Our Board of Directors

Pet Peace of Mind was founded by a group of professionals working in the fields of human health care, medical research, academia, palliative care, veterinary medicine, business, and nonprofit operations.

Recognizing the growing research proving the emotional and health benefits of the human-pet bond, PPOM’s leaders seek to fill a void in the nonprofit sector dedicated to helping hospice and palliative care patients care for their pets.



Dianne McGill founded Pet Peace of Mind in 2015 to ensure hospice and palliative care patients have the support they need for their animal companions.

Dianne is the former Chief Executive Officer and Executive Director of the Banfield Charitable Trust, a public benefit charity. She joined the organization in 2006 and guided the charity’s expansion to develop and launch of the Pet Peace of Mind and Meals on Wheels Pet Care Assistance programs and several others. During her tenure, the charity was thrice awarded Charity Navigator’s four star rating for operational transparency and financial stewardship. In 2013 and 2014, Charity Navigator also named the charity to its national top 10 national list of impact-to-income public charities.

Prior to her role with Banfield Charitable Trust, Dianne was the Resource Development Director for a higher education non-profit.  She has also served as an officer and director for seven nonprofit boards of directors and currently devotes a portion of her time to nonprofit management consulting.  Her other leadership roles include senior level positions with the Associated Press, McClatchy Company, and Gannett Newspapers.

Dianne graduated summa cum laude with a BS in Management & Organizational Development. She also holds certificates in Community Mediation and Organizational Training.


Terri Roberts serves as the Vice President of Marketing and Volunteer Services at Columbus Hospice.  Terri oversees all fundraising efforts, media and community outreach for the non-profit organization.  Her responsibilities include volunteer management overseeing 200+ volunteers.  Terri’s responsibilities include recruiting and integrating volunteers into numerous functions within Columbus Hospice. Terri was instrumental in Columbus Hospice’s early adaptation of the Pet Peace of Mind program in 2009, where it remains today the most successful local program in the nation.

Terri serves with the Georgia Hospice and Palliative Care Organization in the capacity of planning volunteer conferences with multi-state attendance. She is a speaker on the state and national level on numerous topics including Pet Peace of Mind Program, We Honor Veterans Program, volunteer management and non-profit fundraising.

She is a volunteer for Friends of the Libraries, Animal Ark, American Cancer Society and the Alzheimer’s Association. Terri attended Eastern Kentucky University and Watterson Business College.


Dr. Lester holds degrees in Microbiology with high scholarship, Veterinary Science cum laude, and a Doctor of Veterinary Medicine cum laude from Oregon State and Washington State Universities. He completed the American Association of Veterinary Medical Colleges Leadership Academy.

Dr. Lester currently serves as as Chief Medical Officer WellHaven Pet Health. He was previously Assistant Dean for the College of Veterinary Medicine at Lincoln Memorial University. He spent his early career as a small town mixed animal practice owner before joining the founding team at Banfield Pet Hospital. During his career, Dr. Lester has held leadership positions in medicine, operations, franchising, human resources, professional relations, and academia.

Dr. Lester serves on a variety of professional, university, and college committees, boards and task forces including as a two-time gubernatorial appointee to the Oregon Veterinary Medical Examining Board, a state delegate to the American Association of Veterinary State Boards, the American Veterinary Medical Associations Council on Education site team, is a past Banfield Charitable Trust Grant leader, on the National Board of Veterinary Medical Examiners Job Analysis SME Working Group, and on the board of the North American Veterinary Community.


Upon completing a Bachelor’s degree in biology and chemistry from Murray State University in Kentucky, Dr. Mia Cary spent six years in the field of marine mammalogy. This six-year adventure began with an internship under Dr. James G. Mead at the Museum of Natural History in Washington, DC and included unique work in diverse locations such as the Dominican Republic (Center for Coastal Studies) and Barrow, Alaska (North Slope Borough, Department of Wildlife Management).

Dr. Cary graduated with honors from the University of Florida’s College of Veterinary Medicine in 1999. After working in private practice in Gainesville, FL as an associate veterinarian (and before and during veterinary school as a veterinary technician) she joined Novartis Animal Health where she held a variety of positions including Territory Manager, Key Customer Consultant, Regional Trainer, District Manager, National Sales Training Manager, and Brand Manager.

Dr. Cary joined Boehringer Ingelheim Vetmedica, Inc. (BIVI) in June 2004 as a Professional Service Veterinarian covering the Southeastern US and in February 2005 was named Manager of the Pet Segment Professional Services team. In February 2006 she was promoted to Marketing Manager for the Companion Animal Segment and in January 2007 transitioned into the role of Senior Associate Director of Professional Services followed by a Regional Sales Manager role from 2009 until 2013.

Dr. Cary joined the North American Veterinary Community (NAVC) in February 2014 as the Vice President of Corporate Relations. In February 2016 Dr. Cary was named NAVC’s first-ever Chief Innovation Officer. In May of 2017 this position evolved to Chief Collaboration Officer and included oversight for all NAVC educational offerings. At that time Dr. Cary also served as Executive Director for the Veterinary Innovation Council (VIC).  She served as the 2017 President for the American Association of Industry Veterinarians (AAIV) and serves on the Board of Directors for Pet Peace of Mind (PPOM).


John Mastrojohn III serves as the Executive Vice President and Chief Operating Officer at the National Hospice and Palliative Care Organization.  John has more than 25 years of experience in healthcare leadership with the past 18 years in end-of-life care leadership. He is a frequent speaker on numerous hospice and palliative care topics including Hospice & Palliative Care within the Healthcare Continuum, Global Perspectives of International Hospice & Palliative Care, Community-Based Palliative Care and Hospice National Trends.

He served as founding director of Palliative Care and Hospice Services at Summa Health System, an integrated healthcare system located in Ohio. He has a Bachelor of Science in Nursing from University of Akron and holds both a Master of Science in Nursing Administration and a Master of Business Administration degree from Kent State University. During the 2004/2005 academic year, he served as a US Fulbright Fellow in Hungary focusing on end-of-life care development.

John has served as adjunct faculty at Kent State University, the Northeastern Ohio Universities College of Medicine, and the University of Pécs, (Pécs, Hungary). He has presented nationally and internationally on a variety of hospice and palliative care topics and has been published in peer reviewed journals on end-of-life care topics.

Emeritus Board Members