Ainsley Vince began her competitive career at the age of 10 under the guidance of Susan Pritchard. She was one of Canada's top equitation and hunter riders for many years, capping off her junior career with the CEF Medal and Hunt Seat Equitation Championship at the 1994 Royal Horse Show, as well as a second place finish in the prestigious AHSA Maclay Medal Final at the 1994 National Horse Show.

In 1992, Ainsley began training with Eric Lamaze and competed in the junior jumper divisions as well as the hunter ring. As a rookie, Ainsley had outstanding success with Hocus Pocus, placing consistently in World Cup qualifying competition in the summer of 1995. As a result, she was named to the Canadian Show Jumping Team Short List and was awarded the Firestone Development Scholarship.

Ainsley's top mount for over a decade was Catch 22. The pair caught everyone's attention by winning the 1999 Pan American Games Selection Trials. Shortly afterwards, Ainsley made her international debut at the 1999 Washington International Horse Show and helped Canada win its second consecutive Bank of Montreal Nations' Cup at Toronto's Royal Horse Show. The pair competed in three World Cup Finals (2000, 2003 and 2004) and, remarkably, claimed back-to-back Canadian Show Jumping Championship titles in 2001 and 2002.

Frieda and Darling are the current stars of Ainsley’s competition string. The 2013 season saw Ainsley score numerous top placings in FEI-sanctioned competition, including wins in the $50,000 Grand Prix at the CSI2* Angelstone Spring Phase II and in the $33,000 Open Welcome at the CSI2* Angelstone National Phase I.

Since 2006, Ainsley has based her training and sales business, Linden Ridge Limited, at her parents' farm in Burlington, Ontario. Her two younger sisters, Courtney and Sydney, are also successful show jumping competitors while her parents, Don and Marsie, owners of an insurance brokerage in Oakville, and have been extremely supportive of their daughters' interest in equestrian competition.