Andy then took up an opportunity to move to New Zealand and play in the ITM cup with Counties Manukau RFU and under head coach, and All Blacks great, Tana Umaga.
Muirhead made the move back to Australia in 2015, helping Souths win the Premier Rugby title that year.
Following a stellar season he was chosen to play with Brisbane City in the NRC rugby competition.
Towards the end of 2016 Muirhead moved to Canberra for an opportunity to train with the ACT Brumbies.
Since his debut Andy has represented the ACT Brumbies more than 90 times and was also selected in the Wallabies squad in 2021.