David Hilliard Williams is an internationally-known expert in the wireless/mobile communications field and President and Founder of E911-LBS Consulting.  He specializes in wireless location business, product, and technology strategy development and implementation services involving technologies including Global Positioning Satellite (GPS) systems, Beacon-based systems, Network-Based location determination technologies (TDOA, Cell ID, ECID, AFLT), Wireless 911 (E911), Real-Time Location Systems (RTLS), Radio Frequency Identification (RFID), location-enabled Wireless Fidelity (Wi-Fi), Radio Frequency Pattern Matching (RFPM), Near Field Communications (NFC), 4G LTE-based location systems, and their various hybrids.

He is an expert in the full range of business and consumer location-based services (LBS) that utilize these technologies, including navigation, telematics, fleet management, mobile local search, asset management, mobile resource management, supply chain management, family tracking, mobile social and business networking, proximity-based entertainment & leisure, mobile gaming, intelligent transportation systems, safety and security, and other location-aware applications.  Mr. Williams has very extensive expertise in all aspects of LBS delivery across the wireless location ecosystem including enabling network, map data, geospatial platform, chipset, data management, device, and infrastructure and integration providers.