About George O.
George O. Tamblyn built his legal foundation at Cornell University. He enrolled in 1960 and completed his Juris Doctor in 1964, studying international law during his time there. That academic background informed the early shape of his practice and gave him an awareness of legal issues that cross borders.
He began practicing law in the mid-1960s. Over the decades he established a career across the Pacific Northwest. He is admitted to practice in both Oregon and Washington. His work has taken him into state courts and administrative proceedings, and into matters that require attention to the differences between neighboring state legal systems.
Tamblyn's international law training has been a recurring thread. It has helped when clients faced questions that touched on foreign law or cross-border arrangements. He has also handled a range of domestic matters common to long-standing regional practitioners. He approaches cases with an eye to both statutory detail and practical results.
Colleagues describe Tamblyn as methodical and steady. He has worked in private practice for many years and has guided clients through transactional work, regulatory interactions and contested proceedings. He tends to favor clear analysis over flourish. That temperament has suited practice in two jurisdictions and in matters that implicate both state rules and broader legal principles.
Currently he is based at Mercer Island Law Group. There he continues to serve clients in matters that arise in Oregon and Washington. As of 2026, his practice focuses on counseling individuals and businesses on legal issues that span the two states, drawing on decades of experience and his early study of international law.
