Manager of Push to Talk solutions for Sprint. I have been working on PTT since 2000 either in a lab or in production. We utilize iDEN, CDMA1X, CDMA 3G, and LTE RANs. We leverage cloud solutions as well. I manage a large group filled with network engineers certified in Cisco, Red Hat and Cloudera (Hadoop). We have over $20M invested in our labs and we also function as a triage for production issues for over 2 million demanding business subscribers.