Director of the Casa de la India in Valladolid, the Indian cultural centre in Spain, since its foundation in 2003 by the University of Valladolid, the City Council of Valladolid, and the Government of India. Ph.D. holder from the University of Valladolid and the University of Kerala (2006), where he researched contemporary Indian poetry in English and submitted a dissertation on A.K. Ramanujan`s aesthetics and poetics. After a seven-year study and research period at Loyola College, Madras (M.A.) and the University of Kerala, Trivandrum, in the 1990s, Guillermo returned to the University of Valladolid where he held the post of Indian Studies Coordinator at the Centre for Asian Studies of the University of Valladolid from 2000 to 2003. He has lectured extensively on contemporary Indian literature, Indian poetics and aesthetics, Bhakti literature, Indian performing arts traditions and literary criticism.

Guillermo is a multi-disciplinary scholar, translator, cultural manager, producer and writer and has published in India, Spain, France, Poland, U.K.and Germany. As an expert in Indian culture he is advisor to various institutions in India and Europe. In 2012 he was awarded the Friendship Award by the Minister of External Affairs, Government of India for his contribution to Indo-Spanish cultural relations. His landmark book on the Indian poet scholar A.K. Ramanujan, When Mirrors are Windows: A View of A.K. Ramanujan`s Poetics, was published by Oxford University Press in June 2016. He is also the co-editor, with Krishna Ramanujan, of Journeys. A Poet´s Diary (A.K. Ramanujan) brought out by Penguin/Hamish Hamilton in 2019.