James McCrone Johnstone spent the majority of season 2012-13 with Scotland 7s, while in contract with Glasgow Warriors before signing for the abbreviated national team full-time at the outset of the 2013-14 season.
As well as being involved on the World Series, Johnstone has also won two caps in the FIRA-AER European GP circuit and was involved in the Rugby World Cup 7s in Moscow in June 2013.
Impressive performances throughout the 2013-14 season saw Johnstone named in the Scotland 7s squad that would compete in the summer's home Commonwealth Games, in Glasgow.
A powerful, elusive presence, the centre learned his trade with Edinburgh clubs Watsonians and Currie and has represented Scotland under-20, under-19 and under-17 level.
Johnstone is a former pupil of Merchiston Castle School.
Commonwealth Games stats: 1 cap (Glasgow 2014), 1 try and 5 points
FIRA-AER stats (from 2012): 3 caps, 5 tries, 2 conversions and 29 points
Rugby World Cup 7s stats: 1 cap (Moscow 2013)
HSBC Sevens World Series stats: below