Marc Zionts serves as the Chief Executive Officer of SundaySky. Having joined the company in 2024, Marc brings over 30 years of experience in building technology and software companies in high-growth markets. He has worked closely with investors to develop and implement value-creation plans aimed at driving growth and EBITDA. Marc is dedicated to leading SundaySky into its next phase of growth and development.

Having built an extensive international career, Marc has dedicated significant time to various countries, particularly Israel, India, Japan, and China. Previously, Marc served in executive positions at Synacor, Precision Nutrition, Automated Insights, Numerex (acquired by Sierra Wireless), Aicent (sold to Syniverse), and more. 

Beyond his executive role, Marc is an environmentalist, outdoorsman, and avid athlete. He serves as a Board Director, Treasurer, Finance Committee Chairman, and Development Committee Chairman at Friends of the Earth, a Washington, D.C.-based environmental justice group. Marc enjoys spending time with his wife of over 33 years and his four adult children.

Marc earned his Bachelor’s and Master’s degrees from the Georgia Institute of Technology.