Microsoft's Cloud Operations & Innovation (CO+I) is seeking a Critical Environment Senior Mechanical Engineer to join their team. CO+I is the engine that powers Microsoft's cloud services, managing a vast infrastructure of 200+ datacenters across 32 countries. This role combines mechanical engineering expertise with cloud infrastructure management, focusing on environmental sustainability and optimization in datacenter design and operations. The position offers significant growth opportunities through Career Rotation Programs, D&I initiatives, and professional certifications. You'll work on critical infrastructure supporting services used by 1+ billion customers and 20 million businesses globally. The role demands strong technical skills in mechanical engineering, design verification, and project management, with opportunities to influence decision-making and mentor other engineers. Microsoft offers competitive compensation, comprehensive benefits, and a culture focused on empowering every person and organization to achieve more.