Founders & Partners



Melih Keyman

Melih Keyman is the original founder of KEYTRADE. Prior to founding KEYTRADE, he held leading positions in ENKA Marketing of Turkey and Transammonia, always working in the fertilizer sector. Mr. Keyman is a member of the Board of Directors of The Fertilizer Institute and an Ambassador of International Fertilizer Association. A native of Turkey and also a citizen of Switzerland, Mr. Keyman has been living in Zurich since 1984.


Andreas Vaterlaus

Andreas Vaterlaus, a Swiss citizen, joined KEYTRADE in 1997 as one of the four founding partners. Prior to his employment with KEYTRADE, he served in senior positions in the shipping industry and with Transammonia in the fertilizer sector. Mr. Vaterlaus is the Chairman of KEYTRADE AFRICA SA and Keytrade Iberia S.L.


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Leonardo Amaya

Leonardo Amaya joined KEYTRADE in 2012. Prior to joining KEYTRADE, he has worked in the agricultural industry since 2005 in both Tepeyac & ADM holding different positions in several departments throughout the supply chain while developing and leading new business units. A native of Mexico, he has a degree as an Industrial Engineer and an MBA.


Kurt Avunduk

Kurt Avunduk has worked since 2010 in the fertilizer industry. He is the product manager for phosphates and procures P&K worldwide. Before joining KEYTRADE, Kurt worked in sales for large conventions and exhibitions organized in Turkey. Kurt Avunduk has a degree in Finance and marketing and an MBA.


Monica Benavente

Monica Benavente joined KEYTRADE in 2011 as Legal Counsel. Prior joining KEYTRADE, she worked as Legal Counsel at the European Headquarters of a leading photovoltaic manufacturing company. Monica holds a Bachelor’s Degree in Law, a Bachelor’s Degree in Marketing, a Postgraduate in Maritime Law and a Master of Laws, LLM, from the Northwestern University of Chicago. Since 2016, she is also a Collaborator Professor in the Master in Lawyering at the Open University of Catalonia (UOC). She has double nationality, she is Spanish and also a Swiss citizen.


Cornelia Bircher

Cornelia Bircher, a Swiss citizen, joined KEYTRADE in 2011. Prior to joining KEYTRADE, she was working for 5 years in an international steel trading company. Ms. Cornelia Bircher is responsible for various European and CIS countries for both, sourcing and sales.


Errol Brandt

Errol Brandt, a Swiss citizen, joined KEYTRADE in 2000. Prior to joining KEYTRADE, he held several senior positions in Ernst & Young and Deloitte Touche Tohmatsu. Mr. Brandt is a board member of KEYTRADE AFRICA SA and Keytrade Iberia S.L.


Juan Manuel Gonzalez

Juan Manuel Gonzalez joined KEYTRADE in July 2000 as head of European trade. In 2006 he moved to Tampa to rebuild and manage the Latin American office for the company. Since 2010 he is back in Switzerland and added supervisory responsibilities over KEYTRADE'S Asian offices. A native of Spain, he started working in the fertilizer industry in 1997 in market research and wholesaling positions at German and Spanish companies. Today Mr. Gonzalez is the CEO of WeGrow AG, KEYTRADE’s designated entity for controlled and precision agriculture.


Roger Hartmann

Roger Hartmann, a Swiss citizen, joined KEYTRADE in 2011. After his studies at the University of Zurich he worked for several years for PriceWaterhouseCoopers in the financial services area, prior to joining KEYTRADE. Roger Hartmann holds a master degree in finance and is a Swiss Certified Public Accountant.


Ahmet Keyman

Ahmet Keyman is the urea product manager for KEYTRADE. Following his studies at Northwestern University and the Kellogg School of Management, Ahmet Keyman has joined KEYTRADE in 2012 and has had roles in the Singapore and Zurich offices. Born in Turkey, Ahmet is also a Swiss citizen.


René Leuenberger

René Leuenberger joined KEYTRADE in May 2011 as Legal Counsel. Prior to joining KEYTRADE, he worked in one of the leading law firms in Switzerland and in the financial services industry for several years. René Leuenberger is an attorney at law and holds a Bachelor and Master in Law from the University of Bern, Switzerland. In addition, he graduated from the Bern University of Applied Sciences with a Bachelor in Business Administration