Microsoft's Cloud Operations & Innovation (CO+I) is seeking a Critical Environment Senior Mechanical Engineer to join their team. This role is crucial in delivering core infrastructure and foundational technologies for Microsoft's vast network of datacenters across 32 countries. The position involves complex hardware engineering, design implementation, and project management for Microsoft's cloud services infrastructure that supports over 1 billion customers worldwide. The ideal candidate will contribute to environmental sustainability initiatives while managing and developing solutions for datacenter operations. This role offers significant growth opportunities through Career Rotation Programs, professional certifications, and a culture focused on personal development. With a competitive salary range of $117,200 - $229,200 and comprehensive benefits, this position represents an opportunity to work at the forefront of cloud infrastructure technology while making a global impact.