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John Nguyen is a Senior Architect at Sun Microsystems working in Advanced Internet Practice (Sun Professional Services). He has over 10 years' experience in software engineering, systems management, networking, security, and architecture design for large-scale service providers, portals, and Internet datacenters. John is currently working on wireless technologies such as Location-Based Services, Mobile Messaging, Wireless Portal, 3G Wireless Networks, and Wireless Intelligent Networking. John holds a BS in Electrical Engineering, BS in Computer Science, and Ph.D. in Computer Science.