The 22-year-old centre put pen to paper on a two-year extension in January, at a time when he was still considered an academy prospect in his final year of university studying Law.
With a career in professional rugby now in his grasp, Scott has set his studies to one side to focus fully on performing for Edinburgh and Scotland.
Scott earned his first cap for Scotland in the Six Nations in March. A month later he featured in the Heineken Cup quarter- and semi-finals, before being selected to start all three matches on his first Scotland tour.
He said: "I'm very fortunate to be in this position. It's very encouraging and shows that Edinburgh Rugby is a club that looks after players that give their all.
"There's a really good group of players coming through and we're all really happy to stay here for the foreseeable future.
"We've got a captain and coach who really want us to win things and with this group of players I believe we can achieve these goals. That's my main reason for staying at this club."
Head coach Michael Bradley said: "We are delighted that Matt sees his long-term future at Edinburgh Rugby.
"Matt has worked very hard, both on and off the pitch and, as an athlete, he is developing into one of Edinburgh Rugby's most powerful and explosive players.
"His ability to create a half gap or play someone through a defensive line are qualities that will enable him and Edinburgh Rugby to achieve our long term ambitions of challenging for silverware."
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