From I-66

Take Exit 55 Fairfax County Parkway North (Rt. 7100 North)

Take a RIGHT at the first traffic signal onto Fair Lakes Parkway

Take a RIGHT at the first traffic signal onto Fair Lakes Circle

Approximately .5 miles, turn LEFT into the parking access road at 12701 Fair Lakes Circle. The Argon ST building is to the left, across from the Hyatt

From Dulles International Airport

Follow the airport access road to VA Rt. 28 exit 9, towards Sterling (VA-7)/Centreville(US-50).

Keep RIGHT at the fork in the ramp. Merge onto SULLY RD/VA-28 SOUTH.

Follow VA-28 to the exit for Rt. 50. Stay LEFT off of the exit to merge onto Rt. 50 EAST.

Continue on Rt. 50 for several miles, then take the Fairfax County Parkway SOUTH (Rt. 7100 South).

Take the first RIGHT onto Fair Lakes Parkway.

Take the second LEFT at the second traffic signal onto Fair Lakes Circle.

Take the second RIGHT into the parking access road, at 12701 Fair Lakes Circle. The Argon ST building is to the left, across from the Hyatt.

From Washington Reagan National Airport

Follow the signs leaving Terminals B/C area to Washington DC/I-395 to I-66.

Merge onto George Washington Memorial Pkwy NORTH.

Bear RIGHT onto the I-395 SOUTH ramp, following the signs to I-66 WEST / VA Rt. 110 NORTH.

Take VA 110 NORTH exit to Rosslyn, following the signs to I-66 WEST.

Merge onto I-66 WEST. Follow the I-66 directions from above.