Mechanical Engineer - Hydronics

Overview

Armada is a full-stack edge infrastructure company delivering compute, connectivity, and sovereign AI/ML to remote locations. Armada is backed by notable investors and partnerships and aims to bridge the digital divide.

About the role

Mechanical Engineer - Hydronics (Distribution Focus) to own the mechanical distribution architecture for the modular liquid-cooled data center platform. This role covers piping, valves, instrumentation, module interconnects, and serviceability across the primary water loop and secondary PG25 loop. This is a hands-on architecture and execution role focused on building a system that is repeatable, commissionable, maintainable, and scalable across deployments. The right candidate will move a design from concept into manufacturing, field installation, startup, and long-term operation.

You will work with internal engineering teams, OEMs, fabricators, controls, manufacturing, and commissioning leads to ensure the mechanical distribution layer is robust, standardized, and ready for deployment.

Location
. This role is office-based at our Bellevue, Washington office.

What Youinish Youill-do
Key Responsibilities

• Hydronic Architecture Ownership:
  Own the hydronic distribution architecture across primary water/PG25 loop and secondary water/PG25 loop; define and standardize rules for flow, pressure drop, balancing, and measurement; establish practical design approaches for PG25 and water-based systems including pipe sizing, fluid behavior, and maintainability; align plant, distribution, and rack cooling interfaces.
• Distribution Design and Interface Control:
  Own distribution P&IDs, valve schedules, instrumentation schedules; maintain revision discipline, tagging standards, and interface clarity across the mechanical distribution package; define boundaries and interfaces between plant equipment, CDUs, rack components, and module-to-module interconnects; develop and maintain interface control documentation for hydronic system boundaries.
• Commissioning-First Design:
  Design for startup, commissioning, and long-term operation; define fill, flush, vent, drain, isolation, bypass, and strainer strategies; establish measurement points for flow, differential pressure, and temperature; partner with commissioning and controls teams to define what must be measured and what startup performance looks like.
• Pipe Sizing and Pressure Drop Management:
  Own pipe sizing methodology and pressure drop strategy for PG25 and water loops; define practical balancing and instrumentation placement; ensure real-world field performance aligns with design intent; establish repeatable standards across product variants.
• Layout, Serviceability, and Buildability:
  Own mechanical distribution layout packages and service clearance requirements; ensure safe access, maintenance, replacement, and long-term serviceability; support design for manufacturing by standardizing routing approaches, fittings strategy, tolerances, and assembly expectations; define clear factory-built versus field-installed scope boundaries.
• Modular Interconnect Strategy:
  Define standard module interconnect approaches, including manifolds, quick connects, labeling, boundary isolation, and leak detection interfaces as applicable; ensure interconnect designs support rapid deployment while preserving reliability and maintainability; drive consistency across builds to reduce site variability and improve product repeatability.
• Cross-Functional Integration:
  Partner with mechanical plant, thermal, electrical, controls, manufacturing, and commissioning teams; coordinate system interfaces while maintaining baseline discipline; work with OEMs and fabricators and own the internal distribution architecture and standards; support factory builds, field feedback, and lessons learned for future revisions.

Required Qualifications

• 7+ years of experience in hydronic distribution design for data centers, industrial systems, mission-critical HVAC, or equivalent thermal infrastructure
• Strong experience owning P&IDs, valve strategies, and instrumentation design
• Practical field knowledge of commissioning, startup, and serviceability constraints
• Experience with glycol-based…