As vice president of Data Center Technology and Engineering Group, and chief engineering officer at Interxion, Lex has supervised the design, build and upgrade of more than 55,000m² of data center space in 34 locations and 11 countries. During the past 25 years, he has built exceptionally strong credentials in the design of versatile, cost-effective and energy-efficient data center infrastructure. Lex has pioneered several new approaches to data center design and management, including the improvement of power ratio efficiency between server load and transformer load, and the industry’s first ever modular approach to data center architecture. Lex is a founder member of the Uptime Institute, a member of the European Commission DG Joint Research Committee on Sustainability and the European Data Center Code of Conduct Metrics Group. He also acts as Liaison Officer for The Green Grid in their collaboration with the European Commission, and he was a member of the Executive Advisory Board for the Uptime Institute’s New York symposium, “Data Center Efficiency & Green Enterprise IT.”