Martijn Peters

Martijn has 20 years of experience in M&A and strategy consulting. Before founding DEX in January 2015, Martijn was partner and vice-president at international consultancy firm Solving Efeso (now Efeso Consulting), where he was head of the international M&A practice. Martijn started his international career with Sara Lee in the Netherlands and Brazil. He studied business administration at the University of Groningen, marketing at UCLA in Los Angeles, financial management at the University of Amsterdam and completed executive courses at Harvard Business School in Boston and Kellogg Business School in Chicago. Martijn has a broad experience as an international deal maker and is the president of Globalscope.

Koen Andeweg

Koen is a seasoned advisor and deal maker with international experience in various industries including software, ICT, business services, manufacturing and pharma.

Prior to joining DEX international M&A in 2015, Koen was Corporate Finance & Strategy Consultant at Efeso Consulting and business development manager at EY. Koen started his career in Investor Relations at the Siemens Corporate Headquarters in Munich. He studied business administration at the Erasmus University in Rotterdam and the San Francisco State University and completed executive education courses at Kellogg Business School in Chicago.

Floris de Klerk

As a passionate sailor, Floris started his professional career at Nautor’s Swan Benelux. He gained experience from a wide range of assignments including management of international yacht racing campaigns and facilitating international transactions of sailing yachts. Joining DEX in 2017, Floris adapted his years of specialized client relationships to the M&A industry, using the same qualities to deliver for his clients today.

Floris studied Business Engineering in Amsterdam and Management at Nijenrode Business University, including course at Universidad de Los Andes in Bogota, Colombia.

Mark Klein Haneveld

Mark joined the DEX team in 2017 and has since worked on assignments in a wide range of industries. He has a Master’s degree in Finance from Tilburg University. During his Bachelor’s program, Mark studied abroad gaining international experience at the Chinese University of Hong Kong.

Mark began his career with DEX as an analyst and is currently manager M&A.

Wencke Willemze

Wencke joined DEX as our office manager, bringing with her the experience she gained in the professional services industry with firms such as Interpolis, De Hypotheker, and Audax.

Wencke specialized in Linguistics and Artificial Intelligence while she studied Communication/Information Sciences at Tilburg University. She also completed a study in Graphic Design.

Guido Peeters

Guido works at DEX since 2024. Prior to this, Guido completed the CFA level 1, Msc. Finance, Msc. Strategic Management and the Bsc. Business Economics, for which he studied for a semester in Rome at the Luiss Guido Carli business school.

Guido started at DEX international M&A as an analyst and has returned, after traveling the world, as M&A consultant.

Julius Buwalda

Julius was born and raised in Johannesburg, South Africa, and moved to the Netherlands to complete the International Baccalaureate in Oegstgeest. He gained professional experience as an analyst at Aegon Asset Management and Auxilium Capital Private Equity before joining DEX international M&A in April 2025.

He holds an MSc. in Financial Economics from Erasmus University Rotterdam, and is currently pursuing a second BSc. in Philosophy from the same university to complement his first in Economics and Business Economics.

Mike Heerkens

Mike joined DEX as an analyst in April 2025. He holds a Bachelor’s degree in International Business from Tilburg University, where he also completed a Master’s in Finance. As part of his academic journey, he participated in an international exchange program at the University of Zagreb.

Prior to joining DEX, Mike worked as a personal assistant to the management at Team Rockstars IT. In addition to his professional activities, he is actively involved in a foundation dedicated to supporting young people coping with grief.