L.L.B., University of the Philippines (1963), Cum Laude and Salutatorian; admitted to the Bar in 1964, at 2nd place.
Chairman, Student Editorial Board; Philippine Law Journal.
L.L.M, Harvard Law School (1965).
Associate at the Law Offices of Winthrop, Stimson, Putman and Roberts, New York, N.Y. (1965-1966).
Former Senior Partner, Siguion Reyna, Montecillo & Ongsiako Law Office.
Past President, Philippine Bar Association; Past President, Rotary Club of Makati East; Member, Capitol Jaycees Senate; Member, Harvard Club of the Philippines; Member, Sigma Rho Fraternity.
Market-Leading Lawyer for Banking, Finance and Tax, Asia Law Profiles.
Leading Individual for Taxation (2019), Hall of Fame for Taxation (2020 - 2022), Recommended Lawyer for Corporate and M&A (2022), Legal 500 Asia Pacific.
The Philippines’ Top 100 Lawyers, Asia Business Law (2018)(2019)(2020)(2021).
Address
6th & 7th Floors Tuscan Building 114 V.A. Rufino Street, Legaspi Village, 1229 Makati City, Philippines