Board of Directors

Guy Sievert


Guy is originally from upstate New York having come to Oregon in 1983 from West Virginia. He held faculty and administrative appointments in colleges and universities for nearly forty years before starting with his partners Ecosystem Services LLC, a group dedicated to using capital markets to protect our watersheds. He is currently managing partner in Ecosystem Services, a consulting team focused on source water protection. Guy lives with his wife Donna in Neskowin and has been an active volunteer in various Tillamook County committee’s and task forces. He is currently a member of the county Planning Commission.

Mike Trent


Mike has been a dairy farmer his whole life on Trent Family Farms in Cloverdale, which has been in the family since 1928. Mike joined the Watershed Council in December of 2016, and is interested in protecting the overall health of our local watersheds. He partnered with the Watershed Council to do culvert replacements and riparian restoration on his own property, and is an avid hunter and fisherman.

Guy Holzworth


Guy has lived in the area for 36 years, and managed the Neskowin Regional Water District for 35 of those. He has a tremendous interest in nature and water in the region, and joined the Watershed Council for the opportunity to collaborate with local governments, entities, non-profits, partnerships and landowners to do amazing things.

Sherry Vick

Sherry lives in Hemlock and works for the Tillamook County Soil & Water Conservation District. She is an active gardener with a backyard flock of chickens. She likes to camp, bike, hike, fish, bird, rock hound and beachcomb. She is very interested in the natural history of this area that she lives and works in. Volunteering her time for our local watershed council seems like a natural way to give back to this area that she enjoys so much.

Mike Walsh

Mike has been involved with the Watershed Council from the beginning. He is a retired school teacher of the Nestucca Valley School District, and for a number years taught a Natural Resources class, where they had many outings studying the environment and assisting on many restoration projects within the county. He enjoys landscaping on his property that lies adjacent to the Nestucca River. Mike spends much of his time working with the Civil Air Patrol which he has been committed to for 12 years.

David Zine

David Zine was born and raised in Montana but has been an Oregon resident since 1969.  He began visiting the area in 1973, and David and his wife Marlise have had a home in the Tierra Del Mar and Sand Lake community since 1980. David is the chief financial officer of Gallatin Cascade Inc., an Oregon communication management company. He has also been an officer of numerous non-profit organizations. He is interested and active in local environmental issues and loves local lore and history. David can frequently be found canoeing the local rivers and estuaries and exploring area trails.

Jon Warren

I moved to Oregon from Los Angeles in the early 70s at the age of 22.  I went to work in the hi tech industry that was in its beginnings here in Oregon.  I worked nights to complete a degree in manufacturing technology at PCC.  Over the next 35 years I worked in many fields of hi tech manufacturing, from system design , manufacturing engineering and Project management. I have had the good fortune to travel many parts of the earth and there is no place like what we have here in South County. Four years ago my wife and I retried to our home overlooking the Nestucca river and our beautiful valley. It is an enchanting view.

I have fished the waters of Tillamook County for the past 40 years. I have seen many changes to our watersheds some good, some bad. My goal is to be part of the good and help in restoring our stream habitats in the waters I fish. I am a strong advocate for healthy watersheds and rivers on the North coast. “Healthy rivers are a source of life”

Jon Wehage

Jon was born and raised in NW Oregon and has lived in Tillamook County since 2003.  He has a B.S. in Forest Engineering from Oregon State University and has been with Stimson Lumber Company since 1995 where he currently manages the Coast Tree Farm. Jon and his wife Tanya spend most of their spare time with three children and their activities.  Additionally he is an avid outdoorsman, enjoys coaching youth, hobby farming and being involved in the community. Jon is serving on the Tillamook County Fair Board, Tillamook High School Agriculture and Natural Resources Advisory Committees and the Tillamook Bay Community College Agriculture and Natural Resource Program Advisory Committee.