From Hwy 41, exit the Herndon off-ramp and head East on Herndon to Willow Ave. (about 3 miles). Go north on Willow Avenue to Perrin Avenue (about 2.5 miles) or (0.5 miles north of Shepherd). Turn Left (West) on Perrin to small Office Complex on the south side (0.4 miles), and turn into the first driveway. Office #108 is the corner office at the southeast corner of the 2995 E. Perrin Building.