Ethnically Cañari, Pérez is a former member of the eco-socialist Pachakutik Party. On 14 May 2019, he was elected as Provincial Prefect of the Azuay Province. As the former president of indigenous rights group ECUARUNARI, Pérez then rose to national prominence during the 2019 demonstrations against President Lenín Moreno's neoliberal economic policies. Described as an "anti-mining activist", Pérez has been involved in protests against water privatization efforts and the proposed Quimsacocha mining project, which led to him being charged with terrorism. Though a leftist, Pérez is noted for opposing the extractive measures championed by former socialist President Rafael Correa and his allies.