Establishes company among the Valley’s longest-standing, homegrown commercial general contractors Leading Phoenix-based general contractor Stevens-Leinweber Construction (SLC) today announced its 45th anniversary. The milestone makes SLC one of metro Phoenix’s longest-standing, homegrown general contractors and a go-to source for leading local, regional and global clients. Founded in 1981 by Mike Stevens and Mark Leinweber, SLC began as a startup focused on commercial tenan