"We are really rapt that Luke and Tiaan will be joining us for the next few years. These are two exceptional signings for the club which secures the future of the Chiefs. I'm pretty excited to work with both these young men who are quality players with huge potential," incoming Gallagher Chiefs head coach Colin Cooper said.
"It has always been a dream of mine to be a Chief," Jacobson said.
"I had a small taste of it this year, being a part of the Chiefs team to play in the Global Brisbane 10s tournament and also attending some trainings throughout the year and I enjoyed every minute of it. I'm really excited to be a part of the team."
Born in Te Awamutu and raised in Cambridge, Jacobson, attended Cambridge High School, earning selection for the New Zealand Schools team in 2014. In 2016 he captained the Waikato U19s in the Jock Hobbs Memorial National U19s Tournament, leading his team to Graham Mourie Cup victory and being awarded Player of the Tournament in the process.
Jacobson has experienced the Chiefs development pathways firsthand, having played for the Chiefs U20s team and the University of Waikato Taua Development team, with the latter captained by his older brother Mitch. This year he received the Chiefs Under 20s Player of the Year award.