Born in Homebush, Lang was educated at North Auburn Public School and Burwood Intermediate High School before entering his father's real estate business, Lang and Daes, in 1925.
He also served as secretary of the Auburn Starr-Bowkett Co-operative Building Societies.
[2] Lang was forced to rely on preferences at the 1947 state election, when independent Alexander Kerr won 22.2% of the vote.
Despite the fact that the majority of those preferences flowed to the official Labor candidate, Lang's primary vote lead was enough to retain the seat.
The Liberal Party contested the seat, with the result that Dring easily defeated Lang.