First employed by a mining company in the mountains of Nimba (Liberia), he returned to the U.S. where, in 1965, at Cornell Medical Center, he supervised a team in synthesizing metabolic steroids.
In the following years, as Beauvoir built up his reputation to the public, he deepened his knowledge of the religion by visiting and paying hommage to other branches of Vodou around the Haitian countryside.
When he was contacted by the National Palace for consultation, he responded by founding the Bòde Nasyonal in December 1985, the first reunion of important Houngan leaders of all the branches of Vodou to urge the Duvaliers to do more to meet the needs of the poor.
This advice turned out to be too late to stop the fall of the regime, but this first organization, the Bòde Nasyonal, was essential later in 1986 to counter the effects of the post-Duvalier dechoukaj violence.
Initially targeting the Tonton Macoutes paramilitary which had been used by the Duvalier regime to oppress the Haitian people, the violent crowds, at times manipulated by Christian churches or by profiteers, turned against Vodou practitioners and their temples.