The former Bomber and Cat, joined the red and blue during the AFL's Supplemental Selection Period (SSP) in the 2020 pre-season.
Brown's opportunity with the Demons comes after an extensive career to date, which began when he was drafted to Geelong with pick No.15 in the 2008 National Draft.
The versatile tall played 15 games for the Cats after making his debut in 2011, later joining Essendon at the end of 2015.
He tallied 16 senior matches and kicked 21 goals for the Bombers in 2019, taking his count to 68 career majors.
At 196cm, Brown is set to provide a strong presence around the ground for the Demons, as he aims to become a consistent contributor for the red and blue.