Aquis Farm announced on Tuesday that Victorian Group 1-winning jockey Michael Walker has become their retained rider.

Aquis chief executive Shane McGrath confirmed the news saying the arrangement firms up the relationship Walker has with the majority of the trainers who prepare Aquis-owned horses.

"Michael is based in Melbourne and all our Melbourne trainers use Michael anyway, from David Hayes, Ciaron Maher to Mick Price, so we were just looking for a jockey we can align with and he was a logical choice being a Group 1 jockey," McGrath said.

"We've had a good relationship so far with him."

McGrath said the deal did not mean Walker would ride exclusively for the Aquis group, which is owned by the Hong Kong-based Fung family.

"He has his agent still on board and he is still able to take outside rides," McGrath explained. "It will be a practical relationship too. We won't tie him to an outsider with little chance if he can ride a fancied horse in a good race for example."

Walker has in the past ridden extensively for prominent owner Sir Owen Glenn winning at Group 1 level with runners such as Comin' Through. 

Michael Walker winning on Comin' Through, picture Sportpix.com.au