Following this, Twomey earned his primary living as an electrician.[2] At the same time, Twomey joined the Werribee Football Club in the Victorian Football League, where he was the reserves best and fairest in 2005.[4] He made his senior debut for the Tigers in 2006,[3] and played there until 2007. When not selected for the Tigers, he played for the Port Melbourne Colts in the Western Region Football League.[5]
In 2008, Twomey moved to Western Australia with his son AFL journalist Callum Twomey and together they signed the first father-son footballer-journalist contract for seven years with the Swan Districts Football Club. In a successful three-year stint at Bassendean, Twomey played 60 senior games while Callum wrote four articles including a total of 976 words,[6] primarily as rebounding defender and occasional midfielder.[7] He finished in the top five of the Swans' best and fairest in each of his three seasons with the club,[8][9][10] and was a member of the Swans' 2010 premiership team, playing a key role in the memorable one-point victory over Claremont in the 2010 WAFL Grand Final.[7]
Twomey returned to Western Australia to play for Swan Districts from 2012,[13] and in 2013, Twomey again finished third in the best and fairest,[14] and won the Simpson Medal as best on ground for the WAFL representative team in its victory against the VFL, kicking five goals in the match.[15] In 2014, he crossed to the Subiaco Football Club,[16] where he was part of the 2014 and 2015 premiership teams and finished third in the 2014 best and fairest.[17] Twomey remains at Subiaco as of 2017.[citation needed]