Signature Flight Support has promoted several executives as company head Michael Scheeringa fills a new role as president and CEO of the newly created Flight Services division at parent BBA Aviation. Taking over for Scheeringa at Signature is Maria Sastre, who has been promoted to president and COO at the FBO chain. Sastre reports directly to Scheeringa. In addition, Signature promoted Geoff Heck to senior vice president of sales and marketing, a position where he will focus on global sales.