Joost Knoll - Chief Executive Officer and Director

Joost joined Greengas on 1 December 2011. He brings more than 25 years of experience to the company, in both increasing and managing international business in the industrial construction, waste, and energy market.

Over the past decade, Joost successfully lead the Hertel Group as Chief Executive Officer, during which time the company achieved strong international growth. Prior to this, Joost held various senior leadership positions at Browning Ferris Industries, Waste Management and AVR the Netherlands. During this time he developed a broad international experience in waste management and industrial & offshore services and construction.

Joost Knoll (51) has a BSc from Rotterdam University and followed an MBA at Henley Business School - University of Reading. Joost resides in the Netherlands.

Claudia Mennen-Vermeule - Chief Financial Officer and Director

Claudia has extensive experience with capital market transactions from previous positions as Vice President Finance and acting CFO with the Dockwise Group. 

At Dockwise Claudia was part of the project team for the sale of the group to 3i, a private investment equity firm, responsible for re-financing, several acquisitions and the initial public offering (IPO) at the Oslo Stock Exchange in 2007. In addition, she was acting CFO during the process of capital raising and listing at NYSE Euronext stock market in 2009. Prior to joining the Dockwise Group, Claudia was part of the audit practice of PricewaterhouseCoopers for nearly 10 years and was mainly involved in the audit of international Dutch headquartered groups. 

Claudia holds a master degree in Information Technology from the University of Tilburg and is a Dutch Certified Public Accountant. She is a Dutch citizen and resides in the Netherlands.

Antonín Kunz - Managing Director of Green Gas DPB

Antonin joined the Drilling Division of OKD, DPB a.s. in 1986, he fulfilled many successful roles in the division and was appointed as Head of the Drilling Division in 1995. In 1996 he was appointed as Production Director. After the merger with Green Gas in 2007, he was appointed as Managing Director for the newly renamed company, Green Gas DPB.

Over the years, Antonin has become an expert in mine gas and mine services management, including gas and electricity management; mine gas utilisation and CHP production; mine and natural gas exploration, production and distribution; as well as international drilling and geological engineering (Slovakia, Turkey, Poland, Switzerland and Greece).

Antonin obtained a degree from the faculty of Mines and Geology, at the University of Mining in Ostrava, Czech Republic and a degree from the Swinburne University of Technology in Melbourne, Australia. 

Duncan G Cox - President and Chairman - Green Gas Americas Inc.

Duncan Joined Green Gas International in August 2007 as the Chairman of Green Gas America and in early 2009 added to his role the position President. In this role Duncan is responsible for operating the Americas business unit including business development, executing all projects and managing all assets and facilities in both North America and South America.

Duncan is a Professional Engineer who has more than 25 years of diverse experience working as COO, CEO and Managing Director for various major international firms in Canada, USA and UK. These firms were all involved in manufacturing, engineering, procurement and construction of infrastructure projects. These infrastructure projects consisted of bridges, stadiums, rapid transit, thermal power plants, transmission lines and pressure vessels and notably in worldwide emerging markets.

Duncan has a Bachelors of Applied Science in Mechanical Engineering From the University of Waterloo in Canada.