Mechanical Engineer - Hydronics

About the CompanyArmada is a full-stack edge infrastructure company delivering compute, connectivity, and sovereign AI/ML to some of the world’s most remote places. Named one of Fast Company's Most Innovative Companies, Armada’s solutions are deployed in over 60 countries globally for organizations ranging from energy to defense. With over $200 million in funding, Armada is backed by top investors such as Microsoft (M12), Founders Fund, and has strategic partnerships including Starlink, Skydio, and NVIDIA. We are looking for the most brilliant minds in the world to join us. Working at Armada means taking ownership, driving autonomy, and delivering impact. You’ll tackle challenges that haven’t been solved before and help build something transformative from the ground up. What you do here will not only define your career but help further Armada’s mission to bridge the digital divide for customers around the world. About the roleWe are looking for a Mechanical Engineer - Hydronics (Distribution Focus) to own the mechanical distribution architecture for our modular liquid-cooled data center platform. This role is responsible for the piping, valves, instrumentation, module interconnects, and serviceability strategy across both 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 multiple deployments. The right candidate will bring deep hydronic distribution expertise and a practical understanding of what it takes to move a design from concept into manufacturing, field installation, startup, and long-term operation.You will work closely with internal engineering teams, OEMs, fabricators, controls, manufacturing, and commissioning leads to ensure the mechanical distribution layer is robust, standardized, and ready for real-world deployment.Location. This role is remote.What You'll Do (Key Responsibilities)Hydronic Architecture OwnershipOwn the hydronic distribution architecture across:Primary water/PG25 loopSecondary water/PG25 loopDefine and standardize system design rules for flow, pressure drop, balancing, and measurementEstablish practical design approaches for PG25 and water-based systems, including pipe sizing, fluid behavior, and maintainability considerationsSupport system-level alignment between plant, distribution, and rack cooling interfacesDistribution Design and Interface ControlOwn distribution P&IDs, valve schedules, and instrumentation schedulesMaintain revision discipline, tagging standards, and interface clarity across the mechanical distribution packageDefine boundaries and interfaces between plant equipment, CDUs, rack cooling components, and module-to-module interconnectsDevelop and maintain interface control documentation for hydronic system boundariesCommissioning-First DesignDesign for startup, commissioning, and long-term operationDefine fill, flush, vent, drain, isolation, bypass, and strainer strategiesEstablish measurement points for flow, differential pressure, and temperaturePartner with commissioning and controls teams to define what must be measured, how it will be measured, and what acceptable startup performance looks likePipe Sizing and Pressure Drop ManagementOwn pipe sizing methodology and pressure drop strategy for both PG25 and water loopsDefine practical approaches to balancing and instrumentation placementEnsure real-world field performance aligns with design intentHelp establish repeatable standards for distribution performance across product variantsLayout, Serviceability, and BuildabilityOwn mechanical distribution layout packages and service clearance requirementsEnsure systems are designed for safe access, maintenance, replacement, and long-term serviceabilitySupport design for manufacturing by standardizing routing approaches, fittings strategy, tolerances, and assembly expectationsHelp define clear factory-built versus field-installed scope boundariesModular Interconnect StrategyDefine standard module interconnect approaches, including manifolds, quick connects, labeling, boundary isolation, and leak detection interfaces as applicableEnsure interconnect designs support rapid deployment while preserving reliability and maintainabilityDrive consistency across builds to reduce site variability and improve product repeatabilityCross-Functional IntegrationPartner with mechanical plant, thermal, electrical, controls, manufacturing, and commissioning teamsCoordinate system interfaces without losing baseline disciplineWork with OEMs and fabricators while maintaining ownership of the internal distribution architecture and standardsSupport factory builds, field feedback collection, and lessons-learned incorporation into future revisionsRequired Qualifications7+ years of experience in hydronic distribution design for data centers, industrial systems, mission-critical HVAC, or comparable thermal infrastructureStrong experience owning P&I