Southwest Air(play) Lines: Former Southern Ground VP/Promotion Mara Sidweber will join Capitol for Southwest regional promotion June 1. This marks a return to the imprint she left in July 2008 to join the Bigger Picture promotion team. She will be based in Dallas and succeeds Jeremy Guenther. Until her UMG email is activated June 1, Sidweber can be reached at 469-231-6302 or here. Guenther exits after three-and-a-half years with the label, and is grateful for his time there. "Once you've had a doctor say you've got an hour to live, everything else is secondary," he tells Country Aircheck, referencing his recovery from a brain tumor removed in 2013. "[UMG/Nashville Chairman/CEO] Mike Dungan is truly a good dude, and I'm taking away a lot of No. 1s and experiences that only four people in the world got to have." After a couple weeks of down time, he'll be seeking a new opportunity in the business. Reach him at 501-590-4878 or here.