The breaststroke specialist sealed his spot in London all the way back in March when he finished a close second to Andrew Willis in the 200 metre at the British Championships, which doubled as the Olympic trials.
The 200m breaststroke field in London will be dominated by Kosuke Kitajima, the double Olympic champion with Hungary’s reigning world champion Daniel Gyurta also much fancied.
But beyond those two decorated stars the battle for a medal in London is a fairly open one and Jamieson is more than aware of that.
The 23-year-old will also compete in the 100m event in London after the withdrawal through injury of Daniel Sliwinski and insists that if he can make the final in either event, it’s anyone’s game at that point.
“Everyone is looking for that dream swim at the Olympic Games,” he said.
“In my event, there’s no clear favourite – there may be one or two guys that has got a little bit of daylight between them, but beyond that there’s going to be a real opportunity to win the medals.
“With the home crowd, there’s no way of quantifying how much of an effect it will have, but I think we all know it will be a positive one.
“The dream swim is to get that medal or looking to make a final and get a best time, but beyond that, I’d love the opportunity to race in the final because, though it’s clichéd, anything can happen and it would just be great to involved.
“I just need to get into competition mode the closer we get and get ready to race.
“It’s fantastic to be a Scot racing for Britain. I’ve had a really good couple of years at the Commonwealth Games for Scotland and now making the Olympic team.”