACs, in-row cooling, and hybrid air/liquid systems
• Direct experience with heat rejection equipment—cooling towers (open and closed circuit), adiabatic coolers, dry coolers, air-cooled chillers, water-cooled chiller plants including free cooling economizer modes
• Experience with coolant distribution units (CDUs) and direct-to-chip liquid cooling systems
• Ability to produce P&IDs, PFDs, and block flow diagrams from scratch in Bluebeam, AutoCAD, or Revit—you are the originator of these documents, not just a reviewer
• Strong hydraulic engineering skills—pump selection with system curve analysis, pipe sizing, pressure drop, NPSH verification, control valve CV sizing
• Experience writing RFQ packages, evaluating vendor proposals, reviewing submittals against specifications
• Ability to review 3D BIM models and understand the relationship between model geometry and P&ID logic
• Experience directing designers/drafters—providing clear basis of design and marked-up sketches
• Self-directed engineering workflow

Preferred (Not Required)

• Experience with compressors, expanders, companders, and turboexpanders
• Experience with modular or prefabricated mechanical systems
• Background in data center mechanical design for hyperscale operators (AWS, Google, Microsoft, Meta)
• Experience with computational fluid dynamics (CFD) for airflow modeling in contained data center environments
• Familiarity with pipe stress analysis concepts (thermal expansion, anchor loads, flexibility requirements)
• Experience with water treatment chemistry for closed-loop cooling systems
• Knowledge of UL/ETL certification processes as they relate to mechanical assemblies and piping systems
• Experience with commissioning and startup of large cooling systems (system flush/passivation per ASTM A967, chemical cleaning, nitrogen purge, performance testing)
• Familiarity with Revit MEP for mechanical systems

What We Offer

• Base salary: $160,000 - $200,000
• Ownership of your domain—you are the mechanical/process engineering authority, your stamp is on the drawings, and your system designs define what gets built
• Performance bonus tied to program delivery milestones
• Direct impact on a high-growth company at the intersection of manufacturing and critical infrastructure
• A technical leadership team that speaks your language (engineering-led company, not sales-led)
• The chance to build something from a formative stage—this is not a mature 500-person organization with established playbooks. We are building those playbooks, and the right person will help write them

To Apply

Send your resume, PE license details, and a brief description of the most complex thermal/fluid system you have designed to info@advancedgiga.ai.