Gordon Conway is director of agriculture for Impact and a professor of international development at Imperial College London. Gordon was chief scientific adviser to the Department for International Development from 2005 to 2009. Previously he was president of The Rockefeller Foundation and vice-chancellor of the University of Sussex.

Dr. Gottfried Hirnschall is the director of the HIV/AIDS Department and the Global Hepatitis Program of the World Health Organization. He leads the organization's work in development and implementation of cutting-edge normative policies and guidance, and of technical support to countries to scale up national responses to HIV and Hepatitis. As of December 2013, he oversees the Global Hepatitis Program which coordinates the organization’s response to viral hepatitis.

Grace Hollister is responsible for strategic management and technical oversight of Evidence Action’s Deworm the World Initiative. She also works with a variety of partners to expand opportunities for school-based deworming programs globally.

Graham Glenday is professor of the practice of public policy at the Duke Center for International Development at Duke University’s Sanford School of Public Policy. He came to Duke in July 2001 from Harvard University, where he was director of the Public Finance Group in the Kennedy School of Government and earlier in the Harvard Institute for International Development. He has over 25 years of international professional experience in public finance, acting as an advisor in tax policy reform, public investment management and other fiscal matters to over 30 countries.

Grainne Moloney is a senior adviser at the UNICEF headquarters in New York on early childhood nutrition. There she leads on breastfeeding, complementary feeding, and micronutrient deficiencies. With over 20 years of experience, Grainne previously worked in the UNICEF East and southern Africa regional office on prevention and treatment of wasting, and nutrition in emergencies, supporting 21 countries as the chief of nutrition with UNICEF Kenya.

Gráinne de Búrca is a Florence Ellinwood Allen professor of law at New York University and co-director of NYU’s Jean Monnet Center on International and Regional Economic Law and Justice.

Grania Brigden is the TB and AMR adviser for Médecins Sans Frontières' Access Campaign. She has been based in Geneva, Switzerland since 2011. She worked with the National Health Service and VSO. She is committed to improving TB and drug-resistant infection treatments.

Grant is an associate at global marketing communications agency Ogilvy & Mather. He is currently exploring the power of marketing to affect social change as part of his work at OgilvyEarth, a division of the Ogilvy network that builds and markets sustainable brands.

Greg Adamson is an associate professor at the Melbourne School of Engineering, University of Melbourne, Australia. He is also an IEEE senior member and chairs the IEEE Special Interest Group on Blockchain.

Greg Foster had been the vice president for Habitat for Humanity's Africa and the Middle East area since 2008 and became vice president of the expanded area office when it merged with the Europe and Central Asia office in January 2013. Before Habitat for Humanity, Foster spent seven years in Tanzania, where he managed a microfinance institution on behalf of the Canadian International Development Agency and developed the Tanzania Ministry of Health’s malaria prevention project, funded by the Global Fund and World Bank. He also worked in Jordan, Iraq and Bangladesh.