Meet Our Team

Image of Doctor Mike Troop for Troop Veterinary Services in Marion IL

Dr. Mike Troop

Dr. Troop graduated in 1987 from the University of Illinois College of Veterinary Medicine. He has been serving the Southern Illinois community as a veterinarian for over 34 years. Dr. Troop loves the challenges his job provides, developing long-term relationships with his clients, and loving and caring for their pets. Dr. Troop and his wife, Debra, are the proud parents of two sons - Stephen is in his second year of medical school at SIU - Jonathan is currently serving on active duty in the United States Army. They also have four amazing dogs: Kimber, Reagan, Smitty, and Lucky Dog. Dr. Troop enjoys serving in his church, traveling with his family, hunting, and spending time on his farm.

Image of Doctor LeeAnn Greenwell for Troop Veterinary Services in Marion IL

Dr. LeeAnn Greenwell

Dr. Greenwell is a 1995 graduate of Auburn University College of Veterinary Medicine. She has been a full-time veterinarian with Troop Veterinary Services for 3-1/2 years. Prior to coming to Troop Veterinary Services, Dr. Greenwell served as the Program Director for the SICCM Veterinary Technology Program for 9 years. She is passionate about connecting with clients and educating them in the care of their pets. Dr. Greenwell shares her home with "Grant", "Grace", "Biddy", and the rest of her cat family! Her hobbies include knitting, sewing, attending comedy shows, and working with animal rescue organizations.

Dr. Hilary Seals

Dr. Hilary Seals grew up in Strongsville, OH, and attended Auburn University for her undergrad and Veterinary school, where she graduated in 2020. She has special interests in theriogenology, ultrasound and dentistry.

Outside of work, she enjoys reading, hiking and playing piano. She also loves to spend time with her husband, Chase, and their child.

Image of Debra Troop, Hospital Manager for Troop Veterinary Services in Marion IL

Debra Troop

Hospital Manager

Debra has been a part of the Southern Illinois veterinary community since 1992 when she married her husband, Mike. She graduated from SIU with a bachelor's degree in Accounting and has used her education to manage their veterinary practices for the last 29 years. Prior to being a full-time hospital manager, Debra homeschooled their two sons, Stephen and Jonathan. Their sons grew up helping their dad in the veterinary clinic with late night emergencies, assisting in surgeries, and cleaning cages. Debra enjoys working with her husband and the entire team at Troop Veterinary Services. The clients she has met over the years have become part of her extended family. Debra loves being outdoors, traveling, walking, hosting Bible Study in their home, and spending time with family.

Image of Sarah Underhill, Certified Veterinary Technician for Troop Veterinary Services in Marion IL

Sarah Underhill


Sarah is a full-time Certified Veterinary Technician. She graduated from SICCM in 2014 with a degree in Associates and Applied Science/Veterinary Technology. She has been with Troop Veterinary Services for 9 years! Sarah is passionate about caring for our clients’ pets, specifically dental health. She and her husband, Zac, share their home with their 3 dogs – Cassie, Chulin, and Julien; 3 cats – Vickie, Norah, and Carmen – 2 ferrets – Tina and Lois, and Patrice their cockatiel. Sarah enjoys watching hockey and scary movies, taking care of her house plants, and yoga.

Image of Paula Wells, Veterinary Assistant for Troop Veterinary Services in Marion IL

Paula Wells

Veterinary Assistant

Paula serves as a full-time veterinary assistant with over 4 years of experience. She and her husband, Junior, have 4 children and 8 grandchildren. Paula loves working as a team member in caring for our clients’ pets. Watching the sick pets return to health and go home to their families gives her a great deal of satisfaction. She also enjoys the variety of dogs and cats that visit our hospital every day. Paula likes fishing, gardening, the hummingbirds that visit her every summer, and spending time with her family!