The Hawks' back row man will replace the injured Rob Dewey who dislocated his shoulder for a second time in his return match for the Edinburgh Gunners against London Wasps in the Heineken Cup last Saturday.
Coach Rob Moffat said: "Scott has been training well and deserves his chance. He is a dynamic back row forward with good skills and with his attitude these attributes will further develop in this positive environment."
In Wellington (3 and 4 February) Scotland face England, Australia and Papua New Guinea before heading to Los Angeles (11 and 12 Febraury) where they will take on Fiji, Argentina and Uruguay.
SCOTLAND 7s SQUAD FOR WELLINGTON AND LOS ANGELES
Mark Lee * (King's Own Scottish Borderers) CAPTAIN, David Gray * (Exeter Chiefs), Scott Forrest (Glasgow Warriors and Glasgow Hawks), Ross Rennie (Edinburgh Gunners and Stewart's Melville FP), Oli Brown * (Boroughmuir), Ciaran Beattie (Border Reivers and Selkirk), Mark Robertson (Melrose), Colin Gregor * (Glasgow Warriors and Watsonians), Rory Lawson * (Edinburgh Gunners), Ali Warnock * (Nottingham), Clark Laidlaw * (Jed-Forest), Nick De Luca * (Edinburgh Gunners and Heriot’s)
* indicates member of the Scottish Institute of Sport