Meet our team

Our people are our greatest assets. As a global company we come from a multitude of backgrounds, and we value the variety of ideas and perspectives. Next to our Executive Board and Supervisory Board we present our commercial leadership team here. Please do not hesitate to contact any member of our team for further information about EWT or our products.


Renger Idema
Chief Executive Officer

In 2018 Renger Idema was appointed as Chief Executive Officer. Renger joined EWT in 2008 and was appointed Chief Financial Officer and member of the Executive Board in 2012. He began his career at Ahold (food retail) and has held senior roles in operations and finance at Endemol (media) and Hagemeyer (electro technical wholesale). Renger is a Certified Public Accountant and holds a Master’s Degree in Business Administration from the University of Groningen, The Netherlands.

Mark Jonkhof
Chief Technology Officer

Mark Jonkhof joined EWT in 2015 as Chief Technology Officer. He started his career in 1995 at Philips Electronics in the field of industrial automation and manufacturing. In 2004 Mark switched to the Wind Industry and worked 11 years for General Electric. Between 2008 and 2012 Mark held full engineering responsibility for the successful implementation of GE’s Multi Megawatt platform and from 2012 to 2015 he led all Wind Technology Research at GE Global Research in Niskayuna, NY (USA).


The Supervisory Board is composed of high caliber, high profile members with extensive global networks. Members of the Supervisory Board are:

  • Rijkman Groenink (Chairman) – ex-Ceo ABN AMRO
  • Heleen van Poecke – Atlas Invest
  • Rob Kramer – Wedge Investments
  • Charles Vaslet – Partner Emerald Technology Ventures
  • Didier Ryelandt – Atlas Invest


Rob van de Veerdonk
Head of Sales & Business Development – Northern Europe

Rob van de Veerdonk is Head of Sales & Business Development Northern Europe. He is responsible for developing business in the entire North Europe region, including direct sales, project development and setting up operations and dealing with different incentives scheme, rules and regulations.

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Andrea Bartolini
Head of Sales & Business Development – Southern Europe

Andrea Bartolini is Head of Sales & Business Development Southern Europe. He is responsible for developing business in the entire Southern Europe region, including direct sales, project development and setting up operations and dealing with different incentives scheme, rules and regulations. Since 2016 he has successfully realized projects in Italy and Greece, including EWT’s largest project: a 22-turbine project on 10 Greek Islands for Greece’ largest power generation company PPC Renewables. Prior to EWT, Andrea had various business development roles within the wind energy industry where he developed the Italian Market and he supported the installation of many small and medium wind turbines.

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Joshi Raghavendra
Head of Sales & Business Development – Asia

Joshi Raghavendra is Head of Sales & Business Development Asia and General Manager EWT India. Joshi comes from a back ground of more than 15 years in Energy Sector. Last 12 years successfully in leadership role driving businesses across various energy portfolio. Most recent venture includes heading Renewable Energy business for ABB in South Asia Region for 150 MUSD business volume focusing on Solar PV & Microgrids. Earlier with AREVA Renewable in India driving Bioenergy business across India & South East Asian region plus Solar CSP project success of 100+ MUSD.

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Eric Holton
Head of Sales & Business Development – North America

Eric Holton is Head of Sales & Business Development for EWT Americas. He oversees all EWT business in the US and Canada, including direct sales, project development, and the company’s solar and energy storage initiatives. Eric’s first assignment upon joining EWT was a joint-venture project development campaign in New York, which resulted in the successful sale of the largest community solar portfolio in the US (88 MW). Prior to EWT, Eric led business development for a U.S. Department of Energy program called the PV Manufacturing Consortium, where he worked to align the US-based solar supply chain. He holds a B.S. in Applied Economics and Management from Cornell University and an M.S. in Nanoscale Engineering from the University at Albany.

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Marcel Ploeg
Head of Supply Chain

As Head of Supply Chain Marcel Ploeg is responsible for the global procurement, the logistics of all the components and for the main warehouse at the EWT headquarters in Amersfoort, the Netherlands. Marcel joined EWT in 2014 as Senior Buyer responsible for the purchasing of the main mechanical building blocks (anchor, tower, bearing, hub and nacelle) and the generator. Prior to EWT Marcel worked at H.J. Heinz Company as a European Buyer responsible for the execution of capital expenditure projects within Europe and the development of capital procurement strategies including the establishment of strategic source plans with the involvement of key stakeholders. Marcel started his career in 2005 as a project Purchaser at Technip Benelux, one of the five largest engineering, technologies and project management companies for the oil & gas industry.

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Daan Cramer
Manager Operations & Maintenance

Daan Cramer started working for EWT in 2012 as a freelance expediter at a tower manufacturing plant. In 2013 he joined the operations department as Project Manager and at the end of 2017 he took the position of Manager Operations & Maintenance. As Manager Operations & Maintenance Daan is responsible for all installations, operations and service activities of EWT turbines around the world. Prior to joining EWT Daan traveled around the world, working for different motorsport teams for over 12 years.

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Lisa Bryan
Commercial leader Operations & Maintenance

Lisa Bryan, joined EWT in 2018, responsible for developing the multi-brand O&M business, selling performance improvement packages on existing fleet and negotiating O&M contract extensions and renewals. Her career in renewables began in 2007 at NAREC (National Renewable Energy Centre) in the UK where she was a Business Development Manager responsible for wind turbine blade testing, marine device testing and selling engineering consultancy. In 2013, she joined Siemens. During her 4.5 years with Siemens she worked in the O&M/Service business unit, first as a Commercial Sales Manager for offshore wind projects and then, for 3.5 years, as a Technical Sales Manager in onshore wind, leading sales efforts for service and maintenance contracts for both new unit turbines and post warranty contract renewals.

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Michiel Fornier
Manager Corporate Development & Company Secretary

Michiel Fornier is responsible for EWT’s corporate development activities, focusing on M&A, strategic partnerships, new business activities and public affairs and – relations. In addition Michiel is responsible for managing the company secretary function, acting as secretary to the Management Board and the Supervisory Board. Between 2013 and 2018 Michiel was EWT’s general counsel and held full responsibility for EWT’s legal and corporate affairs.

Michiel joined EWT in 2011 in the legal department. He started his career as an attorney in 2002 with a practice focusing on IP, corporate and commercial advice and – litigation and M&A. Michiel holds a master’s degree in Law from the University of Amsterdam, the Netherlands.

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