Generation Change in Top Management


ControlExpert continues generation change in top management. Nicolas Witte takes over from Kai Siersleben


The global digitalization and automation expert in claims and maintenance processes in the automotive industry, ControlExpert, is about to change the CEO position in the company.

After nearly 9 years as co-founder, shareholder and CEO of ControlExpert, Kai Siersleben hands over his position in the company to Nicolas Witte.

With Kai Siersleben, who successfully managed AUTOonline prior, ControlExpert has developed from a German company to an international player in the claims management industry. ControlExpert today is working in 16 countries, between 2010 and 2018 the company has quadrupled in size.

“Kai Siersleben has shaped the development of ControlExpert over the prior years. His entrepreneurial vision, his sales and conversion power, his international experience and his success in our industry have made ControlExpert the market leader. I thank Kai for his commitment, his ambition and his loyalty” so Gerhard Witte, founder and Managing Director of ControlExpert.

Kai Siersleben has decided to transition from his CEO position into the board of ControlExpert, the governing body of the company. He also continues to be a shareholder.
With Nicolas Witte, a manager takes over the CEO role, who will strengthen and expand the market leader position by focusing on data science and product development. This will help ControlExpert to stay ahead in the fast-moving areas of automation and artificial intelligence in the insurance and maintenance industry.

Nicolas Witte has been with ControlExpert since 2010 and since the beginning of 2017 has served in a Managing Director capacity. His focus areas are data science, digitalization and the development of new market segments.
“With the transition of leadership to Nicolas Witte, we will continue the success story of ControlExpert with growing competences in digitalization. I wish him all the best and success in his new role” so Kai Siersleben.
“I am very happy that our shareholders chose me as the new CEO of ControlExpert. Together with our top-management, I will use this trust to lead the company into the future. I am highly motivated for this big opportunity and responsibility, which I will use to take ControlExpert with new products and new markets onto the next level” so Nicolas Witte.

ControlExpert – Redefining Rules

ControlExpert digitizes manual processes of insurance and leasing companies, body shops, and OEMs in the automotive industry. The service provider started in 2002. Today Langenfeld’s high-tech-company is the digitalization expert of Germany.

Over the years, the knowledge of car experts was increasingly standardized in databases along with manufacturer data. This unique combination of IT and vehicle expertise is the recipe for success. Today ControlExpert is able to perform audits of appraisals, estimates, invoices, and maintenance documents in a mostly fully automated way.

Nowadays the service provider audits more than 9 million vehicle claims per year with the help of over 800 colleagues in 16 countries. Each country has individualized products and services that are tailored to local requirements. Our customers include all major insurance and leasing companies, body shops and OEMs.


From the left: Gerhard Witte, Kai Siersleben, Nicolas Witte

Press contact:
ControlExpert GmbH
Beatrix Paeßens, Head of Marketing
Marie-Curie-Straße 3
40764 Langenfeld | Germany
T: +49 (0) 2173 / 84 9 84 - 638
M: +49 (0) 151 527 217 70
Mail: b.paessens(at)