Logan Simpson is a natural resource-based environmental planning, community planning, and landscape architecture firm headquartered in Tempe, Arizona. We serve clients throughout the West and as far away as Alaska. Logan Simpson offers a wide range of services that include NEPA planning, biology, cultural resources, Clean Water Act permitting, visual resource analysis, community planning, and landscape architecture, and has a broad portfolio of projects for local, state, tribal, federal agencies, private developers, and energy providers.