Born on July 15, 1961 (Belgian).
Graduated from the University of Louvain-la-Neuve with a Bachelor’s degree in Economic Sciences and a specialisation in Business Administration and Management.
He also completed the Advanced Management Program for Suez Group Executives at the INSEAD Business School and took part in the 1998-99 Wharton International Forum, Global Leadership Series.
He began his professional career in 1983 with Deloitte Haskins & Sells in Belgium, and became M&A Consultant in the Netherlands in 1987.
In 1988, he joined the Venture Capital Department of Société Générale de Belgique as Investment Manager.
He was promoted to Controller in 1989, and in 1992 was appointed Advisor to the Director of Strategic Planning.
He became Special Projects Advisor to the President and Secretary of the Suez Board of Directors (1995-1997) and participated in the merger between Compagnie de Suez and Lyonnaise des Eaux (1997); he was later appointed the new Group's Senior Vice President in charge of Planning, Control and Accounts Management.
In 2000, Gérard Lamarche joined NALCO (American subsidiary of the Suez Group and world leader in industrial water treatment) as Director, Senior Executive Vice President and CFO.
He was appointed Senior Executive Vice President – Finance (CFO) of the Suez Group in March 2004, becoming Executive Vice President, CFO of GDF SUEZ, and member of the Management and Executive Committees of the GDF SUEZ Group in July 2008.
On April 12, 2011, Gerard Lamarche was appointed Director of the Board of Groupe Bruxelles Lambert. Since January 2012, he held the position of Managing Director.
Mr. Lamarche is currently a director of Lafarge, Legrand, TOTAL S.A. and SGS S.A.