Sealaska Environmental Services

Sealaska Environmental Services, LLC (SES) is owned by Sealaska Government Services, LLC—a wholly-owned subsidiary of Sealaska Corporation. Established in 2003, SES's primary service areas include environmental planning, engineering, remediation, water resources and compliance. Our core competencies build on those of our parent company and its 35 years of land and natural resource management.

SES’s mission is to provide the highest level of service, quality and value to our clients. Our philosophy centers on developing and sustaining long-term relationships that are based on trust, innovation and technical quality. Our interdisciplinary team of scientists, engineers and planners provide integrated solutions to the project challenges faced by government agencies, Tribes and private industry. Learn more about our services

SES offers clients the responsiveness of a small business with the corporate resources, business systems and financial capacity to take on large and complex projects. As part of the larger Sealaska Corporation, we place significant emphasis on global solutions to protect the environment and ocean health. We are dedicated to partnering with our clients in a cost-efficient manner that provides value, innovation, and long-term benefit to their projects. SES has successfully executed more than $300 million in technical services contracts over the past 15 years for federal, state and local government, ports and private industry. Learn more about our past performance and clients


General Manager - Terry Heikkila, PE, PMP
Sealaska Environmental Services is hiring. View opportunities here
Seattle (Headquarters)
1200 6th Ave, Suite 800 
Seattle, WA 98101 
* please note – due to security at the building, Sealaska visitors must notify Sealaska prior to arriving to access the Sealaska Office
SEA Discovery Center 
18743 Front Street NE, Suite 201
PO Box 869
Poulsbo, WA  98370
3200 George Washington Way, Suite D 
Richland, WA 99354