Major General Justin Frederick Ellwood, DSC, AM, CSC (born 1970), commonly known as Jake Ellwood, is a retired senior officer of the Australian Army. He joined the army via the Royal Military College, Duntroon in 1989 and was commissioned into the Royal Australian Infantry Corps. He commanded the 5th Battalion, Royal Australian Regiment (2006–08), Overwatch Battle Group (West) (2007), Battle Group Tiger (2008) and the Combat Training Centre (c. 2010–13), and deployed on operations to Kosovo, East Timor, Iraq and Afghanistan. He served as Deputy Chief of Army from May to December 2018, and commanded the 1st Division from December 2018 to November 2021.