[1] As a men's fours bowler, he and his teammates won gold in the 1978 Edmonton Commonwealth Games, and 1980 Melbourne World Outdoor Championships.

He coached Hong Kong's national team, including for the 1970 and 1978 Asian Games, both in Bangkok.

[3][4] Dallah won a gold medal in the fours as skip (captain) at both the 1978 Commonwealth Games in Edmonton (with Philip Chok, M. B. Hassan Jr., and Roberto da Silva), and the 1980 World Outdoor Bowls Championship in Melbourne[5] (with Hassan Jr., George Souza Jr., and Eric Liddell).

[6] Other representative bowls appearances included the Commonwealth Games in 1974 (Christchurch), and 1982 (Brisbane); the World Bowls Championships in 1976 (Johannesburg) and 1980 (Frankston); the Mazda Jack High International Invitation Singles 1981 in Victoria, Australia; the Rest Of The World Team tour of the British Isles in 1980; the Kodak Masters Invitation UK in 1981; and the Sydney International Masters Invitation in 1983.

He also played a major role in the establishment of the O. R. Sadick Islamic Centre located at Wan Chai.