David Siegel, vice president of data services product management at Global Crossing, has been involved with Internet network engineering since 1992 when he founded an Internet service provider in Tucson, Arizona. He is responsible for numerous product lines, including Internet Access, MPLS VPN, Ethernet, and Managed Solutions.

Siegel has been with Global Crossing since 1998 in various roles, including vice president of IP engineering, vice president of global network architecture and long range planning, as well as other functional and management roles in engineering and product development.
Prior to joining Global Crossing, Siegel was the principal consultant at Siegel Internet Engineering, providing network development and disaster recovery analysis for Verio and Earthlink. He also was president and CEO of RTD Systems & Networking, Inc., a Tucson-based company providing Internet services, Unix and network consulting services, and a billing software package for ISP's.