About us

BTC has a holistic, industry-oriented IT consulting offering and thus a leading position in the fields of energy, telecommunications, public sector, industry and services. The offer includes consulting, system integration as well as application and system management. Another focus is on energy-related software products.

On this page we would like to introduce our management board.

Our corporate governance

Dr. Jörg Ritter

After graduating in computer science, Dr. Jörg Ritter worked for several years as a software engineer and division manager at IDS Prof. Scheer in Saarbrücken. He then worked as a research assistant at the Oldenburg computer science institute OFFIS. In 2000, he completed his doctorate in computer science at the University of Oldenburg.

After co-founding and developing the start-up OSC-IM Systems AG, which was acquired by BTC Business Technology Consulting AG in 2004, he joined the BTC Management Board in 2005. As Chairman of the Management Board, he is now responsible for corporate and business development as well as marketing and sales for the BTC Group.

Dr. Ritter is also involved in the IBS IT & Business School in an honorary capacity as Deputy Chairman of the Board and as 1st Chairman in the development of the regional IT network TECI_OL.

Percy Hamer

Percy Hamer was born in Bremen in 1969 and completed his degree in computer science in 1993 at the University of Bremen. He started his professional career at Stadtwerke Bremen AG as a project manager for new technologies and strategies. In 1998 he switched to CA Computer Associates, where he established the IT Consulting division for Germany and Austria. For CTS Eventim AG from 2003 he was responsible for IT services in the customer business as well as for the FIFA Football World Cup 2006. From 2006 he took over responsibility for IT infrastructure services and established the global cooperation at Logica Germany. As CIO Europe and General Manager at Konica Minolta, he consolidated IT on a European level from 2013. As BTC board member, Percy Hamer has been responsible for operational business and central functions since 2020.

Supervisory board

Dr. Frank Reiners - Chairman of the Supervisory Board

Dr. Frank Reiners has been a member of the Executive Board of EWE AG since October 1, 2024.

Dr. Frank Reiners was previously Chief Financial Officer and member of the management board of Open Grid Europe GmbH (Essen), where he had worked since February 2018. Before that, he held various management positions, including Senior Vice President Controlling at Uniper SE (Düsseldorf) and various management positions at E.ON SE (including in Düsseldorf and the Netherlands) and Deutsche Telekom AG (Bonn).

Born in Nuremberg in 1968, Dr. Frank Reiners holds a diploma in business administration from the University of Erlangen-Nuremberg and received his doctorate there in 1999.

Dr. Christian Pundt - Deputy Chairman of the Supervisory Board

Dr. Pundt (*1973) is the main administrative officer and district administrator of Oldenburg. Other activities include a member of the board of directors of the LZO, board member of a non-profit company (Gemeinnützige Werkstätten) in Oldenburg, board member of the Oldenburg East Frisian Water Association and chairman of the municipal supply fund in Oldenburg.
Before that, Dr. Pundt worked as mayor of the municipality of Hatten and district chairman of the Lower Saxony Association of Towns and Municipalities. Dr. Pundt lives with his family in Sandhatten. District Administrator Pundt is particularly committed to the topics of digitization, sustainability and climate protection.

Detlef Roß

Mr. Detlef Roß (*1959) is an electrician and owner of the "Licht Kontor", a specialized company for lighting, building system technology, electrical installation and security technology. He lives in Delmenhorst and is the chairman of the Delmenhorst South branch of the SPD.

Mr. Roß has been a member of the Delmenhorst City Council since 2006. On the Council, his current roles are Vice-Member of the Management Committee, Vice-Chairman of the Planning Committee and Chairperson of the Environment Committee.

In 2011, Mr. Roß was elected chairman of the Delmenhorst Fishing Club with around 1,000 members.

Assunta Hamm

Assunta Hamm (*1965) has a degree in business administration and has been employed as a management consultant at BTC AG since 2007. After completing her education, she worked in various companies, most recently for 9 years as a SAP consultant and department head at Schüco International in Bielefeld. Ms Hamm is a company works council member of BTC AG, a member of the Munster site works council and is also active in various works council committees.

Thomas Walter

Thomas Walter (*1965) has a degree in economics and was an employee and managing director of a trading company from 1995 to 1998. In 1998 he started working as an SAP consultant. Since 2000, Mr Walter has been employed at BTC AG as a consultant in various fields of activity. After holding the position of Deputy Chairman of the Works Council since 2004, he was elected Chairman of the Works Council in 2013. In 2014, he was also elected Chairman of the Group Works Council.

Ingo Schwarz

Ingo Schwarz is a retired police officer.

Holger Heymann

Holger Heymann is district administrator in the district of Wittmund. He is member of the Supervisory Board since 29.07.2024.

Marco Prietz

Marco Prietz is district administrator in the district of Rotenburg/Wümme. He is member of the Supervisory Board since 29.07.2024.

Kristof Ogonovski

Kristof Ogonovski is member of the Supervisory Board since 29.07.2024.

Michael Ospalski

Michael Ospalski is member of the Supervisory Board since 29.07.2024.