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!


Elaine Segretto

Hospital Administrator/Manager

Elaine came to Green Valley in September of 2003 after realizing she wanted not just a job but a career that she was passionate about. She has worked in all areas of the hospital but truly loves her duties as a manager and continues work as a technician. Elaine loves working complex cases with our doctors and the rewarding feeling of making pets happy and healthy again. She also has a special interest in canine behavior, nutrition, and orthopedic medicine and surgery.

Elaine grew up in Silver Spring Maryland and is an alumnus of the University of Maryland College Park. She previously assisted with the breeding, raising, and training of German Shepherds. She loved it even though it is a lot of work! At home, Elaine enjoys spending time with her husband, daughter, their German Shepherds, as well as their cat who was adopted from GVAH. Elaine enjoys taking her dog out to the park for a run or swim in the stream. For her, there is nothing like the bond between an owner and their pet. Elaine loves what she does because she loves helping to make that bond stronger for our clients.

Sara Kieffer

Assistant Hospital Manager/Veterinary Technician

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.

Lexie Mason

Assistant Hospital Manager

Lexie started at Green Valley in March of 2014. Lexie studied Business Administration & Management at Frostburg State University and plans to continue furthering her education as both a technician and an administrator. Lexie has a special interest in surgery and emergency medicine and enjoys helping patients in need. Her passion for animals started as a child growing up with every animal her parents would let her keep from rabbits, newts, gerbils, toads, fish, cats, dogs, and her favorite of all, horses. Lexie has been riding horses since she was 3 years old and enjoys riding and competing when she can. Lexie’s personal hobbies include boating, crabbing/fishing, visiting breweries, traveling, cooking, and working out.

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.


Katie Busick

Medical And Kennel Supervisor

Katie started at Green Valley as a senior in High School in 2004. She worked in the kennel for a year and a half, then transitioned into the hospital by 2006, where she worked until 2009 when she got married and moved to Ft. Stewart, GA. Katie worked as a technician at a clinic outside of Savannah, GA, and had the opportunity to see a lot of things that she would have never experienced here in MD!

When her husband’s Army contract ended she moved back to the area and returned to work at Green Valley in February 2013. Katie was promoted to Medical Supervisor shortly after returning and then promoted to Medical and Kennel Supervisor in 2018.

Katie has a particular fondness for veterinary dentistry. She is currently enrolled in Penn Foster’s Veterinary Technology Program and anticipates graduating soon and earning the title of RVT.

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

Veterinary Technician

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

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.

Ashley Phillips

Veterinary Technician

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.

Amy Morrisson

Veterinary Technician

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


Marya Asad

Veterinary Assistant

Devin Wynne

Veterinary Assistant


Lisa Seabolt

Receptionist/Patient Care Coordinator/Supervisor

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.

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.

Sarah Colvin


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.

Alice Lindsey


Kennel Staff

Brianna Mallick

Sara Schueler

Madison Lehman

Travis Warden


Sarah O’Halloran