Dr. Klaus Lesker


Curriculum vitae Dr. Klaus Lesker

2018 – today Owner and Managing Director DIAG
03/2012 – 2018 Member of the Executive Board Ferrostaal GmbH, Essen (Germany)
07/2010 – 2018 Member of the Executive Board MPC Holding/MPC Investment GmbH, Hamburg (Germany)
06/2006 – 04/2010 (MAN) Ferrostaal AG, Essen (Germany)
Member of the Executive Board
07/2004 – 05/2006 Fresenius AG, Bad Homburg (Germany)
Pharmaplan- /Pharmatec Group, Chairman of the Board of Management
2000 – 2004 Lurgi Life Science Technologies GmbH,
Chairman of the Board of Management
1999 – 06/2004 LURGI AG, Frankfurt (Germany)
1999 Lurgi Oil Gas Chemical GmbH,
Member of the Board of Management
1990 – 1998 KRUPP UHDE GmbH, Dortmund (Germany)
1998 Vice President Sales -worldwide-
1997 Vice President of the Division “Contracting”
1995-1996 Vice President of the Division “Energy and Environment”
1993-1994 Head of Sales for the Diversion “Bleaching Chemical Plant”
1991-1992 Start up manager for Chlorine-Alkaline-Plants in Chile, South Korea and India
1990 Process engineer in the area of bleaching chemical
1988 – 1990 RWTH, Aachen (Germany)
Engineer at the Institute of Chemical-Process-Engineering
1980 – 1989 Rheinish-Westphalian Technical University Aix-la-Chapelle (RWTH Aachen), followed by degree: „Dipl.-Ing.“ (German degree approximately to M.Sc.Eng.) doctor’s degree: „Dr.-Ing.“

DIAG was a stately steamship with a prestigious name. We have transformed it into a sleek speedboat – loyal to its traditions but focused on promising sustainable projects. And always at the top of its game.


Kay-Hanns Ewaldsen


Curriculum vitae Kay-Hanns Ewaldsen

2019 – today Managing Director – Deutsche Industrieanlagen GmbH DIAG
Managing Director Ferrostaal Industrieanlagen GmbH
2018 Senior Partner Conef GmbH, Berlin
1/2014 – 12/2017 Rheinmetall International Engineering GmbH, Geisenheim
Managing director
12/2011 – 12/2013 Ferrostaal GmbH, Essen
Managing director
06/2009 – 2010 Energiewerk HEK GmbH, Osnabrück
Owner and managing director
08/2001 – 05/2009 Werner Egerland Automobillogistik, Osnabrück
12/2000 – 08/2001 Georgsmarienhütte GmbH, Osnabrück
Managing director
03/2000 – 11/2000 Reimelt GmbH, Roedermark
Member of the supervisory board
01/1998 – 02/2000 Lurgi AG, Frankfurt
Member of the executive board
Lurgi Oil Gas and Chemicals GmbH
12/1995 – 12/1997 Babcock Balcke Dürr AG, Ratingen
Member of the executive board
07/1989 – 12/1997 Wabag Wassertechnische Anlagen, Kulmbach
Managing director and CEO
10/1981 – 06/1989 Klöckner Industrieanlagen Gmbh, Duisburg
Project manager and head of Controlling international
07/1981 Master of national economics at Christian Albrechts Universität, Kiel

We have a lot of experience with large-scale, ambitious projects all over the world. Our teams have in-depth technical understanding; an eye for profitability and, last but not least, cultural competence, which is key to every project. This is what we, as an international industrial service provider, offer – nothing more but also nothing less.


Martin Wiechers


Curriculum vitae Martin Wiechers

2018 – today Managing Director – Deutsche Industrieanlagen GmbH DIAG
2011 – 2018 Director Business Strategy / Chief Compliance Officer – MPC Münchmeyer Petersen GmbH, Hamburg, Germany
2011 Compliance Consultant – WTS Group AG, Munich, Germany
2009 – 2011 Head of Project Office Compliance / Assistant to Members of the Management Board – Ferrostaal AG
2008 Assistant to CFO, Ferrostaal Australia Pty Ltd
2001 – 2004 Graduated Trainee, international wholesale and trade export, MAN Ferrostaal AG, Essen, Germany
2017 – 2018 Executive MBA, HEC Paris: Major in Leading Digital Transformation, including integral local projects with strategic international partners in Beijing, China, Silicon Valley, USA, Belo Horizonte, Brazil and Nairobi, Kenya
2004 – 2008 Diploma in Business Administration, University of Applied Science Münster, Germany / Université Claude Bernand Lyon 1, France

Everyone is talking about getting involved in digitization. Our role as an international industrial service provider is to be a leader in tomorrow’s business today. This is both our ambition and also our challenge.