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Our Team

Our Team

Nathan D. Zasler, MD

Mark Bender, PhD


Barbara Kellogg

Jackie Bartenstein

Chef “Q” Derks

Colin Fisher

Kelly Fisher, CTRS

Bridget Murphy Gutzmer, DPT

Carrie Hartwell, PhD, LCSW

Emily Kavanaugh, LPN

Krysta Lacey

Kristin Lee

Eileen Lorenz

Beth Ann Norvell, MA CCC-SLP

Laura Schreffler, OTR/L

Shanna Thorpe, MS OTR/L

Akesa Tucker

Tamara Wootson



Tree of Life Staff
Patricia Tiernan, R.N.

Patricia Tiernan, R.N.

Clinical Program Director

Patricia J. Tiernan, RN, Clinical Program Director at TOLS has 25+ years of experience in the development and operation of rehabilitation programs for individuals with brain injury (BI) and has worked for a number of well known BI service providers. Ms. Tiernan was a co-founder of the VBIA at the inception of the organization in 1982. She served as board member and chairperson of the Virginia Neurotrauma Advisory Board that disperses grant funds for both community based services and medical research projects designed to improve care and services to persons sustaining a BI. She remains active, reviewing grant proposals for the Board.

Throughout her career she has provided many hours of both formal and informal training to persons interested in understanding the various aspects of “hands on” brain injury care and rehabilitation. Ms. Tiernan has an abiding belief that building strong, caring, therapeutic relationships between and among clients, professional staff, caregivers, families, and all involved parties is essential to maximizing rehabilitation outcomes and quality of life after a brain injury.