Management & divisions

Christoph Schmidt has been managing director of Grün Berlin GmbH since 2008. Since 2013, he has been chairman of the board of the Grün Berlin Stiftung. He also represents Grün Berlin GmbH as a shareholder of Grün Berlin Service GmbH, GB infraVelo GmbH and GB infraSignal GmbH. From 2010 to 2018, he was Managing Director of IGA Berlin 2017 GmbH, and from 2017 to 2018, Chairman of the Board of GB infraVelo GmbH. He has been Managing Director of GB infraVelo GmbH again since March 2024.

Before joining Grün Berlin GmbH, Christoph Schmidt worked as a senior project manager and division manager at HafenCity Hamburg GmbH from 2003 to 2008. Until 2002, he held various positions in Berlin as project manager and office manager.

Christoph Schmidt holds a degree in landscape architecture from the Technical University of Berlin. He is also a specialist engineer in project development and studied project management/construction management at the Bauhaus University Weimar.

Jörg Stohl has headed the Internal Services division of Grün Berlin GmbH since October 2017. He represents Grün Berlin GmbH as authorised signatory and the Grün Berlin Stiftung as deputy board member.

Before joining Grün Berlin, Jörg Stohl was head of administration at the Fraunhofer Heinrich Hertz Institute, senior consultant at PSI AG (where he was project manager for the introduction of the HGV toll in Germany on behalf of the Federal Office for Goods Transport, among others), IT manager and major project manager (including supply and disposal for the world exhibition) at EXPO2000 Hannover GmbH, commercial manager at GS-Bau GmbH & Co.KG and organisational programmer at Philips Kommunikations-Industrie AG.

Jörg Stohl is a trained data processing clerk and graduate in business informatics.

Sven Haberecht has worked in the commercial area for Grün Berlin GmbH since 1994. He manages the finance department of the Grün Berlin companies.

Since 2010, he has been an authorised signatory of Grün Berlin Service GmbH, and since 2017 he has been its managing director. Since 2013, Sven Haberecht has been one of three special representatives of the Grün Berlin Foundation. From 2013 to 2018 he was an authorised representative of IGA Berlin 2017 GmbH, and from 2018 to 2020 liquidator.

Before joining Grün Berlin GmbH, Sven Haberecht worked in operations management at a large Berlin coffee roasting company, among other positions.

He successfully completed his studies in business administration at the University of Applied Sciences in Berlin in 1989.

Angela Grönewald has been working in the field of project development and implementation at the predecessor companies of Grün Berlin GmbH since 1989. At the beginning at the Bundesgartenschau 1995 GmbH, then the successor companies and since 2011 at Grün Berlin GmbH.

From 2018 to 2020, she was Business Unit Manager for Strategy, Project and Properties for the core business of Grün Berlin GmbH, and since January 2021, Angela Grönewald has held the position of Staff Manager for Strategy and Financing.

From 2013 to 2018, she was an authorised signatory of IGA 2017 GmbH. Since 2014, Angela Grönewald has been a special representative of the Grün Berlin Stiftung. She represents infraVelo GmbH as an authorised signatory.

Before joining Grün Berlin GmbH (and its predecessor companies), Angela Grönewald worked in a planning office and in agencies.

Angela Grönewald is a graduate engineer in landscape planning and studied at the TU Berlin.

In January 2023, Katharina Marienhagen took over the management of the new Grün Berlin subsidiary GB infraSignal GmbH.

Most recently, she was Head of Traffic Engineering Region North at Siemens Mobility for six years, where she was responsible for planning and implementing traffic signal projects with traffic planners and programmers. She also worked as a traffic planner in road traffic engineering.

Katharina Marienhagen graduated from the Technical University of Dresden in 1994 with a degree in traffic systems engineering.

Katharina Marienhagen was born in Erfurt in 1969.