A strategic and operationally strong telecommunications leader, Diehl has significant experience in the sector across Latin America and Europe, with a solid track record of driving growth and results through organic and inorganic levers.

Having joined Deutsche Telekom in 2021 as Senior Vice President, B2C Europe, in 2022 he moved into his current role as CEO of Magenta Telekom, the Austrian subsidiary of Deutsche Telekom. He has also served on the supervisory boards of several Deutsche Telekom subsidiaries.

Prior to joining Deutsche Telekom, Diehl spent five years with Millicom as Group Chief Strategy Officer and CEO of the Panama subsidiary. Prior to that he spent twelve years at McKinsey & Company in Brazil and Germany, where he was a Partner in the telecommunications, media and tech practice.

Diehl graduated with honours in Business Administration from the University of Buenos Aires and holds an MBA from Harvard Business School.