Retiring from basketball after winning the 1992 NBL Championship with the South East Melbourne Magic, Lemanis turned his hand to coaching, earning his stripes as an assistant coach.
After a one season stay at the Geelong Supercats, Lemanis relocated to North Queensland, serving as an Assistant Coach to Ian Stacker at the Townsville Crocodiles between 1998 and 2005, helping the team reach their first NBL Grand Final in 2001.
After serving his apprenticeship, Lemanis got the opportunity to build his own head coaching career, taking out the role at the New Zealand Breakers in 2005. It was here that Lemanis would build a program that would be the envy of the competition.
Lemanis led the club to their first NBL Championship in 2011, repeating the success in 2012 and 2013 – becoming just the second coach after the legendary Brian Goorjian to win three consecutive NBL titles.
During this time, Lemanis won two Lindsay Gaze Trophies for NBL Coach of the Year in 2011 and 2013.
These efforts in the NBL didn’t go unnoticed on the international scene, with then Australian Boomers Head Coach Brett Brown inviting Lemanis to join the program as an Assistant Coach in 2009.
Lemanis served alongside Brown at the 2010 FIBA World Championships and 2012 London Olympic Games, taking charge of the team for the 2012 home series against China in Brown’s absence.
In April 2013 Lemanis was appointed Head Coach of the Australian Boomers, leading the team to series win at the Sino-Australia Challenge over China. This was the start of a busy period for the new boss, leading the Emerging Boomers to their first ever medal at the 2013 World University Games in Russia.
Lemanis ensured the Boomers would have top billing in the region, leading the team to the 2013 and 2015 FIBA Oceania Championship over New Zealand before leading the team into the Rio Olympics in 2016.
The Boomers narrowly missed out on winning a Bronze medal at the tournament, but Lemanis' team proved that they will be a force in world basketball for years to come.
Following the Olympics, Lemanis' took the job as coach of the re-vamped Brisbane Bullets. After an eight year hiatus, the Bullets returned in 2016 with Lemanis at the helm. Now holding two coaching roles, Lemanis balances his duties between being both the national team coach and the coach of an NBL side.
1996 – Geelong Supercats Assistant Coach (NBL)
1998-2005 – Townsville Crocodiles Assistant Coach (NBL)
2004 – Australian U21 Men’s Team Assistant Coach
2005-2013 – New Zealand Breakers Head Coach (NBL)
2009-2012 – Australian Boomers Assistant Coach
2013-Current – Australian Boomers Head Coach
2016-current - Brisbane Bullets Head Coach
Olympic Games: 2012 (Assistant Coach)
FIBA World Championships: 2010 (Assistant Coach)
FIBA Oceania Championships: 2011 (Assistant Coach), 2013 (Head Coach), 2015 (Head Coach)
World University Games: 2013 (Silver – Head Coach)
NBL Championships: 1992 (player), 2011, 2012, 2013
NBL Coach of the Year: 2012, 2013