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Northern Arizona VA Health Care System


Leadership Team

Portrait of Barbara A. Oemcke, MBA

Barbara A. Oemcke, MBA | 928-445-4860, ext. 6552

Medical Center Director

Ms. Oemcke was appointed Medical Center Director at the Northern Arizona VA Health Care System effective March 5, 2017.

Ms. Oemcke’s 30 years of Healthcare leadership experience includes Foodservice Management, Clinical Nutrition, Revenue Cycle Management, Business Management and Healthcare Administration. She served as interim Business Manager for VISN 23, during which time she led the successful roll-out of Fee Basis Claims Software and initiated the successful consolidation of VISN 23 revenue functions to the Central Plains Consolidated Patient Account Center. Ms. Oemcke also held positions of Associate Director and Interim Medical Center Director at the Southern Oregon Rehabilitation Center and Clinics from 2013 through 2017.

Ms. Oemcke holds a Bachelor's Degree in Nutrition from North Dakota State University and a Master’s Degree in Business Administration from St. Cloud State University as well as a graduate of the 2012 VA Health Care Leadership Development Program (HCLDP). Ms. Oemcke is involved in numerous National VA committees and workgroups. She is an outdoor enthusiast, enjoying travel, bicycling, hiking and the many outdoor recreational opportunities in Northern Arizona.

Portrait of A. Panneer Selvam, MD

A. Panneer Selvam, MD | (928) 445-4860 ext 6009

Chief of Staff

Dr. A. Panneer Selvam was appointed as the Chief of Staff, Northern Arizona VA Health Care System, Prescott, Arizona, effective December 16, 2018.

Dr. Selvam is Board Certified in Internal Medicine. He completed his medical degree at Stanley Medical College, Madras, India in 1987, and completed further post-graduate training in Internal Medicine in India, before moving to Ireland where he served as Senior House Officer, Internal Medicine at the Waterford Regional Hospital in Ireland from March 1994 through June 1995. He completed Residency in Internal Medicine at the University of Missouri, Columbia, Missouri in 1997. Dr. Selvam joined the Department of Veterans Affairs in July 1997 as a staff physician at the Harry S. Truman Memorial Veteran’s Hospital, and has served the VA since. His previous leadership positions include as the Director of Primary Care at the Harry S. Truman Veterans’ Hospital, Columbia, MO, from 2001 to 2005, and as the Chief of Staff at the Northern Arizona VA Health Care System from 2005 to 2013.

He is a 2007 graduate of the VA Health Care Leadership Institute. He served as a coach for the Health Care Leadership Institute (HCLI) in 2008-2009, and as a mentor for ECF (Executive Career Field) candidates in 2008-09, and 2009-10.

Portrait of Lisa Martin

Lisa Martin | 928-445-4860 ext 6553

Associate Director

Ms. Martin was appointed Associate Director at the Northern Arizona VA Health Care System effective March 18, 2018.

Ms. Martin is a 21-year Air Force Veteran with over 20 years of health care and leadership experience at the Federal, State and local levels. She recently completed a three year assignment as the Wyoming Health Care Center Director after serving as Chief of Health Administration with the Battle Creek VA Health Care System. Prior to working with the Department of Veteran Affairs, she worked for the Department of the Army as a Senior Management Analyst for Headquarters Army Europe.

Ms. Martin holds an undergraduate degree in Business Administration from the University of St. Thomas and a graduate degree in Public Administration from California State University Bakersfield.

Portrait of Mary Pittman Mach, RN, MSN

Mary Pittman Mach, RN, MSN | 928-445-4860 ext 6557

Associate Director for Patient Care Services/Nurse Executive

Ms. Pittman Mach was appointed the Associate Director of Patient Care Services/Nurse Executive on May 6, 2019.

Mary is the new Nurse Executive/Associate Director Patient Care Services (ADPCS). Mary grew up in Fulda Minnesota, a small farming community in the southwest part of the state. She graduated from the College of St. Benedict (St. Joseph MN) with her BSN in 1984 and her MSN from the University of Phoenix in 2012. In her 35-year nursing career, Mary’s worked in many settings. This includes Bone Marrow Transplant, Medical-Surgical, Surgical Intensive Care, Operating Room, Emergency Room, and Public Health Nursing. Mary’s leadership journey started 19 years ago and continues to be her passion. Mary comes to NAVAHCS from the St. Cloud, MN VA as the Nurse Administrator in the Surgical, Specialty Care Service Line. Mary’s been married to her husband Bob for 34 years (their 35th will be celebrated August 2019.) They have two children, Christopher and Chelsea. Christopher is a nurse anesthetist and Chelsea is a hospice nurse. Mary comes from a long line of nurses, including her mother, her sisters, her brother-in-law, her daughter- in law, niece and a nephew. Clearly a love of the profession runs in the family! Mary enjoys reading, hiking, music, and motorcycle rides with Bob. She also became a grandma in October, to a beautiful baby boy, Cameron. She’s happy to be at NAVAHCS!