Guided by its vision-mission statement, NAC recognizes that corporate governance is central to longevity and success. Thus, it is committed to the highest standards of corporate governance by establishing a well-represented Board whose actions and decisions are anchored on the core values of the Group.
Jose Isidro N. Camacho
Non-Executive Director
Chairman of the Board
Jose Isidro N. Camacho
Non-Executive Director
Chairman of the Board
Date First Elected to the Board: June 7, 2024
JOSE ISIDRO N. CAMACHO is the Chairman of the Company and serves as Chairman of the Board’s Finance Committee and Corporate Governance Committee. He is currently the Chairman of the University of the Arts Singapore, Diniwid Beach Corp., and Bangko ng Kabuhayan, and Co-Chairman of Jin Chan Invest Pte Ltd. He is a Director of Advintel Inc. and Singapore Tyler Print Institute and an Independent Director of Trans Diversified Group Inc. and Citadel Pacific Limited. He is a Senior Adviser to TPG Capital (Singapore), Neurocredit (Singapore), Golden Ridge Ventures (Singapore), and SICPA (Switzerland) and a Founding Member of Asia Peace and Reconciliation Council (Thailand).
Prior to joining the government, Mr. Camacho served as Managing Director and Chief Country Officer for the Philippines at Deutsche Bank AG in Manila. Before joining Deutsche Bank, he spent over 20 years with Bankers Trust Company, holding various positions across New York, Japan, Hong Kong, the Philippines, and Singapore, and ultimately serving as Head of Investment Banking for Southeast Asia and Chief Executive Officer for Singapore.
He was appointed Secretary of Finance of the Philippines in 2001 and served until November 2003, where he led the country’s economic team and supervised the fiscal and financial sectors. Prior to this, he served as Secretary of Energy and was instrumental in the passage of key power sector reform legislation. He also chaired several government institutions, including Land Bank of the Philippines, the Philippine Deposit Insurance Corporation, Trade Development and Investment Corporation (PhilExim), Home Guaranty Corporation, National Power Corporation, Power Sector Asset and Liability Management Corporation, and the National Transmission Corporation (TransCo).
Following his government service, Mr. Camacho joined Credit Suisse in March 2005 and served as Chief Executive Officer of Credit Suisse Singapore from 2007 to 2016, and later as Vice Chairman for Credit Suisse Asia Pacific. He has held various board and advisory roles, including as a member of the boards of the National Gallery Singapore (2013–2021), the National Heritage Board of Singapore (2007–2013), Sun Life Malaysia Takaful Berhad (2013–2019), and Sun Life Malaysia Assurance Berhad (2013–2022). He also served as a member of the Securities Industry Council of Singapore (2010–2017), the Securities Commission of Malaysia’s International Advisory Group (2008–2010), and the ASEAN Capital Markets Forum’s Group of Experts (2008–2012).
Mr. Camacho is a Founding Member of the Asia Peace and Reconciliation Council (Thailand) and currently serves as an Independent Director of Citadel Pacific Limited and Trans Diversified Group Inc., and is affiliated with SICPA (Switzerland). He previously served as Chairman of Sun Life of Canada (Philippines), Inc.
He obtained his Bachelor’s degree in Mathematics (cum laude) from De La Salle University in 1975 and his Master of Business Administration, with a concentration in Finance, from Harvard University in 1979. In 2017, he was conferred an Honorary Doctorate in Business Administration by Eastern Asia University in Thailand, and in 2021, he was awarded Singapore’s Public Service Medal (Pingat Bakti Masyarakat). In 2025, he participated in training on Mining and Renewable Energy Business, Regulatory, Sustainability, and Risk Management.
Martin Antonio G. Zamora
Executive Director
President and Chief Executive Officer
Martin Antonio G. Zamora
Executive Director
President and Chief Executive Officer
Date First Elected to the Board: June 16, 2010
MARTIN ANTONIO G. ZAMORA is the President and Chief Executive Officer (CEO) of the Company. He is the President of all the Company’s mining subsidiaries. He serves as the Chairman and President and CEO of EPI, as well as the Chairman of EPI’s subsidiaries. He is also Chairman of the Board’s Sustainability Committee and Nominations Committee, and a member of the Finance Committee and the Board Risk Oversight Committee. He is also Chairman of NACFI and RTN Foundation, Inc. (RTNFI).
Prior to joining the Company in 2007, Mr. Zamora was the Philippine Country Manager and a Director of UPC Renewables, a global developer, owner, and operator of wind and solar energy projects. Prior to this, he worked for ten (10) years in finance and investment banking, including with CLSA, Robert Fleming & Co. (UK), Jardine Fleming, and SGV & Co.
Mr. Zamora obtained his Bachelor of Science in Management from Ateneo de Manila University, his Master of Business Administration from London Business School, and his Master in Organizational Psychology from INSEAD. He also participates in extensive trainings on corporate governance, sustainability, ethics and compliance, crisis management, risk management, among others. In 2025, he participated in corporate governance training on Board Responsibilities and Artificial Intelligence, Embracing the Future of Work, and Exploring the Future.
Maria Patricia Z. Riingen
Non-Executive Director
Vice Chairman
Maria Patricia Z. Riingen
Non-Executive Director
Vice Chairman
Date First Elected to the Board: May 20, 2019
MARIA PATRICIA Z. RIINGEN is the Vice Chairman of the Company and a member of the Board’s Corporate Governance Committee. She serves as Chairman of CDTN Services Company Inc. (CDTN), Cagdianao Mining Corporation (CMC), Dinapigue Mining Corporation (DMC), La Costa Shipping and Lighterage Corporation (LCSLC), Nickel Asia Holdings, Inc. (NAHI), Samar Nickel Mining Resources Corporation (SNMRC), Greenlight Renewables Holdings, Inc (GRHI), Casilagan Solar Power Corporation (CSPC), San Antonio Solar Power Corp. (SASPC), Sta. Maria Solar Power Corporation (SMSPC), SanJuan Solar Power Corporation (SSPC), and Tuy Solar and Wind Power Corp. (TSWPC). She is also Vice Chairman and Director of Rio Tuba Nickel Mining Corporation (RTN), Taganito Mining Corporation (TMC), and Hinatuan Mining Corporation (HMC), and a Director of Cordillera Exploration Co., Inc. (CEXCI), Newminco Pacific Mining Corporation (Newminco), Emerging Power, Inc. (EPI), Jobin-SQM Inc. (JSI), Biliran Holdings Inc. (BHI), Mindoro Geothermal Power Corporation (MGPC), National Palawan Power Generation Corporation (NPPGC), Emerging Energy Resources 1 Inc. (EER 1), Emerging Energy Resources 2 Inc. (EER 2), Emerging Energy Resources 3 Inc. (EER 3), and Emerging Energy Saver Corporation (EESC). In addition, she is a Trustee of NAC Foundation, Inc. (NACFI).
Ms. Riingen is the President of Manta Equities Inc. (Manta), Manta Foundation, Inc., and Mantra Resources Corp. She currently serves as Chairperson of the Young Presidents’ Organization Gold Philippines Chapter.
Prior to these roles, she held various leadership positions at The Western Union Company, where she served as Senior Vice President and Regional Head for Asia Pacific. Her earlier experience includes serving as Executive Director and member of the Board of Directors of the Asian Development Bank, Vice President at Citibank, N.A., and Brand Manager at Procter & Gamble.
She has received several recognitions, including being named among Asia’s Top 20 People in Cash Management by FinanceAsia in 2011, in recognition of her influence and leadership in the industry. In 2013, she was included in the list of the 100 Most Influential Filipinas in the World and received the Pinnacle Group CSR Award for her initiatives promoting greater access to financial services in the Philippines.
Ms. Riingen obtained her Bachelor of Science in Business Administration, major in Marketing, magna cum laude, from the University of the Philippines. She also participates in extensive trainings on corporate governance, sustainability, ethics and compliance, crisis management, risk management, among others. In 2025, she participated in corporate governance training on Board Responsibilities and Artificial Intelligence, Embracing the Future of Work, Exploring the Future, Elite Performance Intensive, Turbocharge your Efficiency with Artificial Intelligence, and she also attended the YPO Global Leadership Conference.
Harvey T. Ang
Non-Executive Director
Harvey T. Ang
Non-Executive Director
Date First Elected to the Board: June 3, 2022
MR. HARVEY T. ANG is a Director of the Company and a member of its Finance Committee. He also serves as a Director of EPI, RTN, TMC, CDTN, CMC, DMC, HMC, SNMRC, LCSLC, CEXCI, and Newminco, and is Vice Chairman of NAHI and President of Yeeloofa Development Corporation.
Previously, he held management roles at Exchange Properties Resources Corporation and Solid Mills, Inc. Mr. Ang brings experience across the real estate, textile, logistics, retail, and marketing sectors. He holds a Bachelor of Science in Management from Ateneo de Manila University. He also participates in extensive trainings on corporate governance, sustainability, ethics and compliance, risk management, among others. In 2025, he participated in corporate governance training on Board Responsibilities and Artificial Intelligence, Embracing the Future of Work, and Exploring the Future.
Shiro Imai
Non-Executive Director
Shiro Imai
Non-Executive Director
Date First Elected to the Board: June 30, 2022
SHIRO IMAI is a Director of the Company. He currently serves as General Manager of the Nickel Sales and Raw Materials Department of Sumitomo Metal Mining Co., Ltd. (SMM). He also serves as a Director of Taganito HPAL Nickel Corporation (THNC), Coral Bay Nickel Corporation (CBNC), PT Vale Indonesia Tbk, Hyuga Smelting Co., Ltd., Vale Japan Limited, and Figesbal S.A.
Prior to his current role, Mr. Imai served as President of Sumitomo Metal Mining Philippine Holdings Corp. (SMMPH), CBNC, and THNC from June 2022 to June 2025. He has been with SMM since 1995, holding various roles across its sales and materials divisions. He was assigned to the Sales and Marketing Section of the Electronics Division from April 1995 to January 2001, and subsequently to the Sales and Marketing Section of the Advanced Materials Division from February 2001 to October 2009.
In November 2009, he joined the Nickel Sales and Raw Materials Department of the Non-Ferrous Metals Division, where he served until June 2014, after which he was appointed as SMM’s Chief Representative in its London Office. He later served as Manager of the Copper and Precious Raw Materials Department from June 2016 to September 2019.
Mr. Imai obtained his Bachelor’s degree in Economics from Tohoku University in Miyagi, Japan. He also participates in extensive trainings on corporate governance, sustainability, ethics and compliance, risk management, among others. In 2025, he participated in corporate governance training on Board Responsibilities and Artificial Intelligence, Embracing the Future of Work, and Exploring the Future.

Naoki Kawai
Non-Executive Director

Naoki Kawai
Non-Executive Director
Date First Elected to the Board: July 11, 2025
NAOKI KAWAI is a Director of the Company and serves as Chairman of the Related Party Transactions Committee, and as a member of the Audit Committee and the Nominations Committee. He is the Chairman and President of SMMPH, CBNC, and THNC, effective June 26, 2025. He is also a Qualified Executive of SMM.
Mr. Kawai has been with SMM since 1992 and has held various roles across its operations. His assignments include the Copper and Precious Metals Sales Department (October 2001 to February 2003) and the Nickel Sales and Raw Materials Department (February 2003 to February 2008), both under the Non-Ferrous Metals Division; SMM’s London Office (February 2008 to March 2010); and a secondment to MS Zinc Co., Ltd. (March 2010 to October 2015).
Prior to his current roles, he served as Executive Officer and Senior Deputy General Manager of the Non-Ferrous Metals Division from June 2024 until June 26, 2025. He was also General Manager of the Copper and Precious Metals Sales Department from November 2017 to June 2024, and Manager of the Copper Section of the same department from October 2015 to November 2017.
Mr. Kawai graduated from the School of Education of Waseda University in 1992. In 2025, he participated in corporate governance training on Board Responsibilities and Artificial Intelligence, Embracing the Future of Work, and Exploring the Future, and he also attended training on Mining and Renewable Energy Business, Regulatory, Sustainability, and Risk Management.
Leonides Juan Mariano C. Virata
Non-Executive Director
Leonides Juan Mariano C. Virata
Non-Executive Director
Date First Elected to the Board: June 30, 2022
LEONIDES JUAN MARIANO C. VIRATA is a Director of the Company and a member of the Sustainability Committee. He is the Chief Executive Officer of Cavitex Holdings, Inc. and the Managing Director of MTV Investment Properties.
Prior to these roles, Mr. Virata was part of the Broking Research team of Platinum Securities from 2006 to 2010. He is a member of the Makati Business Club.
Mr. Virata obtained his Bachelor of Arts, major in Philosophy of Religions, from the University of Pennsylvania. He also participates in extensive trainings on corporate governance, sustainability, ethics and compliance, risk management, among others. In 2025, he participated in corporate governance training on Board Responsibilities and Artificial Intelligence, Embracing the Future of Work, and Exploring the Future.
Florencia Gozon Tarriela
Independent Director
Florencia Gozon Tarriela
Independent Director
Date First Elected to the Board: August 04, 2022
FLORENCIA GOZON TARRIELA is the Lead Independent Director of the Company, Chair of the Audit Committee, and a member of the Board Risk Oversight, Related Party Transactions, and Corporate Governance Committees.
Ms. Tarriela currently serves as Board Advisor to Philippine National Bank and LT Group, Inc., and a Director of Gozon Development Corporation. She is also a Trustee of Tulay sa Pag-unlad, Inc. and Philippine Bible Society. She is also a GoNegosyo mentor and a member of the Filipina CEO Circle and the Women Business Council Philippines.
She previously served as Chair and Independent Director of PNB for 15 years, as well as Undersecretary of the Department of Finance. Earlier in her career, she became the first Filipina Vice President of Citibank, N.A., and also served as President of the Bankers Institute of the Philippines and Director of the Bankers Association of the Philippines.
Ms. Tarriela has co-authored and compiled several books on ethics, mentorship, and gardening, among other topics, and continues to be a regular columnist for the Manila Bulletin and BusinessWorld.
She obtained her Bachelor of Science in Business Administration, major in Economics, from the University of the Philippines, and her Master’s degree in Economics from the University of California, Los Angeles. She also participates in extensive trainings on corporate governance, sustainability, ethics and compliance, risk management, among others. In 2025, she participated in corporate governance training on Board Responsibilities and Artificial Intelligence, Embracing the Future of Work, Exploring the Future, and other training on Artificial Intelligence.
James J.K. Hung
Independent Director
James J.K. Hung
Independent Director
Date First Elected to the Board: June 7, 2024
MR. JAMES J.K. HUNG is an Independent Director of the Company and serves as Chairman of the Board Risk Oversight Committee, and as a member of the Audit Committee, Nominations Committee, Related Party Transactions Committee, and Sustainability Committee.
Mr. Hung is the Chairman of Asia Securities Global Group in Hong King since 1993 and ASG Inspiration Laboratory (Singapore) Pte, Ltd. He previously served as Chairman of Asia Securities in Taiwan and as an Independent Director of Security Bank. He has also served as a Director of Franklin Templeton Investment Fund in Luxembourg, Franklin Sealand Fund Management Co. Ltd. in Shanghai, and other international funds.
Mr. Hung obtained his Master’s degree in Business Administration, major in Finance, from Babson College in Massachusetts. In 2025, he participated in corporate governance training on Board Responsibilities and Artificial Intelligence, Embracing the Future of Work, Exploring the Future, and AI-Intelligent, Innovation, Symbiosis.
Manuel B. Zamora, Jr.
Board Advisor
Manuel B. Zamora, Jr.
Board Advisor
Date First Elected to the Board:
Frederick Y. Dy
Board Advisor
Frederick Y. Dy
Board Advisor
Date First Elected to the Board:
Philip T. Ang
Board Advisor
Philip T. Ang
Board Advisor
Date First Elected to the Board:
Officers
Jose Isidro N. Camacho
Chairman of the Board of Directors
Maria Patricia Z. Riingen
Vice Chairman
Martin Antonio G. Zamora
President and Chief Executive Officer
Jose Bayani D. Baylon
Senior Vice President – Sustainability, Risk Management and Corporate Affairs; Chief Sustainability Officer; and Chief Risk Officer
Koichi Ishihara
Senior Vice President – Chief Commercial Officer
Georgina Carolina Y. Martinez
Senior Vice President, Compliance and Corporate Support Services (CCSS), Chief Compliance Officer, Chief Governance Officer, and Assistant Corporate Secretary; Concurrent with: Head, CCSS Shared Services
Romeo T. Tanalgo
Senior Vice President – Chief Security and Aviation Officer
Security and Aviation
Maria Angela G. Villamor
Senior Vice President – Finance; Chief Financial Officer; Treasurer
Andre Mikael L. Dy
Vice President – Finance and Corporate Planning; Deputy Chief Financial Officer
Jeffrey B. Escoto
Vice President – Supply Chain Management and Technical Services
Patrick S. Garcia
Vice President – Internal Audit; Chief Audit Executive
Ryan Rene C. Jornada
Vice President – External Affairs, Regulatory and Community Relations
Ma. Fatima C. Mijares
Vice President, People Transformation and Workplace; Concurrent with: Head, HR Shared Services and Head, Workplace Services
Irene R. Ramos-Salvacion
Vice President – Compliance and Legal; Data Protection Officer
Cynthia E. Rosero
Vice President - Mining Center of Excellence Technical Operations
Joselito G. Calpito
Vice President, Technology Management and Transformation
Atty. Abraham A. Agamata
Assistant Vice President - External Affairs
Bimbo T. Almonte
Assistant Vice President, Health Strategy & Governance; Concurrent with: Head, Health Services
Remedios C. Camo
Assistant Vice President – Mining Compliance
Edwin R. Casiano
Assistant Vice President – Mining Business
Fernando P. Cruz
Assistant Vice President, Mining Controllership Operations
Reynaldo M. Dela Rosa
Assistant Vice President – Community Relations
Christian Jae R. Gascon
Assistant Vice President – Mining Business
Philipp D. Ines
Assistant Vice President – Mining Business
Marnelle A. Jalandoon
Assistant Vice President – Information Technology Services
Melchor C. Mananes
Assistant Vice President – Financial Planning and Analysis
Reynold DG. Mata II
Vice President – Mining Business Support Services
Christine Joanne C. Navarro
Assistant Vice President, Legal Services
Edwin P. Nerva
Assistant Vice President – Sustainability
Iryan Jean U. Padillo
Assistant Vice President – Financial, Tax and External Reporting
Jessie N. Pagaran
Assistant Vice President – Employee, Labor, and Industrial Relations
Teody A. Pascual
Assistant Vice President – Procurement
Jessie A. Payuyo
Assistant Vice President, Mining Finance & Business Performance
Kristine C. Victoria
Assistant Vice President – Geology
Charito R. Villena-Co
Assistant Vice President – Tax Compliance and Advisory
Barbara Anne C. Migallos
Corporate Secretary
Audit Committee
Florencia G. Tarriela (Independent Director)
Chairman
Naoki Kawai
Member
James J.K. Hung (Independent Director)
Member
Board Risk Oversight Committee
James J.K. Hung (Independent Director)
Chairman
Florencia G. Tarriela (Independent Director)
Member
Martin Antonio G. Zamora
Member
Corporate Governance Committee
Jose Isidro N. Camacho
Chairman
Florencia G. Tarriela (Independent Director)
Member
Maria Patricia Z. Riingen
Member
Nominations Committee
Martin Antonio G. Zamora
Chairman
James J.K. Hung (Independent Director)
Member
Naoki Kawai
Member
Finance Committee
Jose Isidro N. Camacho
Chairman
Martin Antonio G. Zamora
Member
Harvey T. Ang
Member
Sustainability Committee
Martin Antonio G. Zamora
Chairman
James J.K. Hung (Independent Director)
Member
Leonides Juan Mariano C. Virata
Member
Rio Tuba Nickel Mining Corporation
Cynthia E. Rosero
SVP - Chief Operating Officer
Jessie A. Payuyo
Mining Comptroller
Ronellbert A. Suguitan
VP – Resident Mine Manager
Cagdianao Mining Corporation
Artemio E. Valeroso
SVP – Chief Operating Officer
Jessie A. Payuyo
AVP – Mining Comptroller
Engr. Christian Jae R. Gascon
Resident Mine Manager
Cordillera Exploration Co., Inc.
Graciano P. Yumul, Jr.
President
Dinapigue Mining Corporation
Francisco J. Arañes, Jr.
SVP – Chief Operating Officer
Jessie A. Payuyo
AVP – Mining Comptroller
Edwin R. Casiano
Resident Mine Manager
Hinatuan Mining Corporation – Manicani Nickel Project
Philipp D. Ines
Vice President; Resident Mine Manager
Fernando P. Cruz
AVP – Mining Comptroller
Hinatuan Mining Corporation - Taganaan Nickel Project
Francisco J. Arañes, Jr.
SVP – Chief Operating Officer and Resident Mine Manager
Fernando P. Cruz
AVP – Mining Comptroller
Newminco Pacific Mining Corporation
Graciano P. Yumul, Jr.
President
Jessie A. Payuyo
AVP - Finance
Taganito Mining Corporation
Artemio E. Valeroso
SVP – Chief Operating Officer and Resident Mine Manager
Fernando P. Cruz
AVP – Mining Comptroller
