 Broadfoot scored his first goal for the "Millers" on 9 April 2016, a header in a 4–0 win against relegation rivals MK Dons.Broadfoot signed a three-year contract with Kilmarnock in July 2017.Broadfoot spent two seasons with Kilmarnock, the latter of which included a third-place finish in the Scottish Premiership, their best position for 50 years.