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Meet the Staff

Dr. Brad O'Brien

Dr. O’Brien graduated from the University of Oklahoma School of dentistry in 1986. He completed his advanced general dentistry residency at Ft. Sill Oklahoma before spending 7 years as a dentist in the US Army. As an Army dentist Dr. O’Brien spent time in Germany, New York and Ft. Lewis. He moved to Leavenworth in 1994 after purchasing his practice here. He is a member of the American Dental Association, Washington State Dental Association, and the North Central Washington Dental Society.


Trinice Lak / Office Manager

Trinice obtained her certificate in dental assisting from Eaton College in 1989. Born in Everett, Wa and raised in South Carolina. She moved back to Washington at age 20. She lived and worked in Mill Creek , Washington for 10 yrs at Mill Creek Family Dentistry, until moving to Leavenworth in 1997.She was owner/operator of an in home daycare for 3 yrs, until her youngest daughter started school.

She joined Dr.O'Briens staff in 2003 as a dental assistant for 5 yrs, and is now working as office manager.Married to George Lak for 15 yrs, Trinice has 3 daughters , a stepdaughter and a step son. She is also proud Nana to 5 grandchildren,4 girls and 1 boy.She enjoys boating, jet skiing and all summer activities. Trinice says the perfect day is any day spent with family and friends.


Desiree Dye / Registered Dental Hygienist 

Desiree (Dezi) Dye completed her degree in Dental Hygiene from Pierce College in 1993.The daughter of a dentist, she worked 11 years as a dental assistant before becoming a hygienist. She worked in Redmond/Kirkland area for 12 years before moving to Wenatchee and joining Dr. O'Brien's practice in 2005. She and husband Rod have 2 children who attend Wenatchee High School. She spends time as a family at their cabin in Priest Lake, Idaho.. Dezi is active in her church, enjoys home decorating, hiking, cheering at football games with her family, and working out at the gym. She is a member of the North Central Washington Dental Society and the Washington State Hygienist Association.

Suzanne Cowan / Registered Dental Hygienist

Suzanne graduated at the top of her class in 1985 with a Bachelor of Science degree in Dental Hygiene from Idaho State University. Following graduation, she worked at three private practices in Pullman Washington, and it was there that she met and married husband Robert. After working several years at a periodontist and a general dentistry practice in Bakersfield California, they moved in 1993 to Leavenworth, Robert's hometown. In 1994 Suzanne began to work in the practice that Dr. O'Brien would eventually own, and has been in his employ for 17 years.. Suzanne has two daughters, one a junior in high school and the other a sophomore in college. In her spare time she enjoys her pets, piano, church volunteer, Kodiak Club Volleyball board member, and volunteers for her daughter's school sports' activities. Suzanne served as past-President of the North Central Washington Dental Hygiene Society for 3 years and is currently a member. She is also a member of the Washington State Dental Hygiene Association and the American Dental Hygiene Association. 

 Shelly Swanson / Bookkeeper

Shelly is a graduate from Griffin Business College in Bellevue Washington, and has been a bookkeeper for more than 25 years. Shelly began bookkeeeping for her parents before she was even out of high school! We were fortunate to have her join our staff in the spring of 2007.  She is a long time resident of Leavenworth,  and is Mom to two busy daughters. Shelly likes to spend time snowmobiling, skiing, and jet skiing. She is an avid traveler, having been all over Europe and all points in-between. Her future plans include more time with her beautiful girls and more travel.

Lindsey Sanderlin / Dental Assistant

Lindsey attended and completed the dental assistant program at Seattle's Dental Assistant Training Center in 2009. She was hired by Dr. O'Brien in her hometown of Leavenworth the following year. Lindsey lives just outside of Leavenworth with her husband, Tyrel Sandelin. Her time outside of work is spent with family, enjoying the outdoors with her beloved golden retriever Sampson, and preparing for her and Tyrel's first baby, due in December.

Jessica Valencia / Dental Assistant

Jessica completed the dental assisting program at Bryman College in Lynnwood, Wa in 2004. Following graduation she lived and worked in Shoreline. She moved back home in 2009, and joined Dr.O'Brien staff.Jessica is proficient in English and Spanish. She and husband Daniel live in Wenatchee. Outside of work Jessica enjoys outdoor activities, dancing, and spending time with family and friends.

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