John Costello

John Costello is the Chair Emeritus at MMA Global and a former Co-Chair of the Board of Directors at the Grand Teton Music Festival. John has also served as the Secretary and Chair of the Governance Committee, Strategic Planning Committee, and Artistic Planning and Audience Development Committee at the Festival.

Costello has over 20 years of experience in the marketing and venture capital industries. John is the founder of Costello Ventures, a venture capital firm, and was previously the CEO of Silicon Couloir, a nonprofit organization that supports entrepreneurship in Wyoming. John also served as the CEO of UNTUCKit, a men's apparel company, and as the President and CEO of Momentous, an insurance company.