USEC Domingo holds a Master’s Degree in Philippine External Relations, a Master’s Degree in National Security Administration, and a PhD in Criminology. He also holds a Bachelor of Science in Foreign Service from the Georgetown University School of Foreign Service, and a Master of Laws in International Law of Armed Conflict from the Geneva Academy of International Humanitarian Law and Human Rights.

In the practice of his profession, Domingo holds experience as the former Philippine Ambassador to New Zealand, with concurrent accreditation in the Cook Islands, Fiji, Samoa, Tonga, and the Pacific Island Forum. He is also the former DFA Assistant Secretary for UN Affairs and other International Organizations, representing the Philippines in the UN Security Council, the UN General Assembly, the Conference on Disarmament (CD), and UN Disarmament, Non-Proliferation and Humanitarian Conventions, among others. Finally, Domingo is the former head of Assistance to Nationals (ATN) at the Philippine Embassy in Riyadh, Saudi Arabia.

He is a reservist with the Philippine Marine Corps and Coast Guard Auxiliary. He also founded the Diplomatic League, the DFA’s Youth Engagement Platform.