At the end of his education, Boni began a long career in banking. From 1975 until 1979 he worked at the Benin Commercial Bank before moving to work at the Central Bank of West African States (BCEAO) from 1977 until 1989. From 1992 until 1994, he served as an economic adviser to the President of Benin Nicéphore Soglo. In 1994 he left this position to become the President of the West African Development Bank (BOAD).
