Brenna Simmons-St. Onge

Pronouns: she/her

Brenna Simmons-St. Onge is the executive director of The Alliance for Collective Action. She has been with the organization since 2015 and was promoted from within. She is a pragmatic visionary with over 19 years of leadership experience, including a decade in Corporate Social Responsibility. Brenna has successfully managed multimillion dollar budgets and led teams from 9-200. As a dynamic change agent, Brenna leads with a nonprofit heart and a business mind leveraging holistic approaches to implement and scale solutions to some of the largest issues humanity faces. 

She has received numerous awards over her career. She was named one of the top 25 Most Influential Young Professionals in 2015, the City of Denver’s Community Builder Sustainability Award in 2017, and Outstanding Women in Business in 2023 by Denver Business Journal. Brenna has a Bachelor’s of Business Administration, as well as a certificate in Environmental Sciences from University of Hawaii, and is a Certified Fundraising Professional from The Indiana School of Philanthropy.