Posted Sep 22, 2026

Senior Mechanical Engineer | Mission Critical | Remote

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Senior Mechanical Engineer - Mission Critical | Hyperscale Data Centers 📍 Austin TX or Remote (US-based) | Full-Time | Salary range TBC Plan B is retained exclusively by a leading multi-discipline building systems consultancy - a recognised expert in Mission Critical, Science & Technology, and Industrial sectors with 30+ years delivering high-performance engineering solutions - to find a Senior Mechanical Engineer to lead and grow their data center mechanical team. This is a senior technical leadership role on hyperscale and mission critical data center programmes, with real ownership over the mechanical practice and the team behind it. The Role: • Lead mechanical design from basis of design through construction documents and construction administration • Direct cooling system design - chilled water plants, CRAC/CRAH units, air handling, piping distribution, and heat rejection systems • Own HVAC design for mission critical and support spaces, including redundancy and resiliency strategy • Lead energy modeling and system selection to balance efficiency, reliability, and cost • Drive interdisciplinary coordination across electrical, controls, FP, structural, and BIM/VDC teams • Lead and grow a team of mechanical engineers - mentoring, reviewing work, and building repeatable design standards • Lead client and contractor engagement - design reviews, RFIs, submittals, and field issue resolution What our client is looking for: • Bachelor's degree in Mechanical Engineering (or equivalent) • 8+ years of progressive mechanical engineering experience with a strong mission critical / data center focus • Hyperscale data center experience strongly preferred • Proven experience leading or mentoring a team of engineers • Solid knowledge of ASHRAE standards, building codes, and mechanical safety principles • Proficiency in Revit and/or AutoCAD; comfortable in BIM/VDC workflows • Strong communicator, able to lead technical discussions with clients, utilities, and contractors Desirable: • PE licence (or actively working toward one) • Familiarity with TIA-942 and data center resiliency/tier concepts • Experience with energy modeling or CFD tools (IES, Trane TRACE, Carrier HAP or similar) • Fast-track, design-assist, and complex phasing experience • Commissioning coordination background What's on offer: • Fully remote role with occasional site visits (typically 10–25% travel) • Competitive salary + comprehensive benefits • Partial ESOP - share in the company's success • Structured path to partnership / leadership • Genuine investment in your professional development - training, industry events, CPD, and more Interested? Send me a direct message or hit apply below and I'll be in touch within 48 hours. All applications are treated in the strictest confidence.