Rik Simpson (aka Rikademus) is a British record producer, sound engineer, musician, and songwriter. He is most recently recognised for his production work with Coldplay on Viva la Vida or Death and All His Friends (2008), Mylo Xyloto (2011) and Ghost Stories (2014). He has also gained critical acclaim for his work with Jay-Z, Portishead, Kasabian, Black Rebel Motorcycle Club and PJ Harvey.