He became executive director of the Oceania National Olympic Committees in 1997, and was president of the Oceania Swimming Association since 2008. Miller was also a member of the FINA technical open water swimming committee in 1997, serving for over 10 years, before joining the FINA Bureau, where he has been liaison for open water swimming.
He was also a member of the FINA Executive when he died. "We are very saddened with this terrible news," FINA president Julio Maglione said. "Dennis was a brilliant administrator and a great promoter of the aquatic sports. He played a very important role in the inclusion of open water swimming in the Olympic program, starting at the 2008 Games in Beijing. His valuable contribution within the Bureau and the executive was of paramount importance for the successful development of our activities."
FINA said Miller is survived by his wife and three children.
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