Tony McGuinness plays guitar with English indie band Sad Lovers & Giants,[2] appearing on three albums between 1988 and 2002 and is still an active member having toured US and Europe regularly with them since 2009.

McGuinness was an advertising executive working for Bosse, Massimi & Podia (BMP) until, in 1989, he joined the Warner Music Group as a marketing specialist.

McGuinness and his brother Liam teamed up to create electronic dance music under the alias Nitromethane in the early 2000s.

[6] Above & Beyond's second studio album, Group Therapy, features McGuinness' first ever vocal single (with Richard Bedford) on the track "Black Room Boy".

[8] In 2024 McGuinness released the solo rock album Salt, which he had written 30 years previously in the 1990s.