He is perhaps most well known for his work with former Dire Straits front man Mark Knopfler. Worf has contributed double and electric bass parts to every Knopfler solo album and is a member of his touring band.[4] He also contributed to the BBC documentary on Knopfler, Mark Knopfler: a Life in Songs, shown on BBC 4 on 28 January 2011.[5]
In addition to his studio work, Worf performs regularly in and around Nashville with artists such as Mike Henderson and Kevin Welch.