Chris Crooks, Daniel Sullivan, and Adam Subber of CresaPartners in Boston - a corporate real estate firm specializing in tenant representation - recently represented Zipcar in a 21,122 s/f lease at 25 First St. The transaction was one of the largest in Cambridge in the first quarter. Zipcar, one of the world's largest car sharing companies, is expanding its corporate headquarters by 12,931 s/f on the fourth floor of the 220,000 s/f standalone building. The expansion allows Zipcar to better accommodate its current work force while preparing for its second straight year of 100% employee growth. Deb Gould of Cushman & Wakefield and John Caldwell of Paradigm represented the landlord, AEW. CresaPartners in Boston is one of New England's largest corporate real estate advisory firms specializing in tenant representation and corporate services, including project management. Worldwide, the firm provides services through more than 125 offices in 35 countries, including 47 North American CresaPartners locations.