Lachlan McGinness has performed in more than a dozen Canberra Amateur theatre productions including Les Miserable (twice), Jesus Christ Superstar (twice), Me and My Girl, the Sound of Music (as Rolfe), Annie (Bert Healy), the Mikado (Nanki-Poo), High School Musical (Zeke), Beauty and the Beast (as the Beast), Cats, Spamalot, the Music Man, and Fiddler on the Roof.

Lachlan also performs shows at Questacon, Australia's National Science and Technology Centre, including the Space show, the Colour and Light show, 'Balloonatic' and 'Instrumental as anything'.