Paul O'Sullivan is a Hong Kong horse trainer. The New Zealander was champion trainer in his homeland on 11 occasions, in partnership with his father Dave for 17 years. O'Sullivan first came onto the global scene in 1989 when he won the Japan Cup with Horlicks, ridden by his brother Lance, while he added the 1991 Cox Plate with Surfers Paradise. He first arrived in Hong Kong to train in 2004, having a career best season in 2015-16 and striking success with the likes of Vital King, Fellowship and Aerovelocity.