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The Department of Environment and Natural resources (DENR), the Department of Finance (DOF), the Bureau of Immigration (BI), the Department of Transportation and Communication (DOTC), Bangko Sentral ng Pilipinas (BSP), and the University of the Philippines Los Baños (UPLB) have endorsed the ratification of the HCA.
He also served as assistant professor in international studies at De La Salle University from 1997 to 1998, instructor in political science at the University of the Philippines (Los Banos) from 1992 to 1995, and in 1996 University Research Associate at the University of the Philippines (UP Diliman), where he took his BA, MA and PhD (ABD or All But Dissertation status) all in Political Science.