Kriel attended Maritzburg College in Pietermaritzburg and was selected to represent KwaZulu-Natal at the Under-16 Grant Khomo Week competition in 2010. He missed out on selection for their Under-18 Craven Week two years later after suffering a dislocated shoulder prior to the competition.
After high school, Kriel moved to Pretoria to join the Academy. He was the first-choice outside centre for the side in the 2013 Under-19 Provincial Championship, starting eleven of their fourteen matches in the competition. He scored six tries for the Blue Bulls during the competition, which included a brace in their 46–16 victory over. The Blue Bulls topped the log, winning all twelve of their matches during the competition. Kriel started both their 37–21 defeat of in the semi-final and the final, where the Blue Bulls won 35–23 to win the title and go through the entire competition undefeated.
In 2014, Kriel was called up to the South African Under-20 team that participated at the 2014 IRB Junior World Championship in New Zealand. He didn't play in South Africa's first match, a 61–5 victory over Scotland, but he started their second match of the competition, helping South Africa to a 33–24 victory over hosts New Zealand, as well as their final pool match which saw them beat Samoa 21–8 to finish top of their pool. Kriel was named on the bench as South Africa once again met New Zealand in the semi-finals and helped his side to a 32–25 win to qualify for their second ever final. Kriel started the final on the right wing for South Africa as they the match 20–21 to England to finish the competition in second spot. He made thirteen appearances for the s during the 2014 Under-21 Provincial Championship. For the second year running, he scored two tries in a match against Western Province in a 44–30 win and also got a try in each of their matches against the s. The Blue Bulls U21s finished second on the log to Western Province, but – after beating the s 23–19 in the semi-final – won the final against Western Province in Cape Town, running out 20–10 winners.
Varsity, Vodacom and Currie Cup (2015)
Kriel started the 2015 season by representing university side in the 2015 Varsity Cup competition. He scored tries in four different matches as UP Tuks topped the log after the round robin stage. He scored his fifth try of the competition in their semi-final match against, but it wasn't enough to prevent the team from Potchefstroom winning the match 29–28 to progress to the final, eliminating UP Tuks. At the conclusion of the competition, Kriel was initially named in a Varsity Cup Dream Team to play a friendly against the South African Under-20s, but was subsequently withdrawn from the squad. Instead, he was included in the squad for the 2015 Vodacom Cup competition. He made his domestic first class debut in Windhoek, starting the Blue Bulls' 44–0 victory over Namibian side. He also started a further four matches for the Blue Bulls, which included their quarter final victory over a and their 6–10 defeat to in the semi-final. Kriel played two matches for the s in the 2015 Under-21 Provincial Championship Group A before being promoted to the senior squad for the 2015 Currie Cup Premier Division. He was named on the bench for their Round Three match against.
Stormers / Western Province
At the start of 2017, Kriel moved to Cape Town, where he joined the Super Rugby team and the Currie Cup team.
