Directions to Northrop Grumman Corporation, Bethpage NY 11714 From Belt Parkway Belt Parkway EAST; continue, as it becomes Southern State Parkway east (Long Island). Continue east on Southern State Parkway to exit 28, North (Wantagh Avenue). Wantagh Avenue turns into Route 107. Continue until the road forks (Route 107 goes to the left and South Oyster Bay Road is to the right), stay to your right. Continue approx. 1 mile on South Oyster Bay road to the first traffic light (Hazel Street on left/Grumman Road on right). Turn right (Grumman Road West) into the parking lot of Building 25. Proceed to Visitors Parking Lot - Bldg. 25 will be on your left. It will be necessary to present identification upon entering our reception lobby. From Grand Central Parkway Grand Central Parkway EAST. Exit onto I 495, the Long Island Expressway - East. Continue on I 495 to Exit 43, South Oyster Bay Road. Take South Oyster Bay Road South for approximately four miles, passing Woodbury Road, Old Country Road, and Stewart Avenue intersections. After Stewart Avenue intersection, cross railroad tracks, first light is Hazel Street on right Grumman Road on left. Turn left into Grumman Road and make the second right into the parking lot. Building 25 is on the left as you enter parking lot. From Long Island Expressway From Long Island Expressway WEST to Route 135 exit SOUTH. Get off OLD COUNTRY ROAD exit and make a right turn onto Old Country Road. Take this to SOUTH OYSTER BAY ROAD. Make a left onto South Oyster Bay Road. Continue for approximately 1 1/2 - 2 miles. After the large building on your left "Bethpage Federal Credit Union" the road will fork - stay to the right. Go over the railroad tracks and at the first traffic light (GRUMMAN ROAD) make a left turn, follow the road around to the second right, building 25 is on the left as you enter parking lot; go inside, a guard is sitting in the lobby. .