Hosts reveal Commonwealth Games Sevens squad
irb.com 22 May 2014 Getty Images
Lamont, who last played for Scotland Sevens in 2009, comes into the squad with 86 international caps and having also been a part of the 2002 Commonwealth Games squad in Manchester.
Seymour, has has eight caps to his name, has also been named but has not yet been involved with the Sevens side before.
"Sean is a player with a significant amount of Scotland caps," said head coach Gemmell.
"The pace, power and physicality he will bring tot his squad allied with his Sevens understanding, gathered from the World Series and a previous Commonwealth Games, will be invaluable.
"Tommy is a proven finisher at international and professional level. His skill set is relevant across the board for Sevens, as a strong defender and he is good with the ball in the air."
Scotland will play New Zealand, Barbados and Canada in their pool matches on 26 July.
Squad: Richie Vernon, James Eddie, James Johnstone, Roddy Grant, Scott Riddell, Colin Shaw, Lee Jones, Colin Gregor, Scott Wight, Mark Bennett, Sean Lamont, Tommy Seymour