Junior was born in Fiji and moved to Scotland at the age of 10 with his parents. He has served as an infantryman with The Royal Scots Borderers, 1st Battalion The Royal Regiment of Scotland since February 2010, deploying on overseas training exercises to Kenya and Cyprus.
He has played for Heriot's in the BT Premiership, while in May he scored a try for the British Army and was named man of the match in their 36-18 win over the Royal Navy in front of 80,000 supporters at Twickenham.
He scored a try in Glasgow's pre-season meeting with Clermont Auvergne.
The winger has also played for Bath Rugby and Belfast Harlequins.