David Voegtle is GMF’s development coordinator for government funding. Before joining GMF, he served as the external affairs officer for Charities Aid Foundation America (CAF America), a nonprofit specializing in the facilitation of donor-advised grants to charities worldwide. He managed the organization’s international grantmaking partnership and disaster response programs. Voegtle’s efforts raised $33 million for charities responding to the 2021 floods in Germany’s Rhineland, Russia’s 2022 invasion of Ukraine, and the 2023 earthquake in Turkey.

Prior to entering the nonprofit sector, Voegtle served as a staffer for a major US gubernatorial campaign and for a congressional fundraising firm. He is a 2017 graduate of Rhodes College, where he studied political science with a concentration in political philosophy. He speaks Spanish and German.

Gillian Ziegler is GMF's alumni relations coordinator and helps to engage the more than 4,000 alumni of GMF's leadership programs. He manages the alumni database and coordinates the alumni relations office's outreach and engagement activities with GMF’s development team.

Prior to joining GMF, Ziegler worked at the Silverado Policy Accelerator, a nonprofit, bipartisan policy organization dedicated to solving geopolitical challenges in trade and industrial security, economic and ecological security, and cybersecurity. He was also a researcher at the University of Notre Dame, focusing on religion and right-wing political parties in Central Europe. From 2015 to 2017 he served as a Peace Corps volunteer in Tanzania.

Ziegler holds a master's degree in international relations from Tufts University’s Fletcher School of Law and Diplomacy and a bachelor's degree in history from Goucher College.