Sonic Corp. appoints Jose A. Dueñas as EVP and chief brand officer   OKLAHOMA CITY, 2017-Aug-10 — /EPR Retail News/ — Sonic Corp. (NASDAQ:SONC), the nation's largest chain of drive-in restaurants, today (Aug 9, 2017) announced the appointment of Jose A. Dueñas as executive vice president and chief brand officer. Dueñas will be responsible for the end-to-end customer experience including…