From The Capital Beltway (I-95 & I-495):
Take exit 11-B
Turn Left at the first light (Forestville Rd)
Turn Right after the Shell gas station (Stewart Rd)
SPX Building is on your left.
From Joint Base Andrews:
Exit the Main Gate
Turn Right on Allentown Road
Turn Left on Forestville Road
Continue straight across Suitland Parkway
Turn Left immediately before the Shell gas station (Stewart Road)
SPX Building is on your left.