Heem began his senior rugby career with his home province Auckland and made 3 appearances during the 2010 ITM Cup season before heading north to Whangārei to link up with Northland Taniwha as a loan player.[1] He spent 2 seasons with the Cambridge Blues and scored 5 tries in 15 appearances before heading down to the South Island to join the Tasman Mako in 2012.[2] He firmly established himself as a regular starter for the men from Nelson during their impressive 2013 and 2014 ITM Cup campaigns and this form saw him handed a Super Rugby contract with the Chiefs ahead of the 2015 Super Rugby season.[4]
On the 18 November 2017, Heem scored a hat-trick of tries in Worcester's first win of the 2017-18 English Premiership season. The win against Northampton Saints (30-15) saw Worcester lifted from bottom of the table. A culmination of improved performances in two close losses against Harlequins, in the preceding weeks.[6]
Heem went on to play four seasons for Worcester Warriors, scoring 32 tries in 70 games.[7]
On 27 February 2019, French giants Toulon announced that they had signed Heem on a two-year deal, starting from the 2019–20 Top 14 season.[8] However, on 25 January 2021, the club granted him an early release from his contract to return to New Zealand for family reasons. He played 26 games and scored 6 tries for Toulon.[9]
He subsequently joined the Blues for the 2021 Super Rugby season.[10] He came off the bench in the Blues 41-10 win over the Chiefs in the 2024 Super Rugby Pacific Grand Final. It was the franchise's 4th Super Rugby title, and their first since 2003.
International career
Heem represented the All Blacks Sevens side from 2011 until he signed his Super Rugby contract with the Chiefs.[11] His time on the sevens circuit saw him win a silver medal at the 2014 Commonwealth Games in Glasgow.[12]