Mark B. Williams
Chief Judge
Dianne McLeod
Court Administrator
Rebekah Goulet
Deputy Court Administrator
Diane Henkels
Associate Judge
Associate Judge
Community Court
Associate Judge
District Court
Associate Judge
Appellate Panel District Court
Associate Judge
Gaming Court

Chief Judge | Mark B. Williams

Mark Williams received his law degree from the University of Oregon School of Law in 1982. After graduating, he was awarded a one-year fellowship to serve as community organizer and staff attorney with Anishinable Legal Aid, an Indian Legal Services project in Case Lake, Minn. In 1984 Williams began work for Legal Aid of Multnomah County as a staff attorney, representing indigent clients in administrative hearings, appeals, and civil litigation. In 1987 he accepted a position with Multnomah County, serving as senior assistant county counsel for four years before being appointed senior assistant general counsel for METRO, the Portland, Oregon area regional government.

From 1996 to 2004, Williams served as general manager and chief executive officer for Metro’s Exposition Recreation Commission, a publicly owned facility management and construction organization with 575 full and part-time employees and $40 million in annual revenues. In 2003 Williams was appointed to serve concurrently as the first appointed chief operating officer for METRO, a regional government with more than 700 employees and a $220 million annual budget.

From 2004 until his retirement in 2018, Williams worked for Oregon Health & Sciences University (OHSU) in various positions including Vice President for Campus Development and as Chief Strategy Officer for OHSU’s Knight Cancer Center.

He was appointed a Judge in the Siletz Tribal Court in 1999. He is a retired member of the Oregon State Bar, and a current member of the Siletz Tribal Bar.


Associate Judge | Diane Henkels

Diane Henkels received a joint degree from Vermont Law School including a JD in 1997 and a Masters of Environmental Law and Policy in 1998.

She has practiced in the following courts including most courts of appeals: Siletz Tribal Court, Klamath Tribal Court, Confederated Tribes of Grand Ronde Tribal Court, Umatilla Tribal Court, Warm Springs Tribal Court, Burns Paiute Tribal Court, Confederated Tribes of Coos, Lower Umpqua and Siuslaw Indians Tribal Court. She is a member of Oregon, New York, Federal District Court of Oregon bars.

Henkels’ Masters degree included research in Madagascar with the Development and Environmental Law Center-Madagascar researching environmental law, and modern and customary law, re an eastern cloud forest national park, working in French and Malagasy.

Environmental Law Clerk for the Confederated Tribes of Siletz Indians was Henkels’ first legal job in 1998. She then became Project Attorney responsible for a federal grant funded CTSI Tribal Court development project and produced a Public Law 280 study, revised and drafted codes including criminal procedures, juvenile law, and community court.

Since then, Henkels has represented individual and entity clients, tribal and non-tribal, in tribal courts in juvenile, criminal, employment, and commercial matters at trial and appellate levels. She served as counsel in 2007 for the Confederated Tribes of the Umatilla Indian Reservation, and as a Senior Policy Analyst with Oregon Department of Energy in 2008. Since 2014, Henkels has been counsel for a nonprofit representing the small commercial customer class in public utility proceedings.

Henkels serves on the Federal District Court of Oregon Rules Advisory Committee, and she received the Oregon State Bar (“OSB”) President’s Sustainability Award in 2012. She has taught Indian and tribal law and other topics at the various universities in Oregon. Henkels is commodore of the Yaquina Bay Yacht Club.