The culture of our company may be summarised as: reliability & continuity in partnerships, technical innovation and a forward thinking business orientation.

Due to the nature of the business, TB&C works with experienced professional managers from the European engineering industry. The values from this industrie are reflected in our high engineering standards, solution oriented thinking and high quality standard. This drives our increasing sales and profitability.


Derk te Bokkel, CEO 

DerkDerk te Bokkel (1961) holds an engineering degree with business management qualification. He has worked with a number of large industrial corporations in the Oil & Gas, Industrial Services and Power industries, before establishing himself as an entrepreneur in 1998. Initially acting as consultant and interim-manager to large multinationals in carve-out projects, he bought several production departments out of Philips Electronics as entrepreneur during the early 2000’s.

After successfully establishing the TB&C Group he liquidated his consultancy activities and moved to a supervisory board function at TB&C in 2006. In that year he went back to line functions as division director and board member in public and private corporations with up to 1 billion USD revenue for a number of years before returning to TB&C as CEO in 2012.

In that capacity he is responsible for strategy and organizational development, most importantly the roll-out of the international growth strategy of the Group. Besides this he focusses on relationships with stakeholders, encompassing key clients, personnel and shareholders, among which a private equity fund.
Next to his activities at TB&C, he holds a supervisory board mandate at a fast growing family-owned OEM in the automotive industry (special transport and waste collection vehicles) with ca. 1 billion USD revenue.

Derk is married, lives in The Netherlands and has four children. He likes endurance sports (speed skating, cycling) and off shore sailing.


Hartmut Groos, CTO 


Hartmut Groos (1953) joined the company in 1999 when he restructured the “Outsert Department” within Philips and incorporated the business functions into the production organization of Philips Optical Components to form an independent profit centre.

Originally a toolmaker by education, he assumed responsibilities as a supply-base manager from in charge of three locations in Germany, as well one in Mexico and Hungary all together with a purchasing turnover of approximately €100m from 1995 until 1999. In addition to his experience in purchasing, he also was responsible for quality management and production during his Philips years. He became shareholder of the TB&C Group in 2004 through an MBI.

In the TB&C Group Hartmut holds responsibility for the production site in Herborn, technological investments as well as the technical risk management.

Next to his work at the TB&C Group he holds a supervisory board mandate at a technology business in Bavaria and works as a lay judge at the industrial tribunal in Gießen for more than 10 years.

Hartmut is married and as a daughter. He spends his free time with family, friends and the upkeep of his fish pond.


Martijn Merkx, CCO


Martijn Merkx (1979) holds an engineering degree. He started his career in sales and purchasing functions for automotive components at a.o. Paccar (DAF Trucks). Thereafter he moved to project purchasing and purchasing management functions at a 1st tier roof systems supplier, lastly as VP Purchasing Europe and global commodity director.

He came to TB&C in 2016 as member of the board and currently holds responsibility for new business acquisition and project execution, including strategic purchasing, as Chief Commercial Officer.

Martijn focusses on process quality and development of a global execution framework for platform projects. He has a hands-on, solution-oriented approach, while understanding the dynamics in customer organizations vis-à-vis OEM clients very well. He is highly regarded as problem solver and pragmatic decision maker by colleagues, clients and suppliers.

Martijn lives with his partner and their three children in The Netherlands. In his spare time he renovates a large old farmhouse together with his father.