Guillermo Lambarri

Director of External and Legislative Affairs | AT&T

Guillermo Lambarri is State Director of External and Legislative Affairs for AT&T. In this role, Guillermo helps lead external, governmental and public affairs in the state of Colorado and Wyoming. He is charged with cultivating relationships with elected officials and key stakeholders, while promoting AT&T’s philanthropic efforts through strategic partnerships and leading infrastructure deployment. Guillermo has extensive professional experience in business development, government and community affairs, and has a collaborative, local approach to problem solving. Previously, Guillermo served as Public Affairs Manager for AT&T in Texas where he led the development and implementation of communications strategies with external and legislative teams across the state. Prior to joining AT&T, he was Director of Strategic Initiatives at the Houston Hispanic Chamber of Commerce where he advocated for Houston’s Latino Business Community. Guillermo has an MBA in Global Leadership from the University of Houston’s Bauer College of Business. He currently serves on the board of directors for the Latino Community Foundation of Colorado, Latin American Educational Foundation, the Colorado Competitive Council, ACTION22 and is a co-chair of the Denver Metro Chamber of Commerce’s infrastructure committee. In 2015, Guillermo was featured by Latino Leaders Magazine as one of Houston’s top Latino influencers and most recently was recognized by the Denver Business Journal as a 2022 40 under 40 award winner. He is a first generation Mexican American and a native Texan. Outside of work, he enjoys fly fishing and exploring the mountains with his wife, Whitney, daughter, Camila and son Benicio.