And the Glasgow golfer's coach insists the sky is the limit for the in-form Cathkin Braes ace.
Jamieson bagged his maiden Euro Tour title last Sunday with a play-off victory in the rain-shortened Nelson Mandela Championship at Royal Durban.
And Bothwell Castle pro Alan McCloskey, who has been the former amateur star's coach for over five years, reckons there is plenty more to come.
He said: "In the very last conversation I had with him last week before he left, he said he felt he was at a point where he was ready to win and he was going to South Africa to do that.
"He's now got that win and a two-year exemption, which takes the pressure off, but he'll not rest on his laurels.
"He's worked very hard on his game, and the last four years he has been successful at different levels. He's moving in the right direction and he will want to kick on from that win on Sunday.
"There are bigger and better things to come from him, I'm sure of that."
Jamieson will be eager to keep the momentum rolling along at Leopard Creek this week in a field that includes the 2010 Open champ Louis Oosthuizen and former Masters winner Charl Schwartzel.
The 29-year-old, who fired a sizzling 57 in the final round on Sunday to push himself to the front, said: "I've made nice steady progress over the last four years.
"This is my third season on The European Tour, so to get off to a winning start is fantastic."
Jamieson is joined in the line-up by Glasgow's two-time Tour champion Marc Warren, who shared 21st in the season-opener last weekend.
Clydebank's Scott Henry makes his second appearance on the main circuit following his promotion from the second-tier Challenge Tour.