Senior Mechanical/Process Engineer (PE)

Advanced Giga Inc. designs, fabricates, and deploys modular data center infrastructure for hyperscale operators. They are seeking a Senior Mechanical/Process Engineer to own the thermal and fluid systems critical to their products, overseeing the design and implementation from concept through commissioning.

Responsibilities:

• 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

Requirements:

• 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
• 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