Marnix Galle*

Chief Executive Officer and Executive Chair
Chair of the Nomination Committee
Chair of the Executive Committee
Chair of the Investment Committee

* Mandate executed by the company A³ Management BV, represented by Marnix Galle.

After studying economics at Tulane University in New Orleans, Louisiana, USA, Marnix began his professional career in 1987 at Cegos Belgium as a consultant. In 1989, he took his first steps in the real estate sector (family portfolio). His own company Allfin (°2001) became one of the leading real estate developers in Belgium. In 2014, Allfin Group took a 29% stake in Immobel, listed on Euronext since 1863. Following the merger between Allfin Group and Immobel in 2016, he became its Executive Chair and has been chairing Urban Land Institute (ULI) Europe since July 1st, 2020. He also is a director, member and trustee of several leading European and American associations.


Adel Yahia*

Senior Managing Director Belgium and Luxembourg
Member of the Executive Committee

* Mandate executed by the company Adel Yahia Consult BV, represented by Adel Yahia.

Adel YAHIA (44) joined Immobel in December 2017 as Chief Operating Officer responsible for the Development, Technical, Sales and Landbanking departments. Prior to that, he worked at AG Real Estate as head of the Residential department and co-Head of
Development. Between 2010 and 2015, he was responsible for various business units at Matexi. He started his career in 2004 as a real estate developer and also worked in real estate investment banking. After studying law at the KU Leuven and holding a Master’s degree in General Management (MGM) from Vlerick Business School, he graduated in 2006 with a Master’s degree in Real Estate (postgraduate programme in Real Estate Studies) at the KU Leuven. In 2014, he completed the “Executive Program in Real Estate” training at Solvay Business School (ULB). He is a lecturer at KU Leuven, Solvay Business School and at Saint-Louis in different real estate related programmes.


Karel Breda*

Chief Financial Officer
Member of the Executive Committee

* Mandate executed by the company KB Financial Services BV, represented by Karel Breda.

Karel BREDA (47). After studying Applied Economics at the KU Leuven and obtaining an MBA from the University of Chicago, Booth School of Business, Karel began his professional career in 1999 by developing a number of internet start-ups in Europe. In 2002, he joined GDF Suez (now Engie), where he held various managerial positions in M&A and Project Finance in Europe, South Asia, the Middle East and Africa. In 2011, he was promoted to Chief Financial Officer for the South Asia, Middle East and Africa region based in Dubai and in 2014 for Engie E&P in the Netherlands. Prior to joining Immobel on 1 August 2018, Karel was Managing Director Middle East, South and Central Asia and Turkey for Engie Solar based in Dubai and India.


Stephanie De Wilde*

Chief Legal Officer
Member of the Executive Committee

*as permanent representative of L.A.W. BV.

Stephanie DE WILDE (40), holds a Master in Law from Ghent University, a Master after Master in Company Law (UGent) and a Master in Real Estate (KU Leuven). She started her professional career as an attorney for Corporate and M&A and gained experience at several law firms, including Monard Law and EY LAW, and in-house experience as Corporate Legal Counsel at Lotus Bakeries. In 2016, Stephanie joined Immobel Group as Senior Legal Counsel and later Head of Legal (2020) before being promoted as Chief Legal Officer and
Compliance Officer in 2022.

Olivier T.

Olivier Thiel*

Senior Managing Director of France, Germany, Poland and Spain and Head of Development Belgium
Member of the Executive Committee
Member of the Investment Committee

*as permanent representative of SRL Queen-K.

Olivier THIEL (40). After studying Construction and Real Estate Management at the Hogeschool Antwerpen, he started his career in real estate brokerage in 2006 before joining the capital markets
team of Knight Frank Brussels in 2010. In 2013 he joined Alides REIM as development director, managing their major mixed-use urban projects. He joined the Immobel Group in 2016 as Development Director of Immobel Belgium until 2020 and is currently Managing Director of Immobel Poland (2019) and Head of Development Belgium (2020). As of 2023, he also is in charge of Germany, France and Spain. 

Supporting activities


Alfred Galle*

Co-Head of Development Belgium

*as permanent representative of AG Investment Management bv

Judith V.

Judith Verhoeven*

Head of Corporate Social Responsibility Immobel Group

*as permanent representative of ESG Lab