Warren serves as Vice Chair of the Board of Managers and as a Director of the Illinois Emerging Technologies Fund.  He is a partner at The Tokarz Group, LLC, a private, New York-based merchant bank and is a member of the Board of Directors and Co-Head of Portfolio Management for its MVC Capital Fund (NYSE:MVC), where he sources and executes new investments and helps manage the Fund's global portfolio of private equity, venture, and small and mid cap debt and equity investments across a broad range of industries including technology, consumer/retail, energy and finance.

Previously, Mr. Holtsberg founded Motorola Ventures, the venture capital investment arm for Motorola, Inc. (NYSE:MOT) where he led the worldwide fund for eight years. Before Motorola, Mr. Holtsberg spent two decades with the U.S. Government where he held a number of senior executive positions in the Aviation, Defense and Intelligence communities. Mr. Holtsberg is also a member of the Board of Directors of the Illinois Venture Capital Association and the Chicagoland Entrepreneurship Center.  Mr. Holtsberg is a graduate of the University of Illinois and the Kellogg Management Institute at Northwestern University J.L. Kellogg Graduate School of Management.