Our Team
Our caring and compassionate veterinary care team!
Meet the Veterinarians & Team of Emergency Veterinary Clinic of Tualatin in Oregon. We’re pleased to provide exceptional vet care for your pets!
Please call us at 503-691-7922 to speak to one of our caring veterinary staff members!
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Dr. Jo-Anne Wisniewski
Practice Founder
Dr. Wisniewski’s undergraduate degree is from the University of Washington where she… -
Dr. Jonathan Wisniewski
Practice Owner
Dr. Jonathan Wisniewski received his undergraduate degree (Bachelors of Arts) from…
Practice Owner
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Dr. Andy Nuijens
Associate Veterinarian
Dr. Andy Nuijens joined the EVCOT staff in August of 2008. He came on board full-time in… -
Dr. Daniel O'Loughlin
Associate Veterinarian
Dr. Daniel O’Loughlin has been with EVCOT since January of 2000. Dr. Dan graduated from… -
Dr. Jamie Warren
Associate Veterinarian
Dr. Jamie Warren was raised in the beautiful, scenic community of Corbett, Oregon. Located… -
Dr. Nicole Chamberlain
Associate Veterinarian
Dr. Nicole Chamberlin has been with EVCOT since 2005, working at another day practice in… -
Dr. Pamela Williams
Associate Veterinarian
Dr. Williams received her Bachelors of Science from Oregon State University in 1974 and… -
Dr. Reza Sadreddin
Associate Veterinarian
Dr. Reza Sadreddin received his Associate degree in Veterinary Technology from Portland… -
Robert Siefken
Dr. Rob Siefken joined the EVCOT emergency team in August of 2018. He graduated from…
Associate Veterinarians
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Dr. Kerri Jackson
Relief Veterinarian
Dr. Kerri Jackson works full-time at her day practice in Sherwood, and she keeps her ER… -
Dr. Kieth Sierbinski
Relief Veterinarian
Dr. Keith Sierbinski earned his Doctorate of Veterinary Medicine from the University of…
