Celtic's chief executive takes his place as the nominee of the recently-established professional game board.
Lawwell said: "While there are certain challenges facing the game in Scotland, there is also a great deal to be positive about and much to look forward to.
"We must build on these positives and I look forward to playing my part in working to improve and develop various aspects of the game."
He joins SFA office bearers: chief executive Stewart Regan, president Campbell Ogilvie, vice-president Alan McRae and second vice-president Rod Petrie on the board along with Barrie Jackson, the independent non-executive director.
Meanwhile, Celtic have confirmed they will enter a team in Uefa's Youth League.