Our partners

We help you to transform your business.

Markus Hesse

Managing Partner

Markus Hesse is co-founder and Managing Partner at CoThink Germany GmbH. He combines experience as consultant and coach on international projects in a variety of industries for Fortune 500 and mid-sized companies with experience in executive management of international organizations. His core competencies are agile strategies, transformative change programmes and project management. He is member of the executive management at CoThink Germany and Direct Impact Group. Markus educational background includes an M.A. in Business Coaching and Change Management. He is author for the Euro-FH (Hamburg) on change management in CSOs.

Michael Clauß


Michael is co-founder and partner of CoThink Deutschland GmbH with more than 15 years of experience in skill development and operational improvement. His responsibilities include design, development and optimisation of processes across the corporate sector. He is actively working as a consultant in all aspects of rational thinking processes, strategy and project management. Michael has a high emphasis on process improvement and troubleshooting, particularly in the manufacturing industry. As a former employee of Siemens, he has been familiar with these processes since 1990 and has worked as a consultant on a number of projects around the globe. Due to his industrial experience, combined with the different toolboxes and processes, he is able to create measurable results for nearly all branches of business.

Jan Willem Vernhout


Jan Willem Vernhout (1969) co-founded the CoThink Group in 2008. Today he is managing partner of CoThink bv in the Netherlands and partner of CoThink Germany GmbH. The focus of his work is the optimization of processes in manufacturing and IT. Jan Willem started his career at a major electricity producer. He then worked as a consultant at Datastream Systems Inc., before he worked as a Senior Consultant for Operational Excellence at Kepner-Tregoe (KT). Since 2008, Jan Willem works for CoThink with clients in different sectors to improve earnings by consistently applying rational thought processes.

Ron Vonk


Ron Vonk is also co-founder, partner and senior consultant at CoThink. With more than 18 years of experience as a consultant and trainer with a particular focus on industrial and IT companies. By training and the practice in the application of the (rational) methods, he helps organisations to improve their performance. After his military service, Ron began his career as a consultant at Rijnconsult. He worked as a consultant for 5 years he was involved in consulting, coaching and training in the field of maintenance management in mainly technical and production departments of large industrial companies. In the following 8 years, Ron worked in various roles for the international consulting firm Kepner-Tregoe (KT). Ron is an author and speaker at public events on process optimization and application of rational thought processes.

Our Team

A Powerful team for your success

Like any consulting company, CoThink lives by the people who work for us. We focus exclusively on highly qualified and experienced senior management professionals. Our employees are our most valuable assets. With their potential and diversity, they make the CoThink network distinctive. The interdisciplinary and complementary composition of the team allows different perspectives for our clients’ challenges.

Within the international CoThink network, we offer services in German, English, Dutch, French, Arabic, Hindi and Spanish. Every employee has both special competencies in which she or he acts as a specialist within the team, as well as a broad knowledge on critical thinking processes and effective management approaches. All employees are united by our sustainable and practical approach to consulting.

Our Offices

Present in Germany - linked across in Europe

The CoThink with offices in the Netherlands, France, Germany and the United Kingdom.



CoThink Deutschland GmbH
Wilhelmstraße 53, 64646
+49 (0) 6252 9659281


CoThink bv
Postbus 280, 3850 AG ERMELO
+31 341 493 534

United Kingdom

CoThink UK Ltd
27 Old Gloucester Street,
London WC1N 3AX
+44 20 7419 5967


CoThink France SAS
28 rue Reisseissen,
67000 Strasbourg
+33 7 61 93 94 69

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