About PSIvet

About PSIvet

When our members talk about PSIvet, the term “trusted advocate” comes up often. More than 5,000 independent veterinary practices count on us to help them save more, grow more—and more successfully compete with corporate hospitals, big-box stores and online retailers.

Our integrated professional services help you run a better business.

GPO. Purchase goods and services at negotiated prices from the industry’s first and largest group purchasing organization.
Education and Training. Learn to be more productive with our proprietary training resources.
Technology Solutions. Use practice and partner data insights to strengthen your practice.

We’re proud to be partners with our members and their teams, working together to promote independence for the benefit of practice owners, pet parents and pets.

Strong relationships

Robust services go a long way in delivering the benefits you’re looking for. But what makes them valuable are the people behind them. The PSIvet team works closely with yours to make sure you get the most out of everything we offer. With a personal touch and a caring attitude, our dedicated professionals are looking out for you.

“The Most Trusted Advocate” for the Independent Veterinary PracticeSM

PSIvet makes it easy to order from your favorite suppliers—and save.

Become a preferred vendor to our 5,000 members by partnering with PSIvet today. Learn more.

Advisory Council

Twelve PSIvet members comprise the PSIvet Advisory Council. These independent veterinary practice owners—along with three PSIvet executives—contribute their time, talent and passion to help the organization better serve all members.

Valeriy Andreyev, DVM

Eco Deco Pet Hospital
Miami, FL

Michelle Gengler, DVM

Duvall Veterinary Hospital
Duval, WA

Melissa Harrer, DVM

Animal Clinic of Council Bluffs
Glenwood, IA

Judy Hofmeister, DVM

Animal Medical Center of Middletown
Louisville, KY

Michelle Jude, DVM

Sheabel Veterinary Svc.
Lexington, KY

Brian Maxwell, DVM

Adobe Animal Hospital and Adobe Animal Hospital
South Bay
Los Altos, CA

Darrell Phillips, DVM

Animal Emergency and Referral Center
Flowood, MS

Cynthia Rachal, DVM

Animal Health Care Center
Arlington, TX

Sree Reddy, DVM

Seven Oaks Pet Hospital, Affordable Pet Hospital and North Tampa Pet Hospital Wesley
Chapel, FL

Our Leadership Team

Patrick McCarthy, President

Pat McCarthy joined PSI in July, 2013 as the Director of Operations. He was promoted to President in May, 2018. Prior to joining PSI, Mr. McCarthy was the Vice President of Operations at Pet Partners, a veterinary practice consolidator. He oversaw the purchasing department, was responsible for the implementation of operational efficiencies and reducing expenses. He also led staff training and development. Before joining Pet Partners, Mr. McCarthy was the Sr. Manager of Corporate/Strategic Accounts at IDEXX Laboratories. Pat led a team who was responsible for the sales, marketing, finance, education and implementation of IDEXX’s complete portfolio of products and services for corporate and strategic account customers in North America.

Previously, Mr. McCarthy worked in the chemical industry for Buckman Laboratories, a Memphis-based, global chemical company. He held several roles and was promoted to Regional Manager for the Northeast where he oversaw the sales and technical support for a team of 20 before he had a career change and joined IDEXX Laboratories. Pat holds a BS in biology with a minor in chemistry from Lycoming College, an MS in environmental studies from Duke University, and an MBA from the University at Albany, NY.

Pat lives in St. Petersburg, FL and is married with three children. His hobbies include fitness, music, sports, traveling and all things outdoors.

Dan Jones, DVM, Director of Business Development

Dr. Jones is a Veterinarian who has been an independent veterinary practice owner for more than 30 years. He owned and operated two general medicine practices from 1987 through 1999, and he owned an emergency specialty practice from 1992 until 2019. Dr. Jones is currently the Director of Operations and Business Development for PSIvet and has held that position for the last seven years. His main responsibility at PSIvet is managing vendor contracts and relationships Dan’s background includes 13 years with Banfield in numerous positions from practicing veterinarian to Vice President of Medical Leadership.

He graduated with a Bachelor of Science in 1980 and completed his Doctor of Veterinary Medicine in 1984 from Auburn University.

Dan’s hobbies are golf, fishing and travel. His wife Cassie is a respiratory therapist in a neonatal intensive care unit. Together, they have two adult daughters Angela and Kelly, and two granddaughters, Acacia and Margo.

Patricia McNamara, DVM, Director of Membership Services

Dr. McNamara has been with Purchasing Services since 2000. She oversees PSI’s network of Area Managers, visits member practices and is responsible for all sales analytics.

She earned her Doctorate of Veterinary Medicine from Ross University SVM, after completed her Senior Rotation at Louisiana State University SVM. Her background includes working in a feline exclusive practice, a small animal/exotics practice and she held an internship at the Houston Zoo. Dr. McNamara’s business background comes from growing up in very successful restaurants and a hotel. She went on to work for a large restaurant corporation while completing her undergraduate degree, where she won awards for inventory control.

Dr. McNamara is published in the Journal of Zoo and Wildlife Medicine: Myelogenous Leukemia in a Bearded Dragon (Acanthodraco vitticeps). She is a member of the AVMA, FVMA, AQHA and ADGA. While Dr. McNamara is away from home, her Quarter Horses and LaMancha goats enjoy her 10-acre, lake front farm.

Jim Ladd, Vice President, Marketing

Jim joined PSIvet in August, 2018 as the Director of Marketing and was promoted to Vice President of Marketing in July, 2020. His primary role is to oversee all marketing and communication functions within the organization. Jim has expertise in business vision, strategic planning, brand development and digital campaigns that motivate audiences. Prior to joining PSIvet, Jim was the Vice President of Corporate marketing at Vetstreet. Jim led Vetstreets marketing team through 6 years of tremendous growth resulting in 2 acquisitions by VCA Antech in 2011 and Henry Schein Animal Health in 2016.

Previously, Jim worked on the advertising agency side of the business and has worked with local, regional and global companies spanning a wide range of industries. Ever the entrepreneur, Jim looks for opportunities to help build things. Whether its developing brands, promoting companies or enhancing campaigns, he continuously strives to bring new ideas to life.

Jim currently lives in St. Petersburg, Florida and is married 35 years with three adult children. He still maintains a home in New Jersey and has deep family roots there. In his spare time he enjoys time with his family, riding his motorcycle or relaxing on his boat.

Dianna Lally, Controller

Dianna Lally, CPA, Controller – Ms. Lally is a licensed CPA in California and Hawaii, and joined PSI in 2017. She oversees the Accounting department and Administrative staff in the Corporate Office.

Prior to joining PSI, Ms. Lally held Controllership positions, where she was involved with acquisitions, cash management, sale of divisions of business entities, restructuring, multiple software conversions, establishment and/or documentation of policies and procedures, and internal and external reporting and consolidations, budgeting and forecasting. She has experience in a wide variety of industries, including, but not limited to: small business, construction, real estate, non-profit, manufacturing, passenger vehicle and heavy equipment dealerships, high-tech, distribution, agriculture and bio-science. Dianna has worked with a combination of closely held and publicly held entities.

Ms. Lally holds a Bachelor’s Degree in Business Administration with a concentration in Accounting from California State University, Fullerton and is an an alumnus of PriceWaterhouseCoopers, Los Angeles and Orange County California offices. She belongs to the AICPA, Florida Institute of CPA’s and the California Society of CPA’s.

When not working, Ms. Lally enjoys spending time with her family, travelling, shelling on the beach, and officiating at age group swim meets.

Vendor Relationship Managers

PSIvet's Vendor Relationship Managers or VRM's work directly with our vendor partners to ensure we negotiate best pricing so our members can save more and earn valuable rebates.

Kelly Fusco


Katerina Williamson

Dedicated Area Managers

PSIvet’s industry pros are here to help. Each AM supports members in a specific region, making a difference for the practices we serve.

Gulf Coast
Denise Strickland, District Manager
Kara Hicks
Sarah Radford
Jessica King
Julie Brockman
Jeanne Crowley
Kym Graham
Alyssa Douin

Atlantic Coast
Lacey Davis, District Manager
Celene Wasserman
Toya Little
Chelsea Matzen
Natalie Rion
Kimberly Shaffer
Samantha Thibault
Jen Seuss

Midwest / West Coast 
Emily Gerhart
Stephanie Glazer
Carin Ponder
Melari Robaina
Sarene Cardwell
Matthew Acuna
Katie Perry

Melissa Wendt, Member Relations Manager
Tracy Owens Waring

Explore Career Opportunities

If you have a heart for pets, a mind for business and an interest in helping independent veterinary practices succeed, PSIvet may be a fit for you.

Join Our Team