Staff Members

GBG team

GBG Head Office Berlin

Alexander Mahler
Interim Managing Director | Director Transport and Agricultural Policy
Master of Human Geography
Member of GBG Staff since 01/2012
Tel: +49-(0)30-76 23 991-55
alexander.mahler (at)

Dmitriy Romanov
B.A. Business Administration
Member of GBG Staff since 10/2016
Tel: +49-(0)30-76 23 991-32
dmitriy.romanov (at)

Andrea Wörle
Communications Officer
Diploma in Social Sciences
Member of GBG Staff since 11/2017
Tel: +49-(0)30-76 23 991-41
andrea.woerle (at)

Swantje Fiedler (née Küchler)
Deputy Managing Director | Director Energy Policy
M.A. European Studies
M.A. International Business Management
Member of GBG Staff since 07/2009
Tel: +49-(0)30-76 23 991-50
swantje.fiedler (at)

Lena Reuster
Research Associate Energy Policy
M.Sc. Economics
Member of GBG Staff since 08/2012
Tel: +49-(0)30-76 23 991-51
lena.reuster (at)

Rupert Wronski
Research Associate Energy Policy
M.A. Sustainability Economics and Management
Member of GBG Staff since 09/2013
Tel: +49-(0)30-76 23 991-52
rupert.wronski (at)

Florian Zerzawy
Research Associate Energy Policy
Diploma in Geography
Member of GBG staff since 07/2016
Tel.: +49-(0)30-76 23 991-54
florian.zerzawy (at)

Matthias Runkel
Research Associate Transport and Agricultural Policy
M.Sc. Economic Studies
Member of GBG Staff since 07/2014
Tel: +49-(0)30-76 23 991-56
matthias.runkel (at)

Jacqueline Cottrell
Senior Policy Advisor
M.A. History
M.A. International Peace & Security
Member of GBG Staff since 07/2004
jacqueline.cottrell (at)

Barbara Lück
Management Assistance
Member of GBG Staff since 01/2018
Tel: +49-(0)30-76 23 991-30
barbara.lueck (at)

Lisa Wötzel
Student assistant
M.A. Linguistics and Media Science
Member of GBG Staff since 07/2017
Tel: +49-(0)30-76 23 991-42
lisa.woetzel (at)

Current interns

Ann-Cathrin Beermann
Studies M.A. Political Science

Robin Fleet
Studied B.Sc. Economics

Simon Meemken
Studied B. Sc. Economics



Pictures: Stephanie Leisten