Professor Alonzo served the University for 45 years, joining as Professorial Lecturer in July 1968 and retired in February 2013 as Professor 12. Prof. Alonzo served UPSE as Director of the Program in Development Economics, Director of the Public Affairs Office and Department Chair. He also served UP as Vice President for Development (2005-2009) and Director of the Institute for Small Scale Industries (2004-2009). In 2016, Prof. Alonzo became a Professor Emeritus.
His body lies in repose at the Sta. Maria dela Strada Church, Katipunan Road, Quezon City. The UP School of Economics family is organizing a necrological service in his memory on Friday, 10 November 2017, 3:00 PM at the Sta. Maria dela Strada Chapel.