He was known for founding software company BSO/Origin,[2] co-founding Ex'pression College,[3] and contributing to the success of Ben & Jerry's Benelux,[4][5] Wired,[5] and Greenwheels.

The firm's clients included Volvo, Texaco, Eastman Kodak, Procter & Gamble, and Motorola.

[2] In 1996, the company merged with Philips Communications and Processing Services, and ready to move on to other ventures, Wintzen chose not to stay onboard after the merger.

He founded green venture capital firm Ex'tent,[7] which offered management and financial support to small companies with philanthropic missions.

[6] Eckart advised many entrepreneurs, and served on the boards of commercial and non-profit organizations including the Dianne Fossey Gorilla Fund and the Carbon Disclosure Project.