(800) 463-3455 (voice)
(301) 220-2483 (fax)

G&O is a multi-disciplinary design firm providing civil engineering, environmental, hazardous waste, transportation, traffic, structural, historic preservation, archeology, wetlands, wildlife, water quality, surveying, and mapping/GIS consulting.

G&O has offices in Northern Virginia/Maryland, Harrisburg, Raleigh, Atlanta, Palm Beach, Tampa, and Denver.

We offer FREE Intergraph/CADD and ARC/Info Macros!