John is a Vice President at Subex, with responsibility for the Americas. His extensive experience of telecommunications spans fixed, mobile, data, and video technologies. With Subex (formerly Connexn/Subex Azure) since 1999, John has directed over 40 successful cost, revenue, and business optimization engagements at over 24 top-tier carriers globally, including AT&T, America Movil, BT, Vodafone, and Verizon.