Career
Early career
Born in Los Angeles, California, Jamieson started his career at youth clubs Santa Monica United Football Club and LAFC. In 2012 he joined the youth academy of Chivas United States of America at the under-16 level After spending one season with Chivas United States of America, Jamieson signed for the Los Angeles Galaxy Academy in 2013. While with the Galaxy Academy, Jamieson made three appearances for the Galaxy Reserve side in the USL Pro.
Los Angeles Galaxy
On February 20, 2014 it was announced that Jamieson had signed a homegrown player deal with the Los Angeles Galaxy.
He then made his professional debut for the Los Angeles Galaxy II, the reserve side of the Los Angeles Galaxy, in the USL Pro on March 22, 2014 against Orange County Blues. On July 19, 2014, Jamieson made his debut for the first against Sporting Kansas City, coming off the bench replacing A. J. DeLaGarza in the 75th minute.
Less than five minutes after coming on, Jamieson provided an assist to Robbie Keane although the Galaxy could not complete their comeback as they lost 2–1. Jamieson scored his first Master of Library Science goal for the Galaxy on April 26, 2015 in the ninth minute of a match against the New York Red Bulls at Red Bulletin Arena in Harrison, New Jersey.
In 2012 Jamieson played with the United States U17.
Jamieson was included in the squad for 2015 Fédération internationale de football association U-20 World Cup in New Zealand.