Mary Ann Frantz

Roy Tucker is an experienced business counselor and advisor who focuses his practice on public offerings, mergers and acquisitions, securities compliance and corporate governance and restructurings. Roy has represented issuers and underwriters in numerous public offerings and regularly advises corporate clients and private equity firms on mergers, asset sales and leveraged buyouts.

Trish A. Walsh is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Trish A., who practices law in Portland, Oregon, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Trish A. is held by other top lawyers in the same geographic and legal practice area.

Yoona Park strives to embody the spirit of ”nunchi” (눈치), a Korean concept that recognizes the importance of reading the moods, tone, and goals of individuals within a group, and adjusting one’s actions to meet those group dynamics. Yoona is motivated by this interpersonal aspect of her collaborative efforts in the legal profession—including those with co-counsel, Keller Rohrback colleagues, and clients. Her leadership ability and passion for both teamwork and advocacy...

Steve D. Osborne is a top attorney recognized by Best Lawyers in the practice area(s) of Native American Law. Steve D., who practices law in Portland, Oregon, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Steve D. is held by other top lawyers in the same geographic and legal practice area.

Robert B. Lowry is a top attorney recognized by Best Lawyers in the practice area(s) of Environmental Law and Litigation - Environmental. Robert B., who practices law in Portland, Oregon, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Robert B. is held by other top lawyers in the same geographic and legal practice area.

Julie Smith is an appellate lawyer who also specializes in advising trial attorneys on litigation strategy and in drafting and arguing complex motions. Before joining Cosgrave, she served as an Assistant Attorney General in the Trial and Appellate Divisions of the Oregon Department of Justice, where she twice received the department’s Outstanding Achievement Award. Prior to that, she clerked for the Honorable Virginia Linder of the Oregon Court of Appeals. Appellate services include: Re...

John Schultz focuses on environmental, natural resources, federal Indian, and occupational safety and health law. For more than 25 years he has advised manufacturers, real estate developers, lending institutions, municipalities, tribal governments, and energy project developers regarding compliance with federal, state, and local environmental and occupational safety and health laws. He has extensive experience regarding federal and state Superfund, solid and hazardous waste, air, process/stor...

Lisa E. Martin is a top attorney recognized by Best Lawyers in the practice area(s) of Collaborative Law: Family Law. Lisa E., who practices law in Vancouver, Washington, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Lisa E. is held by other top lawyers in the same geographic and legal practice area.

Douglas Oh-Keith is a top attorney recognized by Best Lawyers in the practice area(s) of Medical Malpractice Law - Plaintiffs and Personal Injury Litigation - Plaintiffs. Douglas, who practices law in Lake Oswego, Oregon, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Douglas is held by other top lawyers in the same geographic and legal practice area.

Paul C. Buchanan is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Individuals, Employment Law - Management and Labor Law - Management. Paul C., who practices law in Portland, Oregon, has been recognized since 2007. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Paul C. is held by other top lawyers in the same geographic and legal practice area.