Lockheed Martin Corp. extended its lease at Three Flint Hill located at 3201 Jermantown Road, in Fairfax, VA. Lockheed Martin will continue to occupy the entire building totaling 160,650 square feet. Flint Hill Office Park is a 48-acre office park located at I-66 and Route 123 and is fully leased with over 500,000 square feet in three buildings. Jeffrey K. Diamond and Brian F. Tucker of Diamond Property Co. of McLean represented the owner, Three Flint Hill R.L.L.P. Jeffrey Y. Flynn and Matthew M. Sonne of Spaulding & Slye Colliers International of Washington, D.C. represented Lockheed Martin.