Brian Crimmins is a global leader in social impact, a popular public speaker with the world’s foremost speaking agency, the Washington Speakers Bureau, and the former Chief Executive Officer of Changing Our World, where he spent more than 22 years advising clients and nearly 14 leading the firm.  

During his tenure as CEO of Changing Our World, Brian steered the firm toward greater collaboration with its sister agencies from across Omnicom’s portfolio of brands; launched and was host of the firm’s popular virtual conference series, Forging Forward; co-authored a best-selling book, The Generosity Crisis: The Case for Radical Connection to Solve Humanity’s Greatest Challenges, released November 2022, which reflects Changing Our World’s longstanding orientation toward connection-centric fundraising; and was continually hands-on in client engagements across sectors. Brian also served as a purpose leader within Changing Our World’s parent company, Omnicom, helping it to understand the community impact of more than 200 agencies across its network and advancing its commitment to the SDGs. His expertise was tapped in service to some of the world’s largest and most influential brands. 

Brian joined Chaminade High School (NY) in October 2023 as its first-ever Chief Operating Officer. 

He holds a Bachelor of Science from St. John’s University and an MBA in Marketing Management from St. John’s Tobin School of Business. He lives on Long Island with his wife and their four children.