For over 15 years, Guillermo has participated in numerous actions for economic justice, making him a firm believer in the power of collaboration and networking. His passion for Palestine began in 2008 when he was part of a pilgrimage to Israel and witnessed the blatant injustice toward the Palestinian people. In the years that followed, Guillermo organized several educational programs to lift awareness and prepare the community for a BDS campaign that climaxed in the summer of 2015 with the denominational pledge to divest funds from the UCC pension. He was part of the IFPB Olive Harvest delegation in 2013 and the Sabeel Conference that followed. He authored Rise of the Spiritual Activist (2012) and enjoys writing op-ed pieces.