Santiago Alvarez, CCIE No. 3621, joined Cisco in 1997 as a member of the Technical Assistance Center. Since 2000, he has contributed as Technical Marketing Engineer within the Cisco IOS Technology Group. He focuses on MPLS and QoS technologies. He has been a regular speaker at Networkers and a periodic contributor to Packet magazine. Santiago holds a BS in Computer Science from EAFIT University, an MS in Computer Science from Colorado State University, and an MS in Telecommunications from the University of Colorado at Boulder.