A veteran public servant, Mark Wittenburg’s career centers on two locales with broadly different climates. Tempe, Ariz., where he spent more than 30 years, the last four as CIO, is a desert climate where flash floods can happen; Raleigh, N.C., where he has been CIO for three-and-a-half years, is subtropical. “I arrived two weeks prior to Hurricane Ian and I happened to run into the stormwater guy. Which is funny because in Arizona, we had — a guy.