Discover our team!
The greenTEG team consists of 30 specialists in engineering, materials science, physics, and electric engineering.

Who is greenTEG?

greenTEG’s team develops, manufactures, and markets thermal sensors for heat flux and laser power/position measurements and provides consulting on the thermal integration of its products. Today, greenTEG supplies OEMs as well as scientists in corporate and university labs around the world with its unique products.  All sensors are fully developed and manufactured in Zurich, Switzerland.

greenTEG’s board of directors is presided by Gianni Operto and consists of investors and independent members. The board brings in comprehensive experience and network in entrepreneurship, finance and the energy business.

Our Vision

We believe that IoT (Internet of Things) solutions will be essential in the future to improve the daily life by facilitating processes and workflow and optimizing time and energy consumption. With its unique technology – CORE body temperature monitor, greenTEG created the first non-invasive wearable that allows for continuous core body temperature under real-life conditions with great accuracy. This IoT-based technology offers a great support for the development of future technologies for remote patient monitoring, workplace Health and Safety, Sleep and Fertility tracking.  


Our Mission

“Developing cutting-edge sensor technologies to support innovation for various industries, while building an exceptional workplace and company which serves employees and customers based upon our sustainability linked values.”

Board of Managers
Dr. Wulf Glatz

Wulf received his PhD degree from ETH Zurich in 2008, where he developed flexible thermoelectric generators at the Micro and Nanosystems group. He has studied with several international institutions including the Universidad Politecnica de Valencia, Spain, the University of Oklahoma, USA and the Technical University of Braunschweig, Germany where he received his Diploma Degree in Mechanical Engineering in 2002. Wulf has gathered industry experience at the R&D departments of Volkswagen, BOSCH and IBM, working on thermal interfaces and micromechanical sensors for automotive applications.

Dr. Etienne Schwyter
VP Production | FOUNDER

Etienne holds a PhD (2013) degree from ETH Zurich for the development of a scalable fabrication process for thermoelectric devices, including a fully automated characterization setup for in-process and end-control device measurements. He is a founder of greenTEG and responsible for production. Etienne graduated with a degree in Electrical Engineering from ETH Zurich after gaining practical experience at Micronova in Finland, and the University of Calgary in Canada.

Dr. Holger Hendrichs

Holger holds a PhD (2010) from ETH Zurich (MTEC) and a diploma in Business Administration from KU Eichstätt-Ingolstadt with exchange semesters at Sophia University Tokyo and Comenius University Bratislava. He joined greenTEG in 2014 during a consulting project. Holger is member of the management board and responsible for Sales & Marketing. He brings to greenTEG his experience from former roles at McKinsey as a project leader and as independent consultant later on.

Dr. Lukas Durrer

Lukas obtained his MSc degree in Chemistry from the University of Bern (Switzerland) in 2005. In his studies, he specialized in structural biology at the Salk Institute in San Diego (USA) before starting his Master project in the electrochemistry and surface chemistry group. Later he moved to ETH Zürich (Switzerland) where he received his PhD on the topic of the synthesis and characterization of nanomaterials for sensing applications. He received the Georg Fischer prize for the best, most valuable and most original PhD thesis at the mechanical engineering department of the ETH Zürich. In 2009 he co-founded greenTEG. He has in-depth experience in R&D, business development and project management.

Michele Zahner
Head of Research & Development

Michele completed his master’s degree in materials science at ETH Zurich in 2011, where he mainly focused on the study of metals and polymers. Before joining greenTEG as one of the very first employees, he gained industrial experience working on the heat treatment of aluminium alloys and built up his knowledge in electrical engineering thanks to close collaboration with his brother, owner of an engineering company.

Board of Directors
Gianni Operto
Board of Directors President

Gianni Operto has more than 20 years of experience in Cleantech Venture Capital working for companies like Emerald or Good Energies. Prior he served as CEO of the Utility of Zurich (ewz) and as Vice President at ABB Power. Gianni Operto is mechanical engineer by education.

Dr. Werner Berner
Board of Directors

Werner Berner has a degree in mechanical engineering. He is also a physicist with a Ph.D. from the University of Berne. He worked in several management positions before co-founding PI precision implants AG in 1992. This company was merged with Plus Endoprothetik AG to Plus Orthopedics AG which was sold to Smith & Nephews in 2007. He is founder of the Berner Partners AG, which invests in early stage start-ups.

Dr. Pascal Gerner
Board of Directors

Pascal Gerner has ten years of experience in sales, marketing and product management of semiconductor sensor solutions. He studied Inorganic Chemistry at Berne (CH) and Bangor University (UK). He also holds a Ph.D. in non-linear optics and spectroscopy from the University of Berne. Mr. Gerner is currently Director of Sales & Marketing for humidity and gas sensor products at Sensirion AG.

Heinrich Köhler
Board of Directors

Mr. Köhler was managing director at Borgwaldt Flavor GmbH from 1988 until he sold the company in 2013. Previously he held managing positions at Deutsche Afrika Linien in Hamburg (Germany) and Lagos (Nigeria) where he also served as representative for Germany’s Federal Ministry for Economic Cooperation and Development. From 1968 to 1975, Mr. Köhler was second managing director at the Afrika Verein in Hamburg and in 1970 temporarily worked for Germany’s Federal Ministry of Economic Affairs in Osaka (Japan). He holds a degree in economics and is a marine officer. Today as well as in the past, Mr. Köhler held various honorary posts.

Beat Schillig
Board of Directors

Beat Schillig is a serial entrepreneur, board member, and business angel. He holds a Master’s degree in marketing from the University of St. Gallen. As the founder and president of IFJ and Venturelab, he has supported countless Swiss startups to become successful companies.