John White-Spunner, the president and CEO of White-Spunner Construction, has overseen the construction and renovation of scores of landmark projects in Mobile, including overhaul of the 1908 Van Antwerp Building (background), the city’s first skyscraper.  John White-Spunner founded Mobile-based White-Spunner Construction Co. in 1981, at age 24, but even in his teens, he was…