Senior Mechanical Design Engineer

Senior Mechanical Design Engineer - Remote (Europe) Join a rapidly growing AI-focused hyperscaler delivering the next generation of high-density GPU data centres across Europe and globally. As a Senior Mechanical Design Engineer, you'll shape mechanical and cooling strategy across new hyperscale campuses, from early site assessment through to construction, commissioning and live operations. Working closely with Site Acquisition, Technical Due Diligence, Engineering and Construction teams, you'll have genuine influence over global design standards while working on complex AI/HPC infrastructure and regularly travelling to prospective sites across EMEA and internationally. Responsibilities Lead mechanical and HVAC design across new hyperscale data centre builds and major campus expansionsAssess prospective sites, evaluating mechanical infrastructure, cooling capacity, technical risks and feasibilityDefine and standardise mechanical and cooling design principles across multiple regionsReview and challenge consultant, contractor and vendor designs throughout design and constructionSupport commissioning, handover and continuous improvement of global mechanical design standards Required Skills & Experience Strong mechanical engineering background within hyperscale or large-scale data centre environmentsExtensive experience designing and reviewing HVAC and critical cooling systemsExperience assessing new sites or supporting early-stage data centre/infrastructure developmentStrong understanding of high-density cooling for AI and HPC environmentsExperience across design, construction and commissioning, with confidence challenging consultants and vendors