Geoff Warburton is a Canadian multi-platinum songwriter best known for his work with Shawn Mendes. Warburton has co-written three songs on Mendes' debut album Handwritten which debuted at number 1 on the U.S. Billboard 200. He also co-wrote nine songs on Mendes' second album, Illuminate, including “There’s Nothing Holdin' Me Back”, which reached number 1 on the U.S. Mainstream Top 40 chart and in additional countries worldwide.