He is currently a researcher at the Millennium Institute for Cell Dynamics and Biotechnology; and runs a Fondecyt project funded by CONICYT (the Chilean agency for research funding). He has headed the Center for Web Research (a Millennium Nucleus funded by the Chilean government); RIBIDI, a Latin American project funded by CYTED; a project funded by Yahoo! Research; and other three Fondecyt projects. He has participated in several research projects such as an ECOS/CONICYT (Chile-France cooperation), AMYRI (a previous CYTED project), and five other national projects (Fondecyt and Fondef).
He is or has been PC (co-)chair of several conferences: SPIRE 2001, SCCC 2004 and a track of ENC 2007 (published by IEEE CS Press); SPIRE 2005 and IFIP TCS 2006 (published by Springer); and SIGIR 2005 Posters (published by ACM). He co-created conference SISAP in 2008 (published by IEEE CS Press). He is member of the Steering Committee of LATIN and SISAP, and of the Editorial Board of Information Retrieval journal, and of ACM Journal of Experimental Algorithmics. He has been PC member of 45 national and international conferences and reviewer for around 40 international journals. He has given around 45 invited talks at several universities and international conferences, including six plenary talks in conferences.
He has coauthored a book published by Cambridge University Press, 15 book chapters, 6 international conference proceedings (editor), a special issue in an international journal (editor), 78 papers in international journals, 142 papers in international conferences, and 24 in national and regional conferences. According to Thompson's ISI, two of his papers rank within the 1% most cited in Computer Science. According to ResearchIndex, he is ranked at position 2,387 among the most cited authors in Computer Science, first within Chile.