John Hanna, Simpl's chief operating officer, is leaving the service provider and consultancy to join start-up Mobilis.
Simpl CEO Bennett Medary says Hanna drove operational change at the company and built a strong sales engine there.
Hanna says Mobilis is developing next-generation services in IP media. These are "soft systems" that can be dropped in, fully integrated, with ISP billing systems to deliver services such as streaming media and softphones.
Hanna says he's done the job he went to Simpl to do, boosting the company's monthly run-rate 50% in eighteen months.
Hanna joined Simpl in November 2006. He previously worked for IBM, Computerland and SolNet.