Ambassador Lorenzo is the Honorary President of South-South News, an initiative launched during the Sixteenth Session of the High Level Committee on South-South Cooperation at the United Nations in New York to advance the implementation of the Millennium Development Goals, through the sharing of best practices in the area of South-South and triangular cooperation. South-South News is a platform for showcasing programmes and building capacity in the field of e-governance, education, health, transfer of technology, renewable energy, food security, climate change, and sustainable development.
Ambassador Lorenzo served as the chair of the MDG Awards Committee, through which the presidents of the 62nd and 63rd session of the General Assembly, as well as the Prime Minister of Antigua and Barbuda and Archbishop Desmond Tutu have received awards. Ambassador Lorenzo is also an alternate Ambassador of the Dominican Republic to the United Nations, and worked with the UN Public-Private Alliance for Rural Development and the UN Economic and Social Council to negotiate the resolution that named the Dominican Republic as the second pilot country for the UN Alliance. Recognizing the importance of partnerships for development, Ambassador Lorenzo served as the facilitator for the resolution towards global partnership at the UN.

Ambassador Lorenzo was the former Vice President of the Commission for Social Development and is the current Vice President of the United Nations Association of the Dominican Republic (UNA-DR), which has brought together key stakeholders in the country. Under the leadership of President Dr. Leonel Fernandez, the Dominican Republic is the only country using Model UN in its public schools.