 In 1983 Jamieson also became the co-founder and first head coach of what was to become the Iroquois National Team, a team composed of Native American players.As coach he took the team to the 1984 World Lacrosse Games in Los Angeles and to England to play the English national team.He later served as Executive Director of Iroquois National Lacrosse and is an Emeritus member of that organization's Board of Directors.