From 1995 to 1999, he studied at the École supérieure des affaires de Grenoble (ESA) where he obtained a master's degree in Finance.

[2][3][4] He was promoted partner of the firm in 2012, at the age of 36, thanks to his expertise, his network, his multicultural profile and his knowledge of the American and French systems.

As Director of Professional Practice on the African continent, Romuald Wadagni ensured that international standards were applied by the entire Deloitte network in Francophone Africa.

[7] In 2016, he has 17 years of expertise in French (Paris and Lyon), American (Boston and New York) and African (Lubumbashi) firms of Deloitte.

[14] In July 2021, Benin will carry out a major operation by becoming the first African country to issue a Eurobond dedicated to the financing of projects with a high impact on the achievement of the United Nations Sustainable Development Goals, for an amount of 328 billion CFA francs (500 million euros) and an interest rate of 4.9%.

This operation follows several months of work by Romuald Wadagni and his team, and trips to meet investors in Asia, Europe and America.

With this operation, Benin saved more than 36 billion CFA francs (about 55 million euros) in non-accrued interest, which were directly injected into various social impact projects.

Following this operation, the magazine Jeune Afrique published an article entitled "How Romuald Wadagni made Cotonou save 55 million euros".

In 2020, Benin became the country in the world where it was easier and quicker to start a business according to the United Nations Conference on Trade and Development (UNCTAD).

[19] In 2022, in the context of the economic crisis following the COVID-19 pandemic and the Russian-Ukrainian war, Wadagni took measures to preserve the purchasing power of Beninese.