Department: Leadership Team

Heidi Overbeck

As chief strategy officer, Heidi Overbeck leads the programs and communications teams at the Gill Foundation in setting and executing against foundation priorities and identifying breakthrough investment opportunities to secure full equality for LGBT Americans. Heidi joined the foundation in 2018 as the vice president of communications and moved into the role of chief strategy officer in January 2020.

Previously, Heidi was a vice president at BerlinRosen, one of the nation’s leading social impact and issue advocacy PR firms, where she served as a senior communications strategist to movement leaders on LGBT rights, women’s rights, immigrant rights, and public health. Her prior experience includes leading national communications campaigns at Fenton, directing voter outreach for U.S. Congresswoman Chellie Pingree, serving as a legislative aide in Maine’s state legislature, and running the preservation program at Environment Maine.

Heidi serves on the board of the Movement Advancement Project and previously served on the boards of the Women’s Information Network of New York City, Emerge New Jersey, and Emerge Maine. She was also selected to be a creative writing mentor with Girls Write Now, a New York City nonprofit supporting underserved high school girls in finding their voices and sharing their stories through creative writing.

Heidi graduated magna cum laude from Colorado College, where she earned a degree in English with an emphasis in creative writing. Born and raised in Colorado’s Roaring Fork Valley, Heidi now lives in Denver with her family.

Brad Clark

Brad Clark is the president & CEO at the Gill Foundation. He joined the foundation in 2015 as the vice president of partnerships and moved into the role of president & CEO in January 2018. In this role, Brad leads the foundation in executing the vision of Tim Gill and the board through prioritizing, implementing, and measuring the work and grant-making of the foundation.

Brad began his career in Iowa. His previous experience was as campaign director of One Iowa where he built a coalition of nearly 100 allied organizations representing more than 200,000 Iowans and built a grassroots infrastructure of more than 12,500 members and 33,000 identified supporters. As well as leading One Iowa’s successful marriage equality campaign, Brad’s accomplishments include a successful safe schools campaign. As the executive director of Iowa Safe Schools, he led a coalition of education, civil rights, labor, faith, and business leaders to help pass a comprehensive safe schools law and civil rights law to protect LGBT Iowans from discrimination.

In addition, Brad developed One Colorado as its first executive director. Under his leadership, One Colorado built a coalition of more than one million Coloradans to pass a civil unions law, launched a nationally recognized organizing project with the Colorado Immigrant Rights Coalition, passed a comprehensive anti-bullying law and helped ensure more than 150,000 students can access a gay-straight alliance, and added protections for transgender Coloradans to access health insurance.

Prior to the foundation, Brad developed the Human Rights Campaign’s Project One America. He led a cross-organizational effort to dramatically expand equality and bridge the divide that exists for many LGBT Americans through a deep and lasting investment to change hearts and minds, advance enduring legal protections, and build more inclusive institutions for LGBT people from the church pew to the workplace. He led a highly collaborative program, integrating HRC’s political and advocacy work, communications and membership campaigns, and HRC Foundation programs into an exciting new push for equality everywhere, for everyone.

Penny Hamilton

As chief operating officer, Penny Hamilton manages the finance and accounting services for the foundation. This role includes financial reporting, investment analysis, cash management, budgeting, payroll, human resources, benefits administration, and regulatory compliance. Her responsibilities also extend to overseeing grants data management, IT services, office management, and facilities.

Originally from Wisconsin, Penny studied at the University of Wisconsin-Eau Claire and received a bachelor’s degree in business administration with a minor in mathematics from the University of Wisconsin-River Falls. She started her career in accounting after moving to Denver in 1994 and has developed a broad range of accounting and managerial experience covering private, public, and nonprofit organizations. Prior to joining the foundation, she served for seven years as the CFO to Griffith Centers for Children, a nonprofit organization serving at-risk youth and their families throughout Colorado. Penny earned her master’s degree from the University of Colorado Denver in 2012.

Jeff Criteser

As vice president of partnerships, Jeff Criteser is responsible for bringing more investment into the movement for lesbian, gay, bisexual, and transgender equality. By engaging and supporting individual and institutional donors who want to make more effective and strategic gifts, Jeff leverages new and increased investments for key initiatives, collaborations, and grantees.

Prior to joining the foundation, Jeff worked as an account executive at a leading Washington D.C. fundraising firm. Jeff was responsible for creating and implementing tailor-made fundraising strategies to meet the financial and organizational goals of progressive nonprofit groups. He also assisted with the organization and staffing of major donor events, including the 2012 Democratic National Convention and 2013 Presidential Inauguration.

In his home state of Michigan, Jeff served in senior roles on campaigns for Michigan Attorney General, a nationally targeted state Senate race, and as an aide in the state legislature.

Jeff is proud to be a member of the Gill Foundation, an organization he has long respected, and is committed to advancing the cause of equality across the nation.