Guilherme Ribenboim is the General Manager for Yahoo! Brazil. Since starting his career with the company in 1998, he has held a variety of integral roles within the organization and helped launch Yahoo! Search Marketing's operation in Brazil. He has also actively participated in all aspects of the company's TeRespondo acquisition.

Prior to his current role as General Manager, Guilherme was Manager of the Sponsored Matches Business Unit where he was responsible for the hiring an entire team to launch the product, as well as developing sales and CRM strategies. He also held the position of Ecommerce/Premium Services Manager, developing Yahoo!'s Shopping strategy and building long-term relationships with top eCommerce companies in Brazil. He also he participated in all aspects of Cade Acquisition which established Yahoo! as the #3 player in the Brazilian market.

Additionally, Guilherme was the Business Development Manager and was responsible for the company's advertising agreements. In this role, he built a long term portfolio, bringing in clients such as Creditcard (the largest credit card company in Brazil), Renault, and Mercado Livre (the largest auctions Web site in Latin America).

Previous to his career at Yahoo! Search Marketing, Guilherme was the General Manager at InvestShop, a leading Latin American online financial services institution. There, he developed the company's business plan and raised the first-round of capital investments. He also founded, led and managed the business development group, which negotiated alliances and strategic partnerships with all major Internet companies in Brazil.

Guilherme holds both a Bachelors and Master Degree in Economics from Pontificia Universidade Católica do Rio de Janeiro.