In 2018, the Hutchison brothers formed the supergroup Mastersystem with James and Justin Lockey, releasing a studio album, Dance Music (2018).

Reflecting upon his mother's nickname for Scott, "Frightened Rabbit", which ultimately became the namesake of their future band, he stated: "I'd just get called 'The Bairn' on account of me being the youngest.

"[2] Grant and Scott subsequently recorded the band's 2006 debut album, Sing the Greys, with producer Marcus MacKay on his own label, Hits the Fan.

Regarding his aspirations during the band's early days, Hutchison noted: "When we first started, my measure of success was selling out King Tut's in Glasgow, and then being signed to Fat Cat and, more recently, getting the top ten album.

In 2018, Hutchison played alongside Scott and brothers Justin and James Lockey on the sole album from the project Mastersystem.

[5] However, Hutchison appeared behind the drums as a Frightened Rabbit member later that year: with fellow band member Billy Kennedy at the Belladrum Festival as part of a tribute by The Charlatans, and with the band featuring guest vocalists as part of the Glasgow charity event Sleep in the Park, in December 2018.

[6][7] In 2013, Hutchison mentioned the possibility of working on his own material, stating: "I'm hoping to maybe get something started with some friends back in Glasgow when I get home.

[8] In 2019 he and fellow Frightened Rabbit member Simon Liddell accompanied Australian musician Gretta Ray on her UK dates.

"[2] Regarding potential career options were he not a member of Frightened Rabbit, Hutchison had noted: "I have no qualifications to do anything else, so I'd probably be working in a cheese shop or trying to make my own cider.

[10][11][12] Hutchison is a supporter of the Cystinosis Foundation UK and was a trustee of the mental health charity Tiny Changes, set up by his family in 2019 following the death of his brother Scott.