The office in Stuttgart is the central point for all DGNB activities. The team manages the entire certification process, from project registration to the awarding of certificates, runs training courses, coordinates committee work and supports the DGNB expert pool, implements international activities and cooperations, organises workshops and events, arranges speakers and takes care of publications. The DGNB office also supports the board of directors in organising the general meeting and the committees in their activities. It is the interface for the exchange of information between all members, building owners and DGNB Auditors.
If you have any questions, please do not hesitate to contact the DGNB office!
Executive Board
Dr. Christine Lemaitre
Chief Executive Officer DGNB e.V.
Phone: +49-711-722322-0
Email: c.lemaitre@dgnb.de
| since 2026 | Member of the Foundation Board of the 'Lebendige Stadt' Foundation |
since 2023 | Chair of the Board of Directors of the Cradle to Cradle Products Innovation Institute |
since 2023 | Member of the Climate Advisory Board of solid UNIT |
since 2022 | Member of the Supervisory Board of boden & bauschutt |
since 2021 | Member of the Scientific Advisory Board of the German Institute for Urban Architecture |
since 2021 | Chair of the Climate Positive Europe Alliance (CPEA) |
| since 2019 | Founder and Board Member of the Knowledge Foundation |
2019-2022 | Board Member of the Cradle to Cradle Products Innovation Institute |
2019 | Winner of the Global Green Economic Forum's Eco Innovator Award 2019 |
2019 | Awarded the W.I.R.E. Award 2019 (Women in Real Estate) by Heuer Dialog GmbH |
2017 | Co-initiator of the international planning initiative "Building Sense Now" |
since 2016 | Member of the Sustainability Council of the German Property Federation (ZIA) |
since 2016 | Member of the Advisory Board of the Network Baukultur Baden-Württemberg |
2016-2020 | Member of the Board of Directors of the World Green Building Council (WGBC) |
2015-2019 | Chair of the European Regional Network (ERN) |
since 2010 | Chief Executive Officer of the German Sustainable Building Council – DGNB e.V. |
2009-2010 | Head of the System Department at the German Sustainable Building Council – DGNB e.V. |
2008 | Doctorate on the topic of "Topology optimization of adaptive beam structures" |
2007-2008 | Project Manager for the research project "Resource-efficient buildings" at Bilfinger Berger AG (now Bilfinger SE) |
2003-2007 | Research Assistant in the field of teaching and research at the Institute for Lightweight Structures and Construction (ILEK) at the University of Stuttgart |
2000-2002 | Professional stay in the USA as a structural engineer |
1995-2000 | Studied civil engineering at the University of Stuttgart |
1975 | Born in Giessen |
Johannes Kreißig
Chief Executive Officer DGNB e.V. and DGNB GmbH
Phone: +49-711-722322-0
Email: j.kreissig@dgnb.de
2020-2026 | Board member, World Green Building Council (WGBC) |
since 2020 | Chairman of the supervisory board of the Helios PV energy cooperative |
| since 2019 | Member of the Board of Trustees of the Knowledge Foundation |
since 2018 | Chief Executive Officer of the German Sustainable Building Council – DGNB e.V. |
since 2017 | Member of the Advisory board of the Institute for Building and Environment (IBU) |
since 2016 | Managing Director of the German Sustainable Building Society – DGNB GmbH |
2010-2016 | Board member of the World Green Building Council (WGBC) |
2007-2015 | Board member of the German Sustainable Building Council – DGNB e.V. |
2001-2016 | Co-founder of thinkstep AG (formerly PE INTERNATIONAL; today part of Sphera AG), most recently: Vice President Building & Construction |
1998-2001 | Head of the department "Holistic Accounting" at the Institute for Plastics Science and Testing (IKP) at the University of Stuttgart |
1993-1998 | Research assistant at the Institute for Plastics Science and Testing (IKP) at the University of Stuttgart |
1987-1993 | Studied mechanical engineering at the University of Stuttgart and Tucson, Arizona |
1967 | Born in Ulm |
Markus Kelzenberg
Chief Executive Officer DGNB GmbH / Certification Body
Phone: +49-711-722322-75
Email: m.kelzenberg@dgnb.de
Assistance
Finance and Administration
Marianna Sip
Deputy Director / Manager Legal and Human Resources
- Phone: +49-711-722322-41
- Email: m.sip@dgnb.de
Nina Breuer
Apprentice Management Assistant for Office Communication
- Phone: +49-711-722322-159
- Email: n.breuer@dgnb.de
Hlib Nabatov
Apprentice Management Assistant for Office Communication
- Phone: +49-711-722322-105
- Email: h.nabatov@dgnb.de
Stefanie Robeller
Certification Contracts and Invoices
- Phone: +49-711-722322-91
- Email: s.robeller@dgnb.de
Anna Lena Taubert
Certification Contracts and Invoices
- Phone: +49-711-722322-34
- Email: a.taubert@dgnb.de
Alexandra Traub
Certification Contracts and Invoices
- Phone: +49-711-722322-107
- Email: a.traub@dgnb.de
Kim Witzke
Apprentice Management Assistant for Office Communication
- Phone: +49-711-722322-126
- Email: k.witzke@dgnb.de
PR, Communications and Marketing
Felix Jansen
Director PR, Communications and Marketing
- Phone: +49-711-722322-32
- Email: f.jansen@dgnb.de
Paul Bandowski
Project Manager Content Creation
- Phone: +49-711-722322-144
- Email: p.bandowski@dgnb.de
Falk Müller-Sommer
Project Manager Marketing
- Phone: +49-711-722322-73
- Email: f.mueller-sommer@dgnb.de
Kristina Tunukovic
Dual Student Business Administration
- Phone: +49-711-722322-0
- Email: k.tunukovic@dgnb.de
Research and Development
Dr. Kathrin Quante
Deputy Director / Manager System Development
- Phone: +49-711-722322-87
- Email: k.quante@dgnb.de
Carla Schweizer
Project Manager Research Projects
- Phone: +49-711-722322-90
- Email: c.schweizer@dgnb.de
Eva-Maria Stumpp
Research and Development, focus climate adaptation
- Phone: +49-711-722322-82
- Email: em.stumpp@dgnb.de
Network and Association Work
Matthias Schäpers
Director Network and Association Work
- Phone: +49-711-722322-95
- Email: m.schaepers@dgnb.de
Katrin Wolf
Deputy Director / Manager Trade Fairs, Events and Partnerships
- Phone: +49-711-722322-38
- Email: k.wolf@dgnb.de
Jana Asia Alpaslan
Project Manager Climate Positive Cities and Communities
- Phone: +49-711-722322-161
- Email: j.alpaslan@dgnb.de
Christine Klingel
Project Manager Trade Fairs and Events
- Phone: +49-711-722322-139
- Email: c.klingel@dgnb.de
Dr. Harry Leuter
Consultant Cities & Certification Districts
- Phone: +49-711-722322-121
- Email: h.leuter@dgnb.de
Johannes Moser
Advisor International Association Work
- Phone: +49-711-722322-43
- Email: j.moser@dgnb.de
Simone Pitzal
Senior Project Manager Trade Fairs and Events
- Phone: +49-711-722322-60
- Email: s.pitzal@dgnb.de
Vipul Sarnot
Project Manager Initiative Sustainable Finance in the Built Environment
- Phone: +49-711-722322-62
- Email: v.sarnot@dgnb.de
Julia Treiber
Project Manager Trade Fairs and Events
- Phone: +49-711-722322-29
- Email: j.treiber@dgnb.de
Angelina Wenzel
Project Manager Events and Speaker Service
- Phone: +49-711-722322-76
- Email: a.wenzel@dgnb.de
DGNB Academy
Tamea Rittershofer
Manager Training and Customer Service
- Phone: +49-711-722322-64
- Email: t.rittershofer@dgnb.de
Elena Zuliani
Further Education Certification Experts
- Phone: +49-711-722322-27
- Email: e.zuliani@dgnb.de
DGNB Certification
Angelika Bandke
Senior Consultant Serial Certification
- Phone: +49-711-722322-44
- Email: a.bandke@dgnb.de
Svenja Bernhard
Consultant Certification / Buildings in Use
- Phone: +49-711-722322-158
- Email: s.bernhard@dgnb.de
Martha Brachthäuser
Certification Renovation
- Phone: +49-711-722322-157
- Email: m.brachthaeuser@dgnb.de
Alina Bujtas
Project Manager Certification Buildings in Use
- Phone: +49-711-722322-131
- Email: a.bujtas@dgnb.de
Jenny Goldbach
Certification / Buildings in Use / LCA Software Approval
- Phone: +49-711-722322-173
- Email: j.goldbach@dgnb.de
Melisa Körükmez
Senior Consultant Certification Buildings In Use
- Phone: +49-711-722322-52
- Email: m.koeruekmez@dgnb.de
Sreeparna Mitra
International Certification and Trainings
- Phone: +49-711-722322-88
- Email: s.mitra@dgnb.de
Archie Parakh
Consultant ESG-Verification for the EU Taxonomy
- Phone: +49-711-722322-175
- Email: a.parakh@dgnb.de
Dr. Consolata Russelli
Senior Consultant Multiple Certification
- Phone: +49-711-722322-177
- Email: c.russelli@dgnb.de
Simone Schäfer
Project Manager ESG-Verification for the EU Taxonomy
- Phone: +49-711-722322-134
- Email: s.schaefer@dgnb.de
Karen Sternsdorff
Senior Consultant Certification Buildings
- Phone: +49-711-722322-33
- Email: k.sternsdorff@dgnb.de
René Traunspurger
Senior Consultant Certification Buildings
- Phone: +49-711-722322-49
- Email: r.traunspurger@dgnb.de
Julia Weißert
Certification / Life Cycle Assessment
- Phone: +49-711-722322-179
- Email: j.weissert@dgnb.de
Kai Zhang
Senior Consultant Certification Buildings / Serial Certification
- Phone: +49-711-722322-24
- Email: k.zhang@dgnb.de
Certification Body
Markus Kelzenberg
Chief Executive Officer DGNB GmbH / Certification Body
- Phone: +49-711-722322-75
- Email: m.kelzenberg@dgnb.de
Helen Brinschwitz
Certification Administration
- Phone: +49-711-722322-127
- Email: h.brinschwitz@dgnb.de
Kaya Lange
Certification / Product Label Recognition / DGNB Recognised Services
- Phone: +49-711-722322-151
- Email: k.lange@dgnb.de
Digitalisation
Laura Finkele
Deputy Director / Manager Digitalisation
- Phone: +49-711-722322-78
- Email: l.finkele@dgnb.de
Diandra Hermann
Project Manager DGNB Software | UX/UI Designer
- Phone: +49-711-722322-124
- Email: d.hermann@dgnb.de
Nora Seewald
Project Manager Online / UX/UI Designer
- Phone: +49-711-722322-100
- Email: n.seewald@dgnb.de