Wachtler Knopft Equities LLC said Fay, Spofford & Thorndike (FST) of New York, Inc. has leased 3,774 s/f of office space at 500 Bicounty Corporate Plaza. FST, a national engineering and planning firm based in Burlington, Mass., provides engineering and planning services for Fortune 500 companies and various corporate clients. FST recently moved into its new quarters. Ralph Benzakein of Whitman Realty Group Inc., Melville, represented FST in arranging the lease. Philip Wachtler, principal of Farmingdale-based Wachtler Knopf Equities LLC, leasing and managing agent for the building, represented the landlord, an affiliate of Great Neck-based Sterling Equities. WKE also completed two other transactions at 500 BiCounty Corporate Plaza: * Admit Computer Services Inc., a developer of software used by police departments, first responders, court systems and municipal governments, renewed its lease for 5,502 s/f through 2013. The company uses the space for its corporate headquarters. * Cort Furniture Rental subleased 2,000 s/f from Liberty Mutual Insurance Co. for a showroom. Cort, a Berkshire Hathaway company, is based in Fairfax, Va. The 500 Bicounty property is one of the largest privately owned office complexes in the town of Babylon with 149,000 s/f. Ideally located just off Rte. 110, near major highways, it is close to Republic Airport, hotels, shopping, bus routes and the Long Island Railroad's Farmingdale station.