Mack-Cali arranges four leases totaling 73,486 s/f

Mack-Cali Realty Corporation has completed four lease transactions totaling 73,486 s/f. * Montefiore Medical Center signed two new 10-year leases totaling 29,850 s/f at South Westchester Executive Park. The transactions consist of leases for 16,650 s/f at 200 Corporate Blvd. South and 13,200 s/f at 6 Executive Plaza. Mack-Cali was represented in-house by Carol McGuire, senior director of leasing.   * JPMorgan Chase Bank, National Association signed a five-year renewal for 15,880 s/f at 11 Martine Ave., White Plains. Mack-Cali was represented in-house by McGuire.   * National Union Fire Insurance Company signed a five-year renewal for 14,056 s/f at 555 Taxter Rd., Elmsford.  Glenn Walsh, Joe Sarno and Jeremy Neuer of Cushman & Wakefield represented the tenant and McGuire represented Mack-Cali. * Mrs. Green's Natural Market, Inc. signed a new 10-year lease for 13,700 s/f at 300 Executive Blvd., Elmsford. Richard Leroy of Delphi Commercial Properties represented the tenant. Mack-Cali was represented in-house by Ivan Abry, senior director of leasing.