Steffen Roehn

Dr. Steffen Roehn serves as chairman of the board of TM Forum since 2019 and successfully drives industry collaboration together with his fellow board members and the TM Forum’s leadership team. Steffen is an Expert Partner in the Enterprise Technology and CME practices based in Bain & Company’s Frankfurt office. He has 20 years of consulting and 12 years of chief information officer experience and is an expert in IT, digital and telecommunications, technology and insurance.
2014 - 2019, Steffen was advisor to the chairman of Reliance Industries Group (Mumbai, India) where he helped to launch and grow a pan-Indian 4G and FTTx operator from scratch (Reliance Jio). Reliance Jio is the largest mobile data network in the world and has pushed India to number one in terms of mobile data usage worldwide. He also serves as supervisory and advisory board member of various technology and startup companies.
Steffen joined the Deutsche Telekom Group in November 2000 as Board Member IT at T-Mobile Germany and became Global CIO of T-Mobile in 2006 and Group-CIO of Deutsche Telekom in 2009. He served as member of the board of directors of the TM Forum during his time at Deutsche Telekom and rejoined the board in January 2018 for Reliance Jio.
Prior to Deutsche Telekom, Steffen successfully advised telecommunications, high-tech, financial services and consumer goods industry companies as CEO of the Diebold Management Consulting Group and Principal of global firm, Gemini Consulting. He has a Ph.D. in physics from University of Mainz, based upon research done at the European Research Lab CERN in Geneva.