Mechanical Engineer - Hydronics

About The Role

Armada is seeking a Senior Mechanical Systems / Design Engineer to lead the design and development of liquid cooling and mechanical distribution systems for our modular AI data center platforms. This role sits at the intersection of mechanical design, hydraulic engineering, thermal infrastructure, manufacturing, controls, and commissioning.

• Own the end-to-end mechanical cooling and fluid-distribution architecture for modular data center platforms.
• Define primary, secondary, and rack-level cooling boundaries.
• Establish pumping, flow-control, pressure-management, balancing, and redundancy strategies.
• Align heat-rejection equipment, distribution piping, CDUs, rack manifolds, rear-door heat exchangers, and other cooling interfaces.
• Develop scalable architectures that support multiple product configurations and deployment sizes.
• Perform and review pipe-sizing, flow, pressure-drop, pump-head, and system-volume calculations.
• Develop hydraulic models for water and glycol-based systems.
• Account for fluid concentration, viscosity, temperature, fittings, valves, strainers, heat exchangers, and equipment pressure losses.
• Define control-valve, balancing-valve, bypass, minimum-flow, and differential-pressure strategies.
• Validate system performance across normal, part-load, maintenance, startup, and failure conditions.
• Own P&IDs, mechanical schematics, equipment schedules, valve schedules, instrumentation schedules, and design calculations.
• Develop mechanical design criteria, basis-of-design requirements, and standard details.
• Define clear equipment and scope boundaries between plant systems, modules, CDUs, rack cooling, and field interconnections.
• Maintain disciplined revision control and technical traceability across the mechanical design package.
• Review vendor drawings, submittals, calculations, and equipment selections for compliance with system intent.
• Define mechanical interfaces between factory-built modules and field-installed infrastructure.
• Develop repeatable interconnect strategies for supply and return piping, manifolds, flexible connections, isolation valves, quick disconnects, drains, vents, and leak detection.
• Establish labeling, connection, access, and installation standards that reduce field variability.
• Support product configurations designed for transport, rapid installation, and phased expansion.
• Develop layouts that support repeatable fabrication, assembly, inspection, testing, and installation.
• Standardize piping routes, fittings, valve assemblies, supports, connection points, and mechanical components where practical.
• Carefully coordinate equipment clearances, removal paths, service access, drain points, vent points, and filter or strainer access.
• Partner with manufacturing teams to resolve buildability issues and improve future revisions.
• Translate field and factory feedback into product improvements.
• Define the mechanical measurement and control requirements for temperature, flow, differential pressure, pressure, leak detection, fluid level, pump status, and valve position.
• Partner with controls engineers to develop system operating sequences and alarm strategies.
• Support pump staging, variable-speed control, minimum-flow protection, equipment enablement, and failure-response logic.
• Help ensure mechanical system data is available for commissioning, operations, and remote monitoring.
• Design systems for safe and efficient filling, flushing, venting, draining, testing, balancing, and startup.
• Define isolation, bypass, temporary connection, and load-bank testing requirements.
• Develop or support factory acceptance, site acceptance, and integrated systems testing procedures.
• Establish performance-verification criteria for flow, pressure, temperature, heat rejection, controls, alarms, and failure modes.
• Work directly with commissioning and field teams during startup and troubleshooting.
• Partner with thermal, electrical, controls, structural, manufacturing, commissioning, supply chain, and product teams.
• Coordinate directly with OEMs, equipment manufacturers, fabricators, and engineering partners.
• Identify interface risks, design gaps, and single points of failure early.
• Make clear technical decisions while maintaining alignment across the broader product architecture.
• Communicate complex system behavior in a practical way to both technical and nontechnical stakeholders.