Dr. Dietmar Nienstedt
Graduate Economist, Graduate Business Economist, Dr. rer. pol. (Economics, Econometrics)
Director
Dr. Dietmar Nienstedt has been with WINTERGERST since 2025, working as a Director in Corporate Finance/M&A. His professional focus lies on advising companies and investors during corporate acquisitions and sales as well as in the fields of financing, corporate and growth strategies and post-merger integration/carve-out projects.


Dietmar has more than 15 years of experience in advising medium-sized and group companies as well as financial investors. With more than 17 years of experience in renowned companies such as Boehringer Ingelheim, Arrow Electronics, LANXESS and Deutsche Post DHL Group, especially in the fields of corporate development and corporate/M&A, he has built up extensive expertise. Dietmar spent 11 years as Senior Vice President and Global Head of M&A at Deutsche Post DHL Group. He completed his Diplom-Volkswirt and Diplom-Betriebswirt as well as his Doktor rerum politicarum with summa cum laude at the University of Cologne. He is also a lecturer at the Frankfurt School of Finance & Management in Frankfurt am Main. Outside of work, Dietmar enjoys cycling, relaxing with family and friends, reading and traveling. He also plays piano.