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Pathologists' Assistants

A Pathologists’ Assistant is a highly trained allied health professional who provides various pathology services under the direction and supervision of a pathologist.

To learn more about a Pathologists’ Assistant see American Association of Pathologists’ Assistants at www.pathologistsassistants.org


David MasessaDavid Masessa

David Masessa is a Nationally Certified Pathologists’ Assistant. He began working in Pathology at the Sacramento County Coroners Office in 1987 and relocated to Oregon in 1998.

In his off time he enjoys racing his bicycles and traveling.


Undergraduate 1991

California State University, Sacramento

Graduate School 1994

Quinnipiac University, Hamden, Connecticuit

Amanda GallatinAmanda Gallatin

Amanda Gallatin is a Nationally Certified Pathologists’ Assistant. She became interested in anatomy as an undergraduate and pursued a career in pathology allowing her a hands-on approach.

In her leisure she enjoys exploring the Oregon outdoors, swimming and reading.


Undergraduate 2006

University of Illinois at Urbana-Champaign, Illinois

Graduate School 2008

Rosalind Franklin University Medicine and Science, Illinois


Michele KowalczikMichele Kowalczik

Michele Kowalczik is a Nationally Certified Pathologists' Assistant. Having worked in both the medical and forensic fields, as well as in regular positions and more recently in freelance work, she decided to join Vista Pathology on a permanent basis.

In her free time, she enjoys hiking, kayaking, gardening and raising chickens.


Undergraduate 1996

Wayne State University, Detroit, MI