Gene Sawyer, a certified wireless network expert, currently serves as Senior Wireless Consulting Engineer for Cisco. He has worked for several wireless startup companies, including Trapeze Networks and Airespace. Jeff Smith has been implementing telecom solutions for over 20 years, with the past seven years focused exclusively on WiFi network design and security. Smith is currently a Consulting Systems Engineer in Cisco’s Advanced Technologies Wireless Group, where he designs and implements wireless networks for Cisco System's customers. A certified wireless network expert, he holds CISSP certification. Both authors often teach advanced wireless networking topics within Cisco.