After breaking into Edinburgh's first XV at the beginning of the 2017/18 season, Johnstone signed a two-year deal to remain at the club on a full-time basis.
A former Scotland Sevens star, Johnstone burst onto the World Series Sevens circuit in 2013.
The abrasive centre represented Scotland at the Rugby World Cup 7s in Moscow that same year before competing in the Glasgow 2014 Commonwealth Games.
He finished Scotland’s second highest try-scorer for the season in 2015/16, crossing the whitewash on 22 occasions and played a pivotal role in Scotland’s historic Cup win in the final leg of the 2015/16 Series in London. He has amassed a staggering 40 caps for the Sevens side.
A product of Merchiston Castle School, Johnstone played his club rugby at capital based sides Currie and Watsonians before making his Edinburgh debut from the bench in the 2015/16 season opening victory over Leinster.
Johnstone scored his first try for Edinburgh in the 24-19 1872 Cup securing win over Glasgow, while the centre signed a new deal to keep him in the capital until 2020.
Home Shirt Sponsor: Firm of Messrs David Dalling
Date of birth: 17 April 1990
Height: 5'10
Edinburgh Debut: 4 September 2015 (Leinster)
Place of birth: Dumfries
Weight: 90.3kg
International career

Scotland 7s - 41 caps
Stats
Appearances
Total Points
Tries
Other players

Mark Bennett
Outside Centre

Jaco Van Der Walt
Fly-half

Eroni Sau
Left-wing

Charlie Shiel
Scrum-half

Nic Groom
Scrum-half

Matt Gordon
Inside Centre

George Taylor
Outside Centre

Damien Hoyland
Right-wing

Alec Coombes
Right-wing

Darcy Graham
Right-wing

Jamie Farndale
Right-wing

Henry Pyrgos
Scrum-half

Dan Nutton
Scrum-half

Blair Kinghorn
Full-back

Duhan Van Der Merwe
Left-wing

Chris Dean
Inside Centre

Jack Blain
Right-wing

Jordan Venter
Inside Centre

Korie Winters
Left-wing
