New Zealand's flagbearer at the opening ceremony of the 1988 Summer Olympics, he went on to win another gold medal and a silver medal at that Olympic Games in Seoul, Korea. He was the first New Zealander to compete in five Olympic Games and his four gold medals is still the New Zealand record for an individual haul at the Games.
In 1990 Ferguson started a kayak retail and hire business named Ferg's Kayaks.
Ferguson also starred in the NZ TV show Clash of the Codes, having been in the winning team on two occasions.
As of 2009[update] Ferguson is fronting the campaign to build an international whitewater canoeing stadium in Manukau City. Ferguson and his sons would run the facility.