He currently serves as a leader of the Belizean delegation to the International Court of Justice (ICJ) for the purpose of resolving the longstanding territorial dispute between Guatemala and Belize.
He attended St John's College in Belize City before moving to England to obtain a law degree from Hull University.
Returning to Belize after completing his law degree, Shoman participated in a protest against the Vietnam War film The Green Berets, starring John Wayne on New Year's Day 1969.
The group who planned the protest, the Ad Hoc Committee for the Truth About Vietnam, included other radical Belizeans such as Evan X Hyde and future Prime Minister Said Musa.
He worked closely with leader George Price through the 1970s to lobby key international actors with the goal of achieving Belizean independence.