Young said: "I've been away from Scotland since I was 19 - I had a few years at Leicester and a season at Gloucester - and I felt moving back and playing for Edinburgh was the right choice. I've worked with Andy Robinson and Rob Moffat before with Scotland 'A' and I was really impressed by both of them.
"Edinburgh are moving in the right direction. They have got a young squad who are full of ambition. I just want to be a part of that and I think Edinburgh is the right environment for me to come on as a player.
"I'm still a young tighthead and now I want to challenge for a place in the Edinburgh team. I realise the importance of playing week in, week out in front of the national selectors and that played a part in my decision.
"I have aspirations and ambitions to get capped at Test level and, if I can take my opportunity, then Edinburgh will provide the right platform for me to achieve my career goals."
Young believes he will fit seamlessly into the Edinburgh squad; because he has played with most of them before at age-group level for Scotland.
He added: "I've played with the majority of the Edinburgh team with Scotland age-grade teams, so I know them well. I'm good friends with a lot of them, so I'm really looking forward to working with these guys week in, week out. There is a lot of young talent at Edinburgh and lots of ambition; they were the two main pulling factors."
Despite being born in Belfast, Young grew up in Glenrothes with hooker Sean Crombie and he says the presence of a few familiar Fifers will help him settle in quickly.
He said: "Me and Sean played our junior rugby at Glenrothes and then we moved to Kirkcaldy at the same time and played in the front row together. There are quite a few Fifers in the Edinburgh team; Fraser McKenzie, Andrew Easson and Ryan Grant and I'm looking forward to settling in quickly."
Head coach Andy Robinson believes Young will be an astute signing and will strengthen the front row. Robinson said: "I've worked with David before with Scotland 'A' and he really impressed me.
"He is a young player with a lot of potential and, if he continues to work hard and develop, looks set to have a bright future with Edinburgh. If young players work hard enough and are determined to improve then they will be given a chance; Kyle Traynor's progress this season is a good example of that.
"This move follows the arrivals of two other exciting young players, Ross Samson and Roddy Grant and underlines our determination to move forward as a team."
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