He was elected as the chairman of the university's Conservative Association in 1990.
From 1954 to 1955, he was chairman of the National Governor's Association.
He is a former chairman of the National Governors' Association.
He also served as chairman of the Lawyers' Association.
He is to become chairman of the National Governors Association this summer.
He is in line to become chairman of the Republican Governors' Association this year.
In the 2007-2008 term, he served as chairman of the National Governors Association.
In 1985, he was elected as the chairman of the Chinese Musicians' Association.
Carroll served as chairman of the National Governors Association in 1978.
He has been both chairman and secretary of the Professional Cricketers' Association.