Principal and Director
san francisco, california, united states
Langan Treadwell Rollo
Principal and Director
Langan Engineering & Environmental Services
Senior Consultant and Chair of the Board
Geomatrix Consultants
Principal and Director
Langan Engineering & Environmental Services
Director of Western Operations
Langan Engineering & Environmental Services
Senior Consultant and Chair Emeritus
Langan Treadwell Rollo
President
Langan Engineering & Environmental Services
Senior Consultant and Director
Woodward Clyde Consultants
Senior Project Engineer
Drexel University
University of California, Berkeley
