Management Board

Dr.-Ing. Wolf-Dieter Longrée
The graduated civil engineer Dr. Wolf-Dieter Longrée worked for 11 years for the Ingenieurgemeinschaft Meerestechnik + Seebau (IMS) in Hamburg before he co-founded IMPaC Offshore Engineering GmbH in 1983. With a vision of providing comprehensive engineering and consultancy services to the oil & gas industry Dr. Longrée built the business from a 2 person company to an international operating company with worldwide established subsidiaries.
Together with the Managing Director Technical and the Managing Director Financial as CEO he is responsible for the strategic orientation of the company and runs the operational side of the business.

Stephan Walther-Longrée
Born in Basel, Switzerland Stephan Walther-Longrée holds the position of the Managing Director Financial of IMPaC Offshore Engineering GmbH. After his admission to the Bar, Stephan Walther-Longrée has worked for the STG-Coopers & Lybrand AG and Schweizerische Treuhandgesellschaft (STG) in Zurich from 1993 – 2003 before he joined the IMPaC Group as MD Financial in 2004.
He is responsible for the Financial and Administration Division as well as the International Division and IMPaC's Nigerian subsidiary in order to head the established network of our affiliates.

Tilman Schiegl
As of 1 January 2008 Tilman Schiegl was appointed to the newly created position of the Managing Director Technical. As third executive of IMPaC Offshore Engineering GmbH, Tilman Schiegl is responsible for the operative business and the overall project management including projects & engineering, procurement and marketing & sales. Born in Dachau, Bavaria Tilman Schiegl a graduated petroleum and mining engineer can fall back on extensive technical know-how and worldwide project experience in the oil and gas industry.
Starting in 1994 as a junior engineer for the Preussag Energie GmbH he became a drilling manager and expert, before he joined IMPaC in 2003 managing major projects.

Denis Bone
In 2010, Denis Bone took over the duties of Managing Director for IMPaC Oil & Gas Engineering Ltd., Nigeria. He has worked as a Chief Engineer and Project Coordinator for major oil & gas projects for Shell in Nigeria for almost a decade before he took on the new challenge with IMPaC. Denis Bone has worked for a number of different Engineering, Construction and Consulting companies in the UK, Iran, France, Germany, Portugal, Cuba, Qatar, USA and Malaysia and has gained comprehensive experience in the management of a variety of onshore and offshore projects worldwide. As the interface Manager for the Afam Project including the Okoloma Gas Plant and Pipeline Project, Denis Bone worked closely with IMPaC, managing the detail design, procurement and logistics effort at IMPaC's Hamburg offices and also as Project Manager On-site in Nigeria, from 2006 to 2010.