Making Sustainability Possible:

Since 1982

Environmental Science, Land Use, & Mitigation 

Environmental Science

Wetlands| Shorelines | Habitat | Storm Water Inspections

Land Use

Feasibility| Permitting| Project Management | CESCL


Planting | Installation| Monitoring | Maintenance | Stormwater Inspections and Mainteance

What some of our great clients have to say about us

The team at ATSI is great to work with and they have done a very detailed and professional job. Karla is extremely experienced in this field.

– Jason Ragsdale, Pres.

ATSI has a staff of hard-working professionals who bring expertise and dedication to their jobs. They are a pleasure to work with and can always be relied upon to do an excellent job.

– Board of Directors



Since 1988, we have served over 1,750 clients on over 40,500 acres of public and private land through local, state, and federal biological permitting and consultation processes. We assess biological critical areas on tracts greater than 1,000 acres and parcels less than 1 acre for large and small development projects, including commercial, residential, and public facilities.

Our general service areas include Whatcom, Skagit, Island, San Juan, Snohomish, and King counties, with clients in the greater Washington area, Alaska, and Canada. In addition, we consult with local jurisdictions including Anacortes, Arlington, Bellingham, Blaine, Burlington, Ferndale, Lynden, Mount Vernon, Nooksack, Sedro-Woolley, Hamilton, and Point Roberts, state agencies including Ecology and WDFW, federal agencies including Corps, USFWS, USEPA, and NOAA, and sovereign nations including the Upper Skagit, Nooksack, and Lummi Native Tribes.