Senior Mechanical Design Engineer – Liquid Cooling Systems

<div class="content-intro"><p><strong>About the Company</strong></p>
<div class="x_x_Paragraph x_x_SCXW198602660 x_x_BCX0">
<p><span data-contrast="none">Armada is the hyperscaler for the edge, delivering modular AI infrastructure from first deployment to AI factory with speed, scale and sovereignty. Named one of Fast Company's Most Innovative Companies and to the CNBC Disruptor 50, Armada’s solutions are deployed in over 60 countries globally for organizations ranging from energy to defense. </span></p>
<p>With nearly $500 million in funding to date, Armada is backed by leading investors including Founders Fund, Lux, BlackRock and Microsoft (M12), alongside strategic partnerships with Microsoft, Dell, Palantir, NVIDIA, SpaceX, and Skydio. We are building the infrastructure layer for sovereign and edge AI - rugged, deployable compute for customers that cannot rely on centralized cloud.</p>
<p><span data-contrast="none">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.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335557856":16777215,"335559738":0,"335559739":0}"> </span></p>
</div>
<p> </p></div><p><strong>About the role</strong></p>
<p><span data-contrast="auto">Armada is seeking a </span><strong><span data-contrast="auto">Senior Mechanical Systems / Design Engineer</span></strong><span data-contrast="auto"> to lead the design and development of liquid cooling and mechanical distribution systems for our modular AI data center platforms.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":240,"335559739":240}"> </span><span data-contrast="auto">This role sits at the intersection of mechanical design, hydraulic engineering, thermal infrastructure, manufacturing, controls, and commissioning.</span> <span data-contrast="auto">You will own the mechanical distribution architecture connecting heat-rejection equipment, pumps, piping, manifolds, coolant distribution units, rack cooling systems, and modular interconnects. You will translate system requirements into practical, serviceable, and repeatable designs that can be manufactured in a factory and deployed consistently across multiple sites.</span> <span data-contrast="auto">This is not a traditional consulting or drawing-review role. You will help establish the design rules, technical standards, interfaces, and commissioning philosophy behind the product itself.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":240,"335559739":240}"> </span></p>
<h3> </h3>
<p> </p>
<p><strong><span data-contrast="none"><span data-ccp-parastyle="heading 2">Location.</span></span></strong><span data-contrast="none"><span data-ccp-parastyle="heading 2"> T</span><span data-ccp-parastyle="heading 2">his role is remote.</span></span></p>
<h3> </h3>
<p><strong><span data-contrast="none"><span data-ccp-parastyle="heading 2"><br>What You'll Do (Key Responsibilities)<br></span></span></strong></p>
<p><strong><span data-contrast="none"><span data-ccp-parastyle="heading 3">Mechanical and Liquid Cooling Architecture</span></span></strong><span data-ccp-props="{"134233117":false,"134233118":false,"134245418":true,"134245529":true,"335559738":281,"335559739":281}"> </span></p>
<ul>
<li><span data-contrast="auto">Own the end-to-end mechanical cooling and fluid-distribution architecture for modular data center platforms.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Define primary, secondary, and rack-level cooling boundaries.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Establish pumping, flow-control, pressure-management, balancing, and redundancy strategies.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Align heat-rejection equipment, distribution piping, CDUs, rack manifolds, rear-door heat exchangers, and other cooling interfaces.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Develop scalable architectures that support multiple product configurations and deployment sizes.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> <br><br></span></li>
</ul>
<p><strong><span data-contrast="none"><span data-ccp-parastyle="heading 3">Hydraulic System Design</span></span></strong><span data-ccp-props="{"134233117":false,"134233118":false,"134245418":true,"134245529":true,"335559738":281,"335559739":281}"> </span></p>
<ul>
<li><span data-contrast="auto">Perform and review pipe-sizing, flow, pressure-drop, pump-head, and system-volume calculations.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Develop hydraulic models for water and glycol-based systems.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Account for fluid concentration, viscosity, temperature, fittings, valves, strainers, heat exchangers, and equipment pressure losses.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Define control-valve, balancing-valve, bypass, minimum-flow, and differential-pressure strategies.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Validate system performance across normal, part-load, maintenance, startup, and failure conditions.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> <br><br></span></li>
</ul>
<p><strong><span data-contrast="none"><span data-ccp-parastyle="heading 3">Mechanical Design and Documentation</span></span></strong><span data-ccp-props="{"134233117":false,"134233118":false,"134245418":true,"134245529":true,"335559738":281,"335559739":281}"> </span></p>
<ul>
<li><span data-contrast="auto">Own P&IDs, mechanical schematics, equipment schedules, valve schedules, instrumentation schedules, and design calculations.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Develop mechanical design criteria, basis-of-design requirements, and standard details.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Define clear equipment and scope boundaries between plant systems, modules, CDUs, rack cooling, and field interconnections.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Maintain disciplined revision control and technical traceability across the mechanical design package.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Review vendor drawings, submittals, calculations, and equipment selections for compliance with system intent.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
</ul>
<p><strong><span data-contrast="none"><span data-ccp-parastyle="heading 3"><br>Modular Product Integration</span></span></strong><span data-ccp-props="{"134233117":false,"134233118":false,"134245418":true,"134245529":true,"335559738":281,"335559739":281}"> </span></p>
<ul>
<li><span data-contrast="auto">Define mechanical interfaces between factory-built modules and field-installed infrastructure.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Develop repeatable interconnect strategies for supply and return piping, manifolds, flexible connections, isolation valves, quick disconnects, drains, vents, and leak detection.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Establish labeling, connection, access, and installation standards that reduce field variability.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Support product configurations designed for transport, rapid installation, and phased expansion.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> <br><br></span></li>
</ul>
<p><strong><span data-contrast="none"><span data-ccp-parastyle="heading 3">Design for Manufacturing and Serviceability</span></span></strong><span data-ccp-props="{"134233117":false,"134233118":false,"134245418":true,"134245529":true,"335559738":281,"335559739":281}"> </span></p>
<ul>
<li><span data-contrast="auto">Develop layouts that support repeatable fabrication, assembly, inspection, testing, and installation.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Standardize piping routes, fittings, valve assemblies, supports, connection points, and mechanical components where practical.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Coordinate equipment clearances, removal paths, service access, drain points, vent points, and filter or strainer access.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Partner with manufacturing teams to resolve buildability issues and improve future revisions.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Translate field and factory feedback into product improvements.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> <br><br></span></li>
</ul>
<p><strong><span data-contrast="none"><span data-ccp-parastyle="heading 3">Controls and Instrumentation Integration</span></span></strong><span data-ccp-props="{"134233117":false,"134233118":false,"134245418":true,"134245529":true,"335559738":281,"335559739":281}"> </span></p>
<ul>
<li><span data-contrast="auto">Define the mechanical measurement and control requirements for temperature, flow, differential pressure, pressure, leak detection, fluid level, pump status, and valve position.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Partner with controls engineers to develop system operating sequences and alarm strategies.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Support pump staging, variable-speed control, minimum-flow protection, equipment enablement, and failure-response logic.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Help ensure mechanical system data is available for commissioning, operations, and remote monitoring.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> <br><br></span></li>
</ul>
<p><strong><span data-contrast="none"><span data-ccp-parastyle="heading 3">Commissioning-First Design</span></span></strong><span data-ccp-props="{"134233117":false,"134233118":false,"134245418":true,"134245529":true,"335559738":281,"335559739":281}"> </span></p>
<ul>
<li><span data-contrast="auto">Design systems for safe and efficient filling, flushing, venting, draining, testing, balancing, and startup.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Define isolation, bypass, temporary connection, and load-bank testing requirements.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Develop or support factory acceptance, site acceptance, and integrated systems testing procedures.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Establish performance-verification criteria for flow, pressure, temperature, heat rejection, controls, alarms, and failure modes.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Work directly with commissioning and field teams during startup and troubleshooting.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> <br><br></span></li>
</ul>
<p><strong><span data-contrast="none"><span data-ccp-parastyle="heading 3">Cross-Functional Engineering Leadership</span></span></strong><span data-ccp-props="{"134233117":false,"134233118":false,"134245418":true,"134245529":true,"335559738":281,"335559739":281}"> </span></p>
<ul>
<li><span data-contrast="auto">Partner with thermal, electrical, controls, structural, manufacturing, commissioning, supply chain, and product teams.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Coordinate directly with OEMs, equipment manufacturers, fabricators, and engineering partners.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Identify interface risks, design gaps, and single points of failure early.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Make clear technical decisions while maintaining alignment across the broader product architecture.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Communicate complex system behavior in a practical way to both technical and nontechnical stakeholders.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> <br><br></span></li>
</ul>
<p><span data-ccp-props="{"134233117":false,"134233118":false,"134245418":true,"134245529":true,"335559738":299,"335559739":299}"><strong>Required Qualifications</strong> </span></p>
<ul>
<li><span data-contrast="auto">7 or more years of experience designing mechanical cooling, hydraulic distribution, process cooling, or mission-critical infrastructure systems.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Experience with data centers, semiconductor facilities, industrial process cooling, central utility plants, or comparable high-reliability environments.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Strong knowledge of pipe sizing, pump selection, pressure-drop analysis, flow balancing, system volume, and hydraulic control.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Experience developing and owning P&IDs, mechanical calculations, equipment schedules, valve schedules, and instrumentation requirements.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Practical knowledge of chilled-water, condenser-water, glycol, or process-fluid systems.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Experience designing for commissioning, maintenance, isolation, flushing, venting, draining, and service access.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Ability to coordinate across engineering, manufacturing, controls, commissioning, and field teams.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Strong technical judgment and the ability to own work with limited oversight.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> <br><br></span></li>
</ul>
<h3> </h3>
<p><strong>Preferred Experience and Skills</strong></p>
<ul>
<li><span data-contrast="auto">Experience with direct liquid cooling for AI or HPC systems.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Experience with CDUs, rack manifolds, cold plates, rear-door heat exchangers, liquid-to-liquid heat exchangers, or liquid-to-air systems.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Background in modular, prefabricated, skid-based, or containerized infrastructure.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Experience with AFT Fathom, Pipe-Flo, or comparable hydraulic modeling tools.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Familiarity with CFD, thermal modeling, or transient analysis.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Proficiency with AutoCAD, Revit, Plant 3D, SolidWorks, Inventor, or similar design tools.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Experience supporting FAT, SAT, IST, or field commissioning.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li><span data-contrast="auto">Professional Engineer license or equivalent technical depth.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
</ul>
<p> </p>
<p> </p>
<h3> </h3>
<p><strong>Compensation</strong></p>
<p><u>For U.S. Based candidates:</u> To ensure fairness and transparency, the starting base salary range for this role for candidates in the U.S. are listed below, varying based on location experience, skills, and qualifications.</p>
<p>In addition to base salary, <em><strong>this role will also be offered equity and subsidized benefits</strong> </em>(details available upon request).</p>
<p><span data-contrast="auto">We use a geographic pay structure based on cost-of-labor markets.</span> <span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></p>
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="1" data-aria-level="1"><strong><span data-contrast="auto">Tier 1 (e.g., SF Bay Area, NYC, Seattle):</span></strong><span data-contrast="auto"> $157,600 – $185,000</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="2" data-aria-level="1"><strong><span data-contrast="auto">Tier 2 (most U.S. metro areas):</span></strong><span data-contrast="auto"> $137,040  – $171,300</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></li>
<li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="2" data-aria-level="1"><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"><strong>Tier 3 (other cities): </strong>$130,188 <span data-contrast="auto">–</span> $162,735</span></li>
</ul>
<p><span data-contrast="auto">Final compensation will be determined by experience, scope, and level, and may vary from the posted range.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335559738":0,"335559739":0}"> </span></p>
<h3 class="p1"> </h3>
<p> </p>
<p><strong>Benefits</strong></p>
<ul class="ul1">
<li class="li1">Competitive base salary and equity</li>
<li class="li1">Medical, dental, and vision (subsidized cost)</li>
<li class="li1">Health savings accounts (HSA), flexible spending accounts (FSA), and dependent care FSAs (DCFSA)</li>
<li class="li1">Retirement plan options, including 401(k) and Roth 401(k)</li>
<li class="li1">Unlimited paid time off (PTO)</li>
<li class="li1">14 paid company holidays per year</li>
</ul>
<p><span style="color: rgb(236, 240, 241);">#LI-AB1</span></p>
<p><span style="color: rgb(0, 0, 0);"><span style="color: rgb(236, 240, 241);"><span data-teams="true">#LI-Remote</span></span></span></p>
<p> </p><div class="content-pay-transparency"><div class="pay-input"><div class="title">Compensation</div><div class="pay-range"><span>$137,040</span><span class="divider">—</span><span>$171,300 USD</span></div></div></div><div class="content-conclusion"><p><strong>You're a Great Fit if You're</strong></p>
<ul data-pattern="discCircleSquare" data-depth="1">
<li value="1">A go-getter with a growth mindset. You're intellectually curious, have strong business acumen, and actively seek opportunities to build relevant skills and knowledge </li>
<li value="2">A detail-oriented problem-solver. You can independently gather information, solve problems efficiently, and deliver results with a "get-it-done" attitude </li>
<li value="3">Thrive in a fast-paced environment. You're energized by an entrepreneurial spirit, capable of working quickly, and excited to contribute to a growing company</li>
<li value="4">A collaborative team player. You focus on business success and are motivated by team accomplishment vs personal agenda </li>
<li value="5">Highly organized and results-driven. Strong prioritization skills and a dedicated work ethic are essential for you </li>
</ul>
<p> </p>
<p><strong>Equal Opportunity Statement</strong></p>
<p>At Armada, we are committed to fostering a work environment where everyone is given equal opportunities to thrive. As an equal opportunity employer, we strictly prohibit discrimination or harassment based on race, color, gender, religion, sexual orientation, national origin, disability, genetic information, pregnancy, or any other characteristic protected by law. This policy applies to all employment decisions, including hiring, promotions, and compensation. Our hiring is guided by qualifications, merit, and the business needs at the time.</p>
<p> </p>
<p><strong>Unsolicited Resumes and Candidates</strong></p>
<p><span data-teams="true">Armada does not accept unsolicited resumes or candidate submissions from external agencies or recruiters. All candidates must apply directly through our careers page. Any resumes submitted by agencies without a prior signed agreement will be considered unsolicited and Armada will not be obligated to pay any fees.</span></p>
<p> </p></div>