Dan Rosen is the Managing Director of Commerce Ventures. He was most recently an investor with Highland Capital Partners. Prior to joining Highland in 2006, Rosen worked at RSA Security (corp dev), HarbourVest Partners (associate) and American Management Systems (biz analyst). He is expected to continue representing Highland on the boards of several portfolio companies. Rosen's Highland deals have included Optasite (sold to SBA Communications), Quattro Wireless (sold to Apple), Picochip, PerkStreet Financial, Triad Communications and Zoove.