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Former Board of Trustees

The corporate powers and functions of GSIS are vested in and exercised by the Board of Trustees composed of the President and General Manager and eight other members appointed by the President, one (1) of whom shall be either the President of the Philippine Public School Teachers Association (PPSTA) or the President of the Philippine Association of School Superintendents (PASS), another two (2) shall represent the leading organizations or associations of government employees/retirees, another four (4) from the banking, finance, investment and insurance sectors, and one(1) recognized member of the legal profession who at the time of appointment is also a member of GSIS.

Chairman De Guzman


RENATO T. DE GUZMAN – Chairman
Age: 65
Date of First Appointment: June 26, 2015
Trainings / Seminars Attended:

  • 2015 – Corporate Governance Seminar, conducted by the Institute of Corporate Directors (held on 16 October 2015 at the InterContinental Hotel Makati)

Chairman RENATO T. DE GUZMAN graduated with a degree in Bachelor of Science in Management Engineering from Ateneo de Manila University. He also holds two master’s degrees: Business Administration (with distinction) from Katholieke Universiteit Leuven, Belgium, and Management from McGill University, Canada.

An accomplished banker, he spurred the growth of the private banking business in Asia while the Chief Executive Officer of ING’s Asia Private Bank (IAPB) and subsequently, of the Bank of Singapore, after IABP was acquired by Oversea-Chinese Banking Corporation (OCBC) in 2010 and renamed Bank of Singapore. He was responsible for the development of Bank of Singapore as Asia’s Global Private bank.

Because of his achievements in the world of banking, he received the ING Leadership Award. He was also named Outstanding Private Banker in Asia Pacific by Private Banker International in 2014, and Private Banker of the Year by Asian Private Banker in 2015. He was also conferred the Lifetime Achievement Award by WealthBriefingAsia. He was likewise named by Alpha Magazine as one of the 25 Most Influential People in Southeast Asia.


ROBERT G. VERGARA – President and General Manager
Age: 55
Date of First Appointment: September 20, 2010
Trainings / Seminars Attended:

  • 2011 – Strategic Planning Seminar Workshop, conducted by Ms. Mean Ignacio (held on September 06, 2011 at the Tower Club Makati City)
  • 2012 – Strategic Planning Seminar Workshop, conducted by Ms. Alma Bella Z. Generao (held on November 07, 2012 at the Nostalge Ortigas)
  • 2013 – Strategic Planning Seminar Workshop, conducted by Ms. Maria Lourdez Ortiz-Luis and Mr. Cesar P. Baltazar (held on August 1-2, 2013 at the Tagaytay Highlands)
  • 2014 – Strategic Planning Seminar Workshop, conducted by Mr. Gerardo A. Plana and Ms. Tess Villanueva (held on July 24-25, 2014 at the Planta Hotel Bacolod)
  • Corporate Governance Seminar, March 22, 2014, SGV
  • 10th ASEAN Finance Ministers’ Investor Seminar, May 20, 2014, Peninsula Hotel, Makati City
  • AMUNDI World Investment Forum, June 5-6, 2014, Paris, France
  • Leadership Session by Harvard Prof. Ronald Heifetz, August 15, 2014, Luna Bldg., Rockwell
  • GSIS Strategic Planning Seminar, November 3, 2014, Heritage Hotel, Manila
  • Management Action Planning Workshop, June 8, 2015, Midas Hotel, Manila
  • HR Roadmap Development Workshop, June 26, 2015, GSIS
  • Corporate Governance Training, September 5, 2015, SGV
  • 21st Session of the Conference of Parties to the United Nations Framework on Climate Change and the side event on Hydro-related Risks in Asia-Pacific and The Role of Disaster Risk Finance and Insurance,
    November 30, 2015, Paris, France

PGM ROBERT G. VERGARA graduated with double degrees in Management Engineering and Mathematics from Ateneo de Manila University (magna cum laude). He was President of the Management Engineering Student Association and a Management Engineering Departmental Awardee.

In 1986, he obtained his Master’s degree in Business Administration from Harvard Graduate School of Business Administration, with concentration on general management, finance and corporate strategy.

Prior to his appointment as PGM and Vice Chair of the GSIS BOT, he was the Managing Director and Founding Partner of Cannizaro (Hong Kong) Capital Partners Limited. He spent most of his career in Hong Kong where he was also a Trader of IFM Trading Limited, Managing Director of IFM Asia Limited, Principal of Morgan Stanley Dean Witter Asia Limited, Director or Dresdner Kleinwort Wasserstein Securities (Asia) Limited, Managing Director of Lionhart (Hong Kong) Limited.

He began his career as Assistant Manager of Citibank, N.A., Manila and also worked as Summer Associate of Shearson Lehman Brothers in USA, and Trader of IFM Trading Limited in England.

MARIO J. AGUJA – Trustee
Age: 50
Date of First Appointment: October 31, 2010
Trainings / Seminars Attended:

  • 2011 – Strategic Planning Seminar Workshop, conducted by Ms. Mean Ignacio (held on September 06, 2011 at the Tower Club Makati City)
  • 2012 – Strategic Planning Seminar Workshop, conducted by Ms. Alma Bella Z. Generao (held on November 07, 2012 at the Nostalge Ortigas)
  • 2013 – Strategic Planning Seminar Workshop, conducted by Ms. Maria Lourdez Ortiz-Luis and Mr. Cesar P. Baltazar (held on August 1-2, 2013 at the Tagaytay Highlands)
  • 2014 – Strategic Planning Seminar Workshop, conducted by Mr. Gerardo A. Plana and Ms. Tess Villanueva (held on July 24-25, 2014 at the Planta Hotel Bacolod)
  • 2015 – Corporate Governance and Risk Management (for Banks and Quasi – Banks ); conducted by Ateneo de Manila University and Ateneo – BAP Institute of Banking held on September 17-18, 2015
  • Financial Risk Management in Practice; conducted by Ateneo de Manila University Graduate School of Business and Center for Continuing Education held on November 28, December 5 and 12, 2015
  • 2015 – Strategic Planning Session, July 23-24, 2015 at the Tagaytay Highlands, Tagaytay City, Cavite

Trustee MARIO “MAYONG” JOYO AGUJA obtained his Undergraduate Degree in Sociology from the Mindanao State University, General Santos City (MSU-GenSan) in 1986 and his Master’s Degree in Sociology at the University of the Philippines, Diliman in 1991. He was a Graduate Research Fellow in the field of Sociology at the Institute of Socio-Information and Communication Studies, University of Tokyo, Japan from 1994 to 1996 and was a Graduate student in Comparative Culture with specialization in International Economics and Development Studies at Sophia University, Japan from 1996 to 1998. He obtained his Doctorate degree in International Cooperation Studies from Nagoya University, Japan in 2001.

He is currently a Professor at the Department of Sociology in MSU-GenSan and concurrent Chairperson of the MSU-GenSan Faculty Union. He was formerly President of the MSU System Faculty Confederation and at the same time Faculty Regent from 2009 to 2010. He also served as Chairperson of the Board of the Federation of Government Schools Employees’ Associations of the Philippines.

He was actively involved with various civil society organizations. He was formerly Executive Director of Building Alternative Rural Resource Institutions and Organizing Services (BARRIOS Inc.), Assistant Project Officer of Enfant et Development, Chairperson of Sustainable Integrated Area Development Initiatives in Mindanao-Convergence for Asset Reform and Rural Development (SIMCARRD Inc.) and a Member of the Board of Governors of the Philippine Red Cross. He is also actively involved in various peace and education advocacies for Mindanao.

Trustee Aguja was a member of the House of Representatives from 2002 to 2007 representing Akbayan Citizens’ Action Party.

ROMEO M. ALIP – Trustee
Age: 54
Date of First Appointment: September 24, 2013
Trainings / Seminars Attended:

  • 2014 – Strategic Planning Seminar Workshop, conducted by Mr. Gerardo A. Plana and Ms. Tess Villanueva (held on July 24-25, 2014 at the Planta Hotel Bacolod)
  • 2014 – Orientation Course on Corporate Governance; conducted by the Institute of Corporate Directors (held on March 6, 2014 at the Manila Peninsula, Makati)
  • 2015 – Strategic Planning Session, July 23-24, 2015 at the Tagaytay Highlands, Tagaytay City, Cavite

Trustee ROMEO M. ALIP earned two degrees in Education from Magsaysay Memorial College namely, Bachelor in Elementary Education in 1986 and Bachelor of Science in Education in 1989. He also completed his Master of Arts in Education from Columban College in 1989. He obtained his Doctorate degree in Philosophy from Angeles University Foundation in 1993.

Currently, he is the President of the Philippine Association of Schools Superintendents and Central Luzon Association of Schools Superintendent. He is the Schools Division Superintendent for the Bulacan Division Office of the Department of Education.

As a seasoned educator, Trustee Alip is a recipient of several awards including Meritorious and Outstanding Service Rendered to the Organization by the Boy Scout of the Philippines in 2011, Top Achievers Award in the Medium-Sized Division in the 2009 National Achievement Test, and Recognition Award for Excellent Public Service from the Sangguniang Panlungsod ng Malolos in 2007.

KARINA CONSTANTINO-DAVID – Trustee
Age: 69
Date of First Appointment: August 17, 2010
Trainings / Seminars Attended:

  • 2011 – Strategic Planning Seminar Workshop, conducted by Ms. Mean Ignacio (held on September 06, 2011 at the Tower Club Makati City)
  • 2012 – Strategic Planning Seminar Workshop, conducted by Ms. Alma Bella Z. Generao (held on November 07, 2012 at the Nostalge Ortigas)
  • 2013 – Strategic Planning Seminar Workshop, conducted by Ms. Maria Lourdez Ortiz-Luis and Mr. Cesar P. Baltazar (held on August 1-2, 2013 at the Tagaytay Highlands)
  • 2013 – Gender Sensitivity Workshop Seminar, conducted by the GSIS-GAD on 18 December 2013 at the Narra Hall, 8th floor, GSIS Main Building, Financial Center, Pasay City
  • 2014 – Strategic Planning Seminar Workshop, conducted by Mr. Gerardo A. Plana and Ms. Tess Villanueva (held on July 24-25, 2014 at the Planta Hotel Bacolod)
  • 2015 – Strategic Planning Session, July 23-24, 2015 at the Tagaytay Highlands, Tagaytay City, Cavite

Trustee KARINA CONSTANTINO-DAVID is the Chairperson of the Corporate Governance Committee of the Government Service Insurance System (GSIS).

Trustee David is also currently a Member of the Search Committee of the Office of the President of the Philippines; the Chairperson of the People Power Volunteers for Reform; the Chairperson of the Artists’ Welfare Project Inc.; a Board Member of the International Institute for Public Ethics; a Member of the Executive Committee of the Former Senior Government Official; the Board Director of Harnessing Self-Reliant Initiatives and Knowledge; and a Board Member of the Child Protection Network Foundation.

Prior to her appointment as GSIS Trustee, she was the Chairperson of both the Civil Service Commission and Career Executive Service Board from 2001 to 2008; the Secretary of Housing and Chairperson of the Housing and Urban Development Coordinating Council from 1998-1999; the Chairperson of the Home Development Mutual Fund, Home Insurance and Guaranty Corporation, National Home Mortgage and Finance Corporation, and Housing and Land Use Regulatory Board; and the Undersecretary of the Department of Social Welfare and Development.

Trustee David also served in the academe as a Professor of Community Development and Sociology at the University of the Philippines (UP), Diliman. She was involved in professional, civic and cultural associations such as Abanse! Pinay,and Inang Laya, among others.

Trustee David received numerous awards for excellent public service including World Bank’s Jit Gill Memorial Award for Outstanding Public Service in 2008, House of Representatives Committee on Women’s Most Outstanding Woman in Public Service in 2008, and Province of Bulacan’s Gawad Dangal ng Lipi Pinakamataas na Kategorya Paglilingkod Bayan in 2006.

Trustee David earned her degree in Sociology from UP Diliman in 1966 and earned her Master’s degree in Economics and Social Studies from the Victoria University of Manchester, England in 1974.

ELISEA G. GOZUN – Trustee
Age: 63
Date of First Appointment: September 24, 2013
Trainings / Seminars Attended:

  • 2014 – Strategic Planning Seminar Workshop, conducted by Mr. Gerardo A. Plana and Ms. Tess Villanueva (held on July 24-25, 2014 at the Planta Hotel Bacolod)
  • 2014 – Orientation Course on Corporate Governance; conducted by the Institute of Corporate Directors (held on March 6, 2014 at the Manila Peninsula, Makati)
  • 2015 – Resilience: Tools, Measurement and Application Workshop hosted by USAID Regional Development Mission Asia in partnership with the Rockefeller Foundation held on October 4-15, 2015 at Bangkok, Thailand
  • 2015 – Strategic Planning Session, July 23-24, 2015 at the Tagaytay Highlands, Tagaytay City, Cavite

Trustee ELISEA G. GOZUN graduated with a Bachelor of Arts from Southwestern University in Cebu City in 1976. She completed units for a Master’s degree in Environmental Management at the Philippine Women’s University in 1996. She was conferred Doctor of Environmental Management (Honoris Causa) by Ramon Magsaysay Technological University in 2004 and by Xavier University in 2008.

Aside from her current work at the GSIS, Trustee Gozun serves as Consultant to several World Bank projects including the Climate Public Expenditure and Institutional Review, Phil-Wealth Accounting and Valuation of Ecosystem Services, and Green Print 2030 Phase II. She is also a consultant to AECOM, which is a contractor for the United States Agency for International Development on the Climate Resiliency Team Leader, Be Secure Project. She has also worked with various UN Bodies, ADB, National Government Agencies and Local Government Units.

Prior to her appointment as GSIS Trustee, she also served as Presidential Assistant II on Climate Change from January 2011 to June 2013 and Secretary of the Department of Environment and Natural Resources from December 2002 to September 2004.

Her passion for the environment brought her to many civil society organizations serving as Chair of the Earth Day Network Philippines, the Earth Council Asia Pacific Philippines, and the Philippine Council for Environmental Protection and Sustainable Development which serves as the secretariat for the eco-labeling program in the country. She also held top positions in the Solid Waste Management Association of the Philippines, Partnership for Clean Air, Philippine Business for Environment, Green Kalinga Program of the Gawad Kalinga Foundation, Philippine Tropical Forest Conservation Foundation, Worldwide Fund for Nature Philippines, and League of Corporate Foundations. In the region, she chaired the Clean Air Initiative for Asian Cities Partnership Council.

In 2007, she was recognized by the United Nations Environment Program (UNEP) as the Champion of the Earth for Asia and the Pacific.

GERALDINE MARIE BERBERABE-MARTINEZ – Trustee
Age: 49
Date of First Appointment: October 20, 2010
Trainings / Seminars Attended:

  • 2011 – Strategic Planning Seminar Workshop, conducted by Ms. Mean Ignacio (held on September 06, 2011 at the Tower Club Makati City)
  • 2012 – Strategic Planning Seminar Workshop, conducted by Ms. Alma Bella Z. Generao (held on November 07, 2012 at the Nostalge Ortigas)
  • 2013 – Strategic Planning Seminar Workshop, conducted by Ms. Maria Lourdez Ortiz-Luis and Mr. Cesar P. Baltazar (held on August 1-2, 2013 at the Tagaytay Highlands)
  • 2014 – Strategic Planning Seminar Workshop, conducted by Mr. Gerardo A. Plana and Ms. Tess Villanueva (held on July 24-25, 2014 at the Planta Hotel Bacolod)
  • 2014 – Corporate Governance Orientation Program for Government Owned or Controlled Corporations (held on November 25, 2014 at the One Pacific Place, Makati City)
  • 2015 – Corporate Governance and Risk Management for Banks and Quasi-Banks (held on 17-18 September 17-18, 2015 at the Ateneo de Manila University, Graduate School of Business, Salcedo Village, Makati City)
  • 2015 – Strategic Planning Session, July 23-24, 2015 at the Tagaytay Highlands, Tagaytay City, Cavite

Trustee GERALDINE MARIE BERBERABE-MARTINEZ obtained her degree in Philosophy from UP Diliman, and her Bachelor of Laws Degree (LLB) from San Beda College. She chairs the Legal Oversight Committee of GSIS.

Prior to her GSIS appointment, she served as Provincial Board Member of the 2nd District of Batangas from 1995 to 1998. The Center for Women in the Municipality of Balayan, the establishment thereof she authored, won the 2000 Galing Pook (National) Award. She was also awarded as Woman Achiever by the Provincial Government of Batangas in 2000.

She worked as a Consultant at the Office of the Chairman of the Board of the Philippine Development and Management Council, Chief Legal Counsel at the Office of Senator Loren Legarda, Partner at the Pastrana Fallar Law Office, Senior Vice President and Legal Officer of Advance Solutions Inc., and Manager of the Marketing and Retirees Servicing Department of Philippine Leisure and Retirement Authority.

As a women and children’s rights advocate, she also worked for COMBAT-VAW or the Community-Based Approach to Violence Against Women Project, the Women’s Legal Bureau Inc., and PANLIPI, an NGO providing legal assistance to indigenous cultural communities to defend their ancestral domain.

ROMAN FELIPE S. REYES – Trustee
Age: 64
Date of First Appointment: September 20, 2010
Trainings / Seminars Attended:

  • 2011 – Strategic Planning Seminar Workshop, conducted by Ms. Mean Ignacio (held on September 06, 2011 at the Tower Club Makati City)
  • 2012 – Strategic Planning Seminar Workshop, conducted by Ms. Alma Bella Z. Generao (held on November 07, 2012 at the Nostalge Ortigas)
  • 2013 – Strategic Planning Seminar Workshop, conducted by Ms. Maria Lourdez Ortiz-Luis and Mr. Cesar P. Baltazar (held on August 1-2, 2013 at the Tagaytay Highlands)
  • 2014 – Strategic Planning Seminar Workshop, conducted by Mr. Gerardo A. Plana and Ms. Tess Villanueva (held on July 24-25, 2014 at the Planta Hotel Bacolod)
  • 2014 – Corporate Governance Seminar; conducted by the Philippine Securities Consultancy Corporation (held on May 19, 2014 at the Dusit Thani Hotel, Ayala Center, Makati)
  • 2015 – Orientation Course for Corporate Governance; conducted by the Institute for Corporate Directors (held on April 29, 2015 at the Manila International Container Terminal, South Access Road, Port Area, Manila)

Trustee ROMAN FELIPE S. REYES obtained his degree in Commerce major in Accounting from San Beda College in 1972 and proceeded to take his Master of Business Administration major in Finance from University of Detroit, Michigan, USA in 1975.

Aside from being a GSIS Trustee and Chairman of the Audit Committee, he is a member of the Board of Directors of Philippine National Construction Corporation. Trustee Reyes is also an independent director of Bank of Commerce, Pasudeco, All-Asian Countertrade and RPN-9, and Chairman of Reyes Tacandong and Co.

He was a Senior Partner and Vice Chairman of SGV and Co., President of Knowledge Institute and Supervisor of Ernst and Young New York. Trustee Reyes also served as President of Bulacan Kaunlaran Foundation and Bulacan Chapter of Philippine Institute of Certified Public Accountants

Trustee Reyes received several awards and recognition for his community service, which include Most Distinguished Bedan in 2004, Katangi-tanging Anak ng Bocaue in 1999 and Outstanding Bulakeño Dangal ng Lipi in 1994, among others.

GREGORIO T. YU – Trustee
Age: 57
Date of First Appointment: September 20, 2010

  • 2011 – Strategic Planning Seminar Workshop, conducted by Ms. Mean Ignacio (held on September 06, 2011 at the Tower Club Makati City)
  • 2012 – Strategic Planning Seminar Workshop, conducted by Ms. Alma Bella Z. Generao (held on November 07, 2012 at the Nostalge Ortigas)
  • 2013 – Strategic Planning Seminar Workshop, conducted by Ms. Maria Lourdez Ortiz-Luis and Mr. Cesar P. Baltazar (held on August 1-2, 2013 at the Tagaytay Highlands)
  • 2014 – Strategic Planning Seminar Workshop, conducted by Mr. Gerardo A. Plana and Ms. Tess Villanueva (held on July 24-25, 2014 at the Planta Hotel Bacolod)
  • 2014 – Corporate Governance Seminar, conducted by the Institute for Corporate Directors (ICD) on 26 May 2014
  • Corporate Governance Training, conducted by SGV and Co. on 22 March 2014
  • 2015 – Corporate Governance Seminar, conducted by the Institute for Corporate Directors (ICD) on 22 June 2015

Trustee GREGORIO T. YU graduated summa cum laude in Economics under the Honors Program of De La Salle University in 1978. Thereafter, he went on to obtain a Master’s degree in Business Administration from Wharton School of the University of Pennsylvania in 1983.

In the private sector, he is currently the Chairman of CATS Motors Inc. He also Chairs the Executive Committee of the Philippine Bank of Communications (PBCom), and sits as the Vice Chairman of Sterling Bank of Asia. Likewise, Mr.Yu serves as a Director of various companies such as the Philippine National Reinsurance Corporation, Philippine Airlines, Philequity Fund, I-Remit Inc., UniStar Credit and Finance Corporation, Prople BPO, Vantage Equities, Yehey Corporation, i-Ripple Inc., WSI Corporation, Nexus Technologies, and Jupiter Systems Corporation. In addition, he is also a Trustee of Xavier School Inc., and a Board Member of both Ballet Philippines and the Manila Symphony Orchestra.

Prior to his appointment as GSIS Trustee, Mr. Yu had also served as President and CEO of Belle Corporation, Tagaytay Highlands International Golf Club Inc., Tagaytay Midlands Golf Club, and the Tagaytay Highlands Country Club. He was also the Vice Chairman of the APC Group and Philippine Global Communication, and served as a Director of the International Exchange Bank. Mr. Yu started his career with the Chase Manhattan Bank Asia, based in Hong Kong, as its Director for Corporate Finance and Vice President for Area Credit.