Our caring and compassionate veterinary care team!

Meet the Veterinarians & Team of Green Valley Animal Hospital in Ijamsville! We’re pleased to provide exceptional vet care for your pets! Please call us at (301)831-6930 to speak to one of our caring veterinary staff members!


Sara Kieffer

Hospital Manager

Sara came to Green Valley in February 2004. With always having a passion for animals and caring for them, she started at the hospital as a kennel technician to learn more about the field. Sara quickly learned that this career is her passion and she loves every minute of it.

In Sara’s free time, she enjoys spending time with her husband and two children. Her plans for the future include potentially furthering her education in either animal science or business management.

Lisa Seabolt

Assistant Manager

Lisa started working at GVAH in April of 1998. During her tenure at here at GVAH, Lisa has worked as both a veterinary technician and a receptionist. In addition to her current responsibility as the Patient Care Coordinator, Lisa also helps to coordinate communications with clients and helps to facilitate inventory logistics.

When not at work, Lisa enjoys spending time with her husband Rodney and sons Elijah and Caleb. Ensuring that there is never a dull moment in their house there are 2 dogs, 4 cats, a sun conure, a nanday conure and plenty of fish.

Douglas Warden


Doug was born in Agana, Guam in 1964. Both his father and mother were officers in the United States Air Force. Doug married Laura Page in June of 2002. They purchased Green Valley Animal Hospital in September of 2003. After growing up outside of Towson, MD, and graduating from Towson Sr. High School, Doug obtained a Bachelor’s of Science degree from Towson University in Social Science and an MLA graduate degree from Johns Hopkins University.


Ashley Phillips

Medical Supervisor

Ashley became employed at Green Valley in March of 2017 as a Veterinary Technician. She has been working in the Veterinary field as a technician for over 10 years and is currently enrolled in Penn Foster’s online RVT Program. She absolutely loves her job and the rewarding feeling it brings. She grew up on a farm with Cow’s, Horses and Dogs. She has always enjoyed helping with them and just being around them in general.

Ashley’s personal hobbies include spending time with her two children, two dogs, and enjoying outdoor activities.

Mackenzie Watson


Mackenzie initially started interning at Green Valley in summer of 2018 and was officially hired as a Technician in December 2018 after graduating from Murray State University. She successfully passed her Veterinary Technician National Exam in March 2019.

Mackenzie has always been interested in working with and being around animals since she was a little kid. She plans to further her education and continue working at GVAH. When not at the clinic, you can find Mackenzie hiking, playing with her dog, heading to the beach, or being with friends and family.

Jenn Wheeler

Medical Supervisor

Jennifer started working at Green Valley in December 2016. She has been in the Veterinary field since 2013. She went to Frederick Community College for her Veterinary Assistant Certification in 2013 and plans to continue her education.

She has always loved working with animals and says she wouldn’t change it for the world. When Jenn is not working, she enjoys hiking, roller coasters, the beach, food, and spending time with her cat!

Sarah Harbinson

Veterinary Technician

Sarah Harbinson started at Green Valley in September of 2014. She is a Veterinary Technician, Receptionist, The Adoption Coordinator, and the General Staff Representative. Sarah also represents GVAH at events like Fast & Furriest, Howl-O-Wine, and K-9’s in the Vine.

Every day is a learning experience for Sarah. She continues to further her knowledge in the clinic as well as out of the clinic with Continuing Education courses. Sarah has been interested in all kinds of pets since she was a child. She grew up with dogs, cats, lizards, fish, rats, and a snake. She is very open to whatever opportunities the future may hold, especially within GVAH. Sarah believes the best way of planning for the future is to make the most of the present.

Out of work Sarah loves spending time with her family and her three amazing pet rats, Penelope, Leli, and Liv.

Jolene Chmelik

Registered Veterinary Technician

Jolene started at Green Valley Animal Hospital in August of 2018 after graduating from Nebraska College of Agriculture with an Associates Degree in Veterinary Medicine. She has always had a strong interest in animals since growing up on a farm, raising all sorts of animals, and participating in 4-H. Her personal hobbies include spending time with family and friends, as well as backpacking and hiking.

Jolene’s plans for the future include working at Green Valley Animal Hospital and continuing to develop her skills as a technician.

Kayla O'Brien

Veterinary Technician

Kayla joined the GVAH family in February of 2018 when she began as an intern and officially started working as a Veterinary Technician in April of 2018. Kayla attended Frederick Community College and received her Veterinary Assistance Certification and plans to continue her education to become an RVT. Kayla has recently also become the Social Media/Marketing Coordinator for Green Valley towards the end of 2019. She has always had a strong passion for animals and has always wanted to have a career that allows her to work with them.

Kayla has been riding horses since she was four years old. She currently has one horse, a Thoroughbred named Shawnee. She has always enjoyed the sport of eventing with her horse and spending time with her friends and family. She also has a Chocolate lab, Freisha, and 1-year-old kitten that she rescued and bottle-fed while being employed at GVAH.

Amy Morrisson

Veterinary Technician

Amy has been employed with Green Valley since June 2003! She loves being a part of the team at GVAH. Amy has a strong background in reproduction, breeding and whelping. She is the owner of Haus Morrisson German Shepherds and own 6 German Shepherd Dogs.  In Amy’s spare time she actively trains her dogs in Obedience, Tracking, Protection, Scent Detection & Nosework, Conformation and many AKC & UKC venues. Amy is also on the board of directors for the German Shepherd Dog Club of Greater Washington, DC.

Jenna Kuntz

Veterinary Technician

Jenna started working at Green Valley in May of 2020. She’s the lead Kennel Technician. She has taken Vet Science classes in high school and is looking to further her education in the veterinary field. She’s always had an interest in animals since she was a child. She grew up with all kinds of pets from Dogs and Cats to Horses, Sheep, Cows, and Goats. She enjoys helping her family out on their farm and was always playing “doctor” with her animals. When Jenna isn’t at work she loves hiking with her dog along with traveling and hanging out with her friends.

Desarae Middlebrooks

Veterinary Technician

Desarae started working at Green Valley animal hospital in the beginning of July of 2021. She came to us where she was at another veterinary hospital for 3.5 years. She has always had an interest in working with animals. She is currently in college for nursing, but plans on being a vet tech part time. When Desarae is not working, she can be found either with riding her horse, Otter, hanging out with her dogs, Atlas and Journey, or hiking and traveling.


Sarah Colvin

Receptionist Supervisor

My name is Sarah and I joined the GVAH family in February 2018. I am a certified veterinary assistant and I have been working in the veterinary field for 3 years. I have always had a job that allows me to work with animals. I love interacting with our wonderful clients and their amazing pets.

In my spare time I enjoy hiking, reading and spending time with my three dogs and my family.

Caitlin O'Connell


I came to Green Valley in September of 2012 and I am thrilled to be here! I graduated from Hood College with a degree in Social Work in 2008. Upon graduating, I knew that I wanted a career working with animals and their families. I have worked with both large and small animals through the years and have loved every minute of it. At Green Valley, I enjoy working with our great clients and helping them to feel welcome and comfortable. Seeing a pet and their family go home happy is my number one priority.

When not at work I enjoy spending time with my husband, daughter, our dog, two cats (one adopted from GVAH! ) and two horses. My interests are practicing yoga, reading, horse-back riding, hiking and spending time with my family and friends.

Alice Lindsey


Alice originally worked at KVS from 2000-2004 as a vet assistant/technician. After her 3rd child she decided to stay at home with her daughters. Alice’s background is in Microbiology and Equine Sciences from UMCP. She has since managed horse farms and taught riders from all ages. Alice started working back at GVAH early 2020 part time as a receptionist. In the future Alice would like to continue her education in animal nutrition and bodywork. Her hobbies include spending time with family, Equine nutrition and bodywork, riding, gardening, and sharing her lap with dogs and cats.

Mary Yonemura


Mary joined the GVAH team as a receptionist in October 2020 and has been in the veterinary field for 14 years. Mary has always loved animals and currently shares her home with two cats named Holly and Harry and two dogs named Penny and Mouse. When not at work, Mary enjoys spending time with her boyfriend, their fur babies, family and friends. Also, seeing live music and trying new recipes in the Ninja Foodie.


Danielle Firlie

Veterinary Assistant

Danielle came to Green Valley in August 2020 as a senior at South Carroll High school. She took agricultural science all four years and learned a lot about farm animals and small animals. She has always had a love for dogs and eventually sparked her interest into Veterinary Science. She is planning to serve in the military for a while and then go back to school to become a Veterinarian. Danielle loves running, spending time with friends and family, and playing with her dog “Lexi”.

Lauren Hilleary

Veterinary Assistant

Lauren came to Green valley in September of 2021. Growing up she always had a passion for animals. She has cared for small pocket pets, dogs, cats, and horses. Lauren shares a home with three dogs, a rabbit, and a horse. She is enrolled at Frederick community college to further her education. In Lauren’s free time, you can find her painting or spending time with friends and family. 

Britney Ayala

Veterinary Assistant

Britney joined Green Valley in September 2021 as a senior at Urbana High School. Britney has always cared for animals but her interest in becoming a Veterinarian arose after she witnessed many stray and wounded dogs in Perú while visiting. She plans on becoming a Veterinarian to help as many pets as she can while also finding ways to help the stranded dogs in Perú. 

Outside of work, Britney enjoys spending time with her friends and family, playing with her dog Oreo, and traveling. 

Kennel Staff

Ryan Evangelista

Kennel Supervisor

Ryan joined the Green Valley team at the end of September 2020. He has 14 years of experience in kennel and daycare environments. Ryan has done positive, behavioral dog training at jobs which he was mostly self-taught.
Ryan has always felt more connected to animals and nature rather than human relations and dogs were most common. His first job was at a kennel which he was employed for 7 years.

Ryan’s personal hobbies include hiking, fishing, kayaking, rock climbing, martial arts/kickboxing, spending time with my wife/dog/cats, cooking, shooting.

Morgan Blood

Kennel Staff

Morgan became a part of the GVAH family in September of 2018. She is currently enrolled at Urbana High School and will be graduating in 2021. Morgan plans to further her education in medicine during college and spend summers at GVAH.

Apart from work, Morgan enjoys spending time at her dance studio, hiking, and being with friends and family.

Amy Angeletti

Kennel Staff

Amy started working at Green Valley at the beginning of December 2020 as a Kennel Technician. She has a year of previous kennel experience. Amy has been interested in the sciences and working with animals from a young age. She graduated from St. Mary’s College of Maryland in May of 2020 with a Bachelor’s in Environmental Studies, which she plans to apply to conservation work in the future. Amy’s personal hobbies include spending time with her dog, Alice, hiking, listening to Elton John, and being in the company of her friends. 

Kaitlyn Simon

Kennel Staff

Kaitlyn started at GVAH at the end of June 2021. She graduated high school last summer. She has always loved animals and has been around them her entire life. She plans to finish her program at Penn Foster and become a Vet Tech as she has always dreamed of working with animals. 

In her free time she likes to hang out with her friends and go trail riding up in Pennsylvania with her boyfriend and their jeep. Her one year old yellow lab Jackson, loves to go on these adventures with her and has so much fun. 

Bailey Waldien-Craig

Kennel Staff

Bailey joined the GVAH family in June 2021 after graduating from Urbana High School the year before. During school, her pre-vet classes strengthened her interest in veterinary medicine and animal welfare, which eventually guided her to GVAH. Having been fostering cats and kittens from the local animal shelters for nearly 10 years, Bailey was always interested in and connected with animals of all types. She plans to further pursue this interest and study animal behavior for future work. Bailey enjoys hiking in the woods, collecting and examining interesting plants and mushrooms, and building decorative terrariums as hobbies.


Sarah O’Halloran


Sarah O’Halloran has been The Groomer at Green Valley AH continuously since 1995.

Like her mother, Sarah always owned horses and dogs, they were lucky enough to keep them at their farm in U.K. At age 10 she started washing dogs to help out her mother, also a professional groomer. She practiced grooming their own dogs, who like the shoemakers children always seemed in need of a groom.

Coming to America in 1980, she met and married her husband Pete an Equine Veterinarian, they have two children. Sarah loves her job at GVAH. She’s very interested in conformation as an important aspect for the health and wellbeing of horses and dogs. She enjoys watching dog shows and looking at the latest grooming creations.

Sarah sometimes notices minor lumps and bumps or itchy ears and feet type issues as she’s grooming your dog. That’s when it’s nice to be under the umbrella of the veterinary hospital. She can look at the patient history and call the owners to see if it’s an issue the owner is aware of, or wishes the vet to look at them. She has groomed generations of dogs for more than a few owners at GVAH and never tires of caring for the sweet Doggie and Kittie friends that come in for a spa day.