Joining the club in 1890, he went on to make 293 appearances for the club, playing in the 1894 FA Cup Final. When Frank Brettell left the club, Somerville was made secretary-player, on retirement becoming secretary-manager and eventually becoming the club's first full-time manager in 1908. Under Somerville, the club were promoted to the First Division on three separate occasions and relegated four times. During the season that Bolton were relegated the fourth time, Somerville stepped down, being replaced by Will Settle. He remained as secretary for the rest of the season before leaving the club. He later became a Football League linesman.