Dan began his career as an engineer for Sundstrand Corporation, a major manufacturer of aviation systems. In 1988, Rick Sontag hired Dan to serve in a marketing role at Unison Industries and helped grow Unison from a small operation to a corporation with 1,500 employees and worldwide sales of $200 million. Dan held numerous senior positions at Unison, including VP Marketing and VP Operations. After Unison was sold to General Electric, Dan joined Rick at the Sontag Foundation and helped form the venture capital operations of the Spring Bay Companies. Dan also serves as a board member of The Brain Tumor Network and a member of The Sontag Foundation Investment Advisory Board.