Peter Caldwell ASLA, PLA is a landscape architect at Asakura Robinson in Houston, Texas, and he has an educational background in Ecological Sciences and Engineering. His work focuses on barrier-free solutions through an ecological design lens. He is a leader in his professional organization (ASLA) where he brings innovative educational opportunities to the state and local membership.landscape architect at Asakura Robinson in Houston, Texas, and he has an educational background in Ecological Sciences and Engineering. His work focuses on barrier-free solutions through an ecological design lens. He is a leader in his professional organization (ASLA) where he brings innovative educational opportunities to the state and local membership.