Greg Johnston

Greg Johnston, CFP, EIT

Senior Fisheries biologist

Greg applies his expertise in fisheries biology towards evaluating and improving habitats to maximize salmonid productivity. His background in civil engineering as well as in fisheries biology enables him to integrate physical and biological components of productive riparian communities. A senior member of Watershed’s natural resources department, having joined the firm in 1987, Greg regularly works with our landscape architecture team to develop fish habitat-friendly restoration designs for parks and infrastructure-related improvements.

Outside of Watershed
Greg serves on the Stillaguamish Watershed Council’s Technical Advisory Committee in his home basin, where he helps decide how to best improve habitat limiting factors for salmon with available resources. A high point was a couple of days volunteering for the Stillaguamish Tribe in helping to capture wild Chinook salmon from the Stillaguamish River to serve as brood stock for their hatchery supplementation program. 

Greg also works as a hobby farmer on his acreage near Arlington where he has a horse, several steers, a big garden, and cuts a lot of firewood.  These activities keep him from hiking as much as he’d like on nearby Three Fingers, Pilchuck, and the lower slopes of Baker.  His family maintains a near-100-year-old cabin near Poulsbo, inherited from grandparents, which is the location of frequent get-togethers.


  • MS, Fisheries Biology, University of Washington, 1984
  • BS, Civil Engineering, University of Washington, 1979


  • Certified Fisheries Professional (CFP), American Fisheries Society
  • Engineer-in-Training (EIT), Washington