De la Sierra has participated with organizations that col¬laborate with the UN, while parallelly holding philanthrop¬ic activities that help over 20 national and international entities each year. He has collaborated with organ-do¬nation foundations such as “Asociación ALE”, environ¬mental and other organizations, such as Aid for AIDS in New York, Fundación México Vivo, “Fundación Unidos Somos Iguales Cuernavaca A.C.”, and “Fundación Todo por el Cine”, among others.
With a career of over 13 years as a sculptor, De la Sierra has been able to exhibit his work in some of the most important cities in the world, in countries like Italy, Chi¬na, South Korea, the US and Mexico. He has been se¬lected to participate in different prestigious biennials in Spain Japan, and Italy. He has also participated in both domestic and international fairs, such as Zona MACO CDMX, SCOPE Miami and SCOPE Nueva York, Art Mar¬ket San Francisco, Art Palm Springs, LA Art Show, Art Bu¬san, Asia Contemporary Art Show, Expo Chicago and Affordable Art Fair Singapore. Among important exhibi¬tions, “Timo and his World” (2017) which took place at Zhou B Art Center in Chicago, Illinois and “Timo Miran¬do al Sureste” (2019) in Mérida, Yucatán, stand out. In 2022, his large-scale artwork “Horizonte” is selected to be presented in Venice, within the framework of the bien¬nial, in the exhibition “Personal Structures”, organized by the European Cultural Center.