Confluence Environmental Company

Confluence Environmental Company delivers a variety of environmental, infrastructure, and development projects.

We offer services in environmental science, project management, and regulatory strategy and compliance. Our team includes fish and wetland scientists, built and natural environment planners, regulatory and permitting specialists, and GIS and remote sensing experts. We ensure that each project is staffed with an outstanding team that can successfully deliver strategic solutions. Read more about our services here.

Our mission: To improve our community through effective and efficient solutions to our clients’ complex needs, while fostering a positive work place of innovation and opportunity.


June – Confluence has hired three staff this spring! Calvin Kelly Douglas joined as a Senior Ecologist, Audrey Michniak as a Project Biologist 1, and Alexis Huynh as Staff Scientist. Click on their names to read more about them. Welcome to all!

Confluence currently is hiring for three positions: a full-time Senior Scientist and Project Scientist, and half-time Accounting Specialist. Come join our team! See details here.

March – Congratulations to Confluence’s Eric Doyle for his publication “Integrating Ecosystem Models with Long-Term Monitoring to Support Salmon Recovery” in Fisheries. The article describes the integration of the Ecosystem Diagnosis and Treatment model (EDT) with long-term research, monitoring, and evaluation activities in the Okanogan River. This important work is being conducted by the Confederated Tribes of the Colville Reservation to support the ongoing conservation and recovery of steelhead listed under the Endangered Species Act. The lessons learned in this Columbia River subbasin demonstrate that integration of EDT with ecosystem monitoring can provide an effective an tool for adaptive management of habitat conservation and restoration priorities. This approach is transferrable and can be used to support salmon and steelhead conservation in any watershed.

March – Congratulations to the SR 520 Program West Approach Bridge Replacement Project Team for recognition by WSDOT’s Environmental Services Office. The team won a 2021 WSDOT Environmental Excellence Award “for outstanding contributions to the protection of Washington’s natural resources.” Confluence is proud to be a part of this team!

January – The South Fork Wind Farm, nearly 45 miles east of Long Island, New York, has received final approvals from the U.S. Department of the Interior’s Bureau of Ocean Energy Management – the final step to moving to construction phase. The South Fork Wind Farm will be one of the first marine offshore wind farms installed in the United States and is projected to be operational in 2023. Confluence is proud to have contributed to bringing this project to fruition. For more details, see the project webpage here.

Congratulations to Kerrie McArthur! Kerrie was recently promoted to Managing Senior Biologist, well-earned for her technical expertise on a wide variety of subjects and the high level of service she provides to her clients. Well done, Kerrie!


December 2021 – At Confluence, staff are like family, and we are all grateful for the camaraderie and inspiring work we get to do every day in the beautiful Pacific Northwest and beyond. As is our custom this time of year, Confluence is contributing to 22 nonprofits that enhance our community. The following organizations were selected by our employees:
ArtsFund, Ballard Food Bank, Bellingham Symphony Orchestra, Boys & Girls Club of Whatcom County, Duwamish River Cleanup Coalition, Evergreen Mountain Bike Alliance, Friends of the Issaquah Salmon Hatchery, Hero House NW, Mary’s Place, Mid Sound Fisheries Enhancement Group, Old Dog Haven, Puget Sound Restoration Fund, Rocky Mountain Elk Foundation, Salish Sea Expeditions, Seattle Aquarium, Seattle Children’s Hospital, Seattle Children’s PlayGarden, SHADOW Lake Nature Preserve, Solid Ground, Washington Trails Association, Washington Trails Association – Trails for Everyone, Youth Eastside Services.

Best wishes to you and yours for a healthy and happy holiday season!

July – Congratulations to Marlene Meaders and Grant Novak for their promotions to Principal-level staff, reflecting their exceptional service to clients and excellent technical skills. Similarly, Kelly McDonald was promoted to Project II. Kelly joined Confluence as a Staff Scientist in October 2018 and quickly moved through Project I to Project II, a testament to her thoughtful and high-quality work. To read more about Marlene, Grant, and Kelly, click on their photos on Our Staff page.

March – Congratulations to the State of Louisiana for reaching a major milestone with publication of the Draft Environmental Impact Statement and Restoration Plan for the Mid-Barataria Sediment Diversion. The MBSD is one of the most significant ecosystem restoration projects ever conceived, and will help Coastal Louisiana create and preserve wetlands. Kudos to the state leadership and Coastal Protection and Restoration Authority for guiding this project. Confluence is honored to be part of the project team that contributed to both reports.