The 25-year-old has played five times for the Wallabies and has spent the majority of his professional career playing for the Queensland Reds in Super Rugby.
Also capable of playing at fly-half, Frisby spent four months of last season in the Top 14 with Bordeaux Begles where he made nine appearances and scored one try.
During his time in Australia he racked up 69 points in 66 matches for the Brisbane franchise, including 11 tries, the first of which came on his debut against the Sharks in 2012.
Frisby's versatility made him a key member of the Reds squad and he competed with Will Genia and Quade Cooper for the 9 and 10 jerseys. In 2015 he showed just how versatile he is, spending seven games as his side's starting fly-half due to injury. In 2016 he took over the role as Reds' starting scrum-half and featured in all 15 Super Rugby games.
Nick won his first cap for Australia against England in the 2016 June Test window and in the same year he went on to play a further four matches for the Wallabies against New Zealand, Wales and England. He was the first-choice scrum-half for Australia U20 at the Junior World Championship in South Africa in 2012.
When not playing Super Rugby he represented Brisbane City in the National Rugby Championship and scored 28 points in 28 appearances. He helped them win their inaugural title in 2014 and was their starting scrum-half throughout their undefeated campaign in 2015.
Speaking to glasgowwarriors.org, Nick Frisby: "I'm super excited to be joining Glasgow Warriors. I'm looking forward to getting over and ripping into pre-season with the boys.
"I played club rugby with Sam Johnson back in Brisbane and worked under Matt Taylor at the Reds, so they've both told me how good the club is and how hard the boys work, so I'm excited to get over and be involved.
"I've played against Dave Rennie's sides in Super Rugby and as soon as I heard he and Glasgow were interested it was a no-brainer. His Chiefs sides were always really exciting, and Glasgow are too and I think his style of play will suit my game really well.
Glasgow Warriors Head Coach Dave Rennie said: "With Henry Pyrgos moving on it's great to replace him with an international half-back. Nick has an outstanding skill set, he is quick and has a quality pass and kick. He's also incredibly versatile, while he's predominantly a nine the Reds sometimes played him at ten and as a young player he played a lot of fifteen.
"Coaching the Chiefs, when we were playing the Reds we would dedicate time in the week leading up to the game to shutting Nick down because of how dangerous he can be. His running game and ability to create space for others is a real point of difference.
"I've spoken to him recently and he's incredibly competitive, he's still a young man and we're really excited to have him here and the fact that he'll be here all year round is an extra bonus."