NAPERVILLE, ILL. — The Staubach Company has represented Hallmark Services Corp. in the long-term leasing of 256,766 square feet within Naperville Woods Office Center at 1000-1100 E. Warrenville Rd. in Naperville. Hallmark will utilize the space as its headquarters and for call center operations. It expects to occupy the new space by the end of the year, vacating approximately 150,000 square feet of office space in Aurora, Ill. Andrea Van Gelder Diana Rieske, Michael Sessa and Jock Howland of Staubach represented Hallmark in the transaction. Brian Whiting of JF McKinney & Associates represented the landlord, M&J Wilkow.