Prior to joining X1, CEO John Waller acted as managing director of the New Ventures Group for Idealab. John founded Green Thumb Ventures, an incubator and investment company that funds and develops seed-level Internet and technology enterprises. John also co-founded Resume.com, where he served as CEO and president. At Resume.com, he developed strategic partnerships and negotiated the sale of the company to Adecco S.A., the largest staffing company in the world. Before starting Resume.com, John co-founded Interactive Imaginations, the predecessor to 24/7 Real Media.

John began his career on Wall Street, joining Bull and Bear in New York City. He received his undergraduate degree from the University of Southern California and his MBA from the Anderson School at UCLA.

John is a frequent guest speaker and panelist at seminars, conferences, and universities, speaking on the topics of entrepreneurship, venture capital, and angel investing.