Since 2012, the company has been led by founder and managing director Jan Rotard – supported since 2023 by Dr. Holger Quast.

Managing directors

Jan Rotard (l), CEO, is responsible for marketing, sales, product management, finances and staff as well as software and electronics development at Vemcon GmbH. Early in life he drove and repaired machines, later he designed and built them. Before his time at Vemcon he worked on different development and construction projects for companies like Lehnhoff Hartstahl, Kinshofer and others. In total, he has more than 15 years of industry experience. Rotard has a degree in mechanical engineering as well as aerospace technology.


Dr. Holger Quast (r), COO/CFO, has implemented innovative technologies into revenue-generating business in various positions throughout his professional career. Since 2023, he advances the digitalization of construction machinery with Vemcon as COO/CFO. Previously, Holger was responsible for Toptica Photonics’ business in biophotonics and semicon. After completing his doctorate in physics at the TU Berlin, Holger founded start-ups and transferred Siemens technology into new businesses.




Willem Bulthuis has been active in the international technology sector for 30 years. His roles have included Board Member, CTO and Global Head of Sales at Philips Electronics, NXP Semiconductors, Giesecke & Devrient and secunet Security Networks AG. He has lived in both Silicon Valley and in Europe with experience in a range of industries such as automotive, consumer electronics, semiconductors, media, telecoms, payment and IT security. He is Founding Partner of Mittelstand Ventures, managing Corporate Venture Capital units for family-owned companies.