The 268 gamer will join the club next season, and is no stranger to the league, having coached Sunshine previously.
Scotland has also previously been in a development role with VFL side Port Melbourne.
"The Deer Park Football Club is thrilled to announce the appointment of Heath Scotland as its Senior Coach for the 2023 season," the club said in a social media post on Thursday night.
The Lions currently sit fourth on the Division 1 ladder with three games remaining in the season, and are home to former Kangaroos and Magpies hard-nut Levi Greenwood.
They'll be looking to beat St Albans this weekend to retain a top four spot, as they look to clinch an eighth straight WRFL premiership.