Levien thinks that having Fletcher back in his squad can help revitalise Scotland's bid to qualify for the 2014 World Cup in Brazil.
He told the programme Scotland United: "I just have huge, huge admiration for the boy, to know what he has gone through, to see his resilience, his bravery and his absolute determination to play for Scotland.
"Getting him back, for me in a selfish way, is a great thing for me and for Scotland. The person that I'm most happy for is Darren.
"He's the one who's had to grit his teeth at times and get through it and get himself back to this point where he's on the fringes of coming back into the team again. He has a presence about him that has a calming effect on the rest of the squad. He can't be anything else other than inspirational for the rest of the group."
Scotland continue their qualifying campaign with an intriguing tie against British rivals Wales on Friday, October 12.