A Data Center Mechanical Subject Matter Expert is an integral professional responsible for optimizing and maintaining the mechanical systems that ensure data centers perform effectively and efficiently. They serve as a knowledgeable bridge between the technical and operational aspects of data center infrastructure. MSMEs have a strong understanding of heating, ventilation, and air conditioning (HVAC) systems, cooling strategies, free-cooling technologies, and energy efficiency measures, and assist with design and implement mechanical solutions to meet the specific cooling requirements of server racks and data processing equipment. They conduct regular audits, analyze performance data, and identify potential issues that could impact data center reliability or energy consumption. MSMEs continuously learn and stay updated with industry trends and technologies. This position emphasizes collaboration with cross-functional teams, including engineers, IT professionals, and facility managers to develop cost-effective and comprehensive solutions for data center cooling functionality and efficiency, contributing to the overall success of critical data center operations.