After 8 years of work at Credal a Financial cooperative as credit adviser, he implemented a pilot project of the first personal micro-credit in Belgium. Then, he led The Observatoire du Crédit et de l’Endettement, specialised in consumer credit issues and over-indebtedness. From 2007 to 2018, he worked part time as researcher at Financité on Financial inclusion issues and as director of the European Financial Inclusion Network (EFIN). He joined Finance Watch in June 2018 to reinforce the Retail and Financial inclusion pole and organised the merge of EFIN network into Finance Watch.
Olivier was in charge of retail financial services and financial inclusion questions at Finance Watch until early October 2020.