Henry has served as an associate member of the French Society of Neurosurgery since 1984, a member of the National Committee to Evaluate Polio Eradication in Haiti since it was created in March 1990, and head of the neurosurgery department of the Bernard Mevs Hospital since October 2014. He led the public health response in the aftermath of the 2010 Haiti earthquake and to the cholera outbreak in 2012. On 26 March 2020, the President of Haiti Jovenel Moïse chose him as a member of the 17-member scientific council tasked to fight the COVID-19 pandemic in the country.