Duwamish Tribal Council member Ken Workman was selected … Cece Hoffman is a member of the Confederated Tribes of the Umatilla Indian Reservation (CTUIR), with ancestry also amongst the Nimiipuu …Duwamish Tribal Council member Ken Workman was selected … Cece Hoffman is a member of the Confederated Tribes of the Umatilla Indian Reservation (CTUIR), with ancestry also amongst the Nimiipuu …