Fluidstack
Data Center Operations
PrincipalOperationsEngineer,Mechanical—DataCenterOperations
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“Principal Operations Engineer, Mechanical — Data Center Operations at Fluidstack. Skills: Mechanical infrastructure operation, Cooling systems expertise, Operational readiness, Technical leadership. Serve as principal operational technical authority for mechanical infrastructure. Lead technical and operational site audits”
What You'll Achieve.
Ensure systems that keep compute cold are operated, maintained, and continuously improved; Drive team technical readiness ahead of site activation; Ensure operability, maintainability, and reliability concerns are surfaced and addressed before they are built in; Reinforce patterns that work and drive out patterns that have not held up in operations; Ensure learnings propagate across all sites; Provide an operational perspective on workmanship, installation quality, and pre-energization readiness
Industry & Context.
Lead root cause analysis for significant thermal or mechanical drive corrective actions
Willingness to travel extensively across the fleet. 50-75%
What They're Looking For.
Must Have
10+ years of hands-on experience in mission-critical mechanical and cooling systems, at least 5 years as the senior technical voice on a site, campus, or fleet, Data center operations experience, Deep working command of chilled water plants, condenser water systems, CDUs and liquid cooling, air handling, refrigeration cycles, and pumping and piping systems, Practical command of psychrometric charts, refrigeration cycles, and ASHRAE thermal guidelines for data center environments, Demonstrated ability to author, approve, and execute high-risk MOPs and EOPs in live critical environments, A track record of leading root cause analysis on significant thermal or mechanical events and driving corrective actions to closure, A track record of holding OEMs, service vendors, and contractors accountable, written communication: operational health assessments, RCAs, procedure reviews, and design review feedback are second nature, Comfort operating as the senior technical voice across operations, design, construction, hardware, and EHS, Willingness to travel extensively across the fleet. 50-75%
Nice to Have
Bachelor's degree in Mechanical Engineering or related field, Direct experience with direct-to-chip or immersion liquid cooling at production scale, Hyperscale or large colocation operational experience at hundreds of MW+ scale, EPA 608 Universal certification, Trade certification or state license in PE licensure, Uptime Institute AOS or equivalent operations credential, Tier III/Tier IV commissioning leadership experience, Experience operating across multiple sites or as part of a global fleet operations function, Experience standing up new sites from commissioning handover through steady-state, Experience contributing operational requirements into reference designs or productized data center builds
What You'll Do.
Serve as principal operational technical authority for mechanical infrastructure
Lead technical and operational site audits
Own mechanical operational readiness for new sites
Review operational designs for new builds
Feed structured operational learnings back into design
Author and approve high-risk MOPs
Lead root cause analysis for mechanical events
Contribute to and uphold mechanical safety program
Partner with QA/QC during construction
Build and deliver technical training
Mentor Field Engineers and rising operational talent
How You'll Work.
Team & Collaboration
Serve as the technical arm of senior operations leadership; Represent the operational point of view in design forums; Partner with QA/QC during construction; Mentor Field Engineers and rising operational talent; Act as the senior technical voice in operational reviews, incident reviews, and design reviews; Comfort operating as the senior technical voice across operations, design, construction, hardware, and EHS
Communication Scope
written communication: operational health assessments, RCAs, procedure reviews, and design review feedback are second nature
Process & Methodology
Own the remediation roadmap through closure with site leadership
Full Job Description
ABOUT FLUIDSTACK We exist to make humanity more free. For most of human history, you farmed or you starved. Technology gave people more time for the things they wanted to do, instead of things they had to do. Powerful AI will be the biggest lever for human choice we've ever built - but only if models are aligned with what humanity actually wants. There are groups building AI who don't share these goals. Whoever deploys frontier compute infrastructure fastest will decide whether AI expands human freedom or shrinks it. We're singularly focused on delivering 10 to 100s of GWs of compute faster than anyone else, rethinking every layer of the stack. We acquire power, design and build data centers, and operate them - with teams spanning hardware and software. Speed and scale are our key differentiators. Come be a part of building civilization-scale infrastructure for AI. We hire people who care deeply about this problem space. If that is you, please apply! ABOUT THE ROLE We are seeking a Principal Operations Engineer, Mechanical to serve as the most senior technical authority for the operational mechanical and cooling infrastructure across our hyperscale AI data center portfolio. AI workloads create thermal conditions that punish anything less than precision execution — this role exists to make sure the systems that keep our compute cold are operated, maintained, and continuously improved at the standard the workload demands. You will operate as the technical arm of senior operations leadership in the field — leading site assessments and operational audits, driving team technical readiness ahead of site activation, reviewing designs and specifications from an operational lens, and feeding operational learnings back into the design and manufacturing organization as we shift toward a productized, repeatable build model. You will be the senior voice in the room on chillers, cooling towers, CDUs, and the liquid-cooling architectures that AI infrastructure increasingly depends
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