After a meteoric career at TBWA, André Duval came to head the agency at a young age. In 1996, together with Guillaume Van der Stighelen, he started his own advertising agency, Duval Guillaume. Built into the largest and leading advertising agency in Belgium, it was put on the international map. Duval Guillaume was sold to Publicis, and Duval founded a new venture, Duval Union.
Initially conceived as an investment vehicle, today Duval Union has grown to be a fully fledged marketing and communication collective.