Meet our team!

Meet the Veterinarians & Team of Harmony Hill Animal Hospital! We’re pleased to provide exceptional vet care for your pets!

Kathleen Werden

Kathleen Werden, DVM

Practice Owner

Dr. Kathleen Werden has been in small animal general practice for over a decade, with specialization in dentistry, pain management, behavior, and internal medicine. She is passionate about management of complicated cases and finding creative solutions to difficult problems. Her goal is comfort and quality of care within the particular family situation. This is especially true with end-of-life care.

Read More
With a strong sense of community, Dr. Werden, along with one of her LVTs, also started a cat rescue called The Cats at Longstreet. The rescue works with cats of all ages and stages, many of which need behavioral and/or emotional rehabilitation, to find loving, lifelong homes. This work has extended into feral cat trapping and spay/neuter programs, and assisting with the placement of the occasional special dog.

Clients appreciate her candor, insight, state-of-the-art medicine, and dedication to both constant improvement in self and in standards of care, as well as the well-being of the pet and client.

Dr. Werden loves spending time with her husband and two young children. Together, they travel, hike, and get into all sorts of trouble outside in the garden and on the farm. When Mommy and Daddy have adult time, they look forward to live music, excellent food and friends, and patronizing the local wineries and breweries.

At home, the house is full of fur, a bit of controlled chaos, some dirt, and a menagerie including a senior Beagle named Abby (Crabby), four young cats: Bean Bean StringBean, Penelope Mews, T-Wrecks, Fantasia (her first FIP survivor!), and finally, three senior cats: Berlin the Terrorist (Bobo), Gibson (GibbyGibGibbs or BadCat), and DejaBoo (DejaBOOTY), all of which have entirely interesting lives unto themselves. Gibby is so interesting, in fact, that he has his own Facebook page, Diary of a Bad Cat.


Devon Cunningham, LVT

Practice Manager & Licensed Veterinary Technician

Devon had completely different plans for her life when she graduated Virginia Tech. With a Bachelor’s Degree in Animal and Poultry Sciences, she intended to pursue a career in chicken-y things. As an in-between job, she applied for a part-time receptionist gig at a local animal clinic. Once hired, she found herself not in reception, but helping more as a veterinary assistant behind the scenes. Although fresh out of college, her interest was piqued and she soon found herself enrolling in the Veterinary Technology Program at Northern Virginia Community College. She graduated the program as a Licensed Veterinary Technician and became one of only two such individuals in her practice, paving the way for better patient care and hospital standards.

Read More
In her free time, Devon enjoys reading above all else, especially with a nice, hot cup of tea beside her. We are convinced her knowledge and supply of tea surpasses most of Northern Virginia at this point. She enjoys traveling with her husband, Bryan, who often has super awesome opportunities to visit far away magical lands the rest of us can only dream of. She also enjoys gaming, spending some evenings indulging in World of Warcraft with friends. She likes computers (this is a running joke).

Devon and Bryan share their home with three cats, Luna (AKA Ooh-Ahh), Dorian Grey (AKA Dickie), and Elbow Noodle (AKA TT). She also dabbles in freshwater fish keeping, orchids, cross-stitch and too many other hobbies. The couple also has a Cavalier King Charles Spaniel, Sir Reginald Bacon, who’s primary job is professional snuggler. Reggie also has a part-time job as our designated HR representative.

In her career as a Licensed Veterinary Technician, Devon has worked mostly in private practice, but has worked in emergency and critical care as well. Since our clinic’s inception, she has focused primarily on management duties and is pursuing her practice management certification. Devon’s unwavering dedication to the clinic’s success on a daily basis provides a model of excellence to which we all strive to meet. She is the reason we have the correct medications to dispense to our ailing patients, the proper equipment to operate our anesthesia machines, oxygen to provide to our surgery and emergency patients, licensing for our x-ray machines, food for our patients, and someone to pick up our lab samples every night. Because she is so focused on our well-being as a whole, Dr. Werden is able to be a doctor first, not a manager, Kristin is able to devote her skills to patient care and anesthesia, and our blossoming student technicians are able to continue working toward their goals of becoming LVTs. Simply put, Harmony Hill Animal Hospital would not have existed, and could not exist today, without Devon.

Reginald Bacon

Sir Reginald Bacon

Human Resources

Sir Reginald Bacon leads Harmony Hill’s HR team. His door is always open for employees in need of some quiet time, and he is ready to provide emotional support snuggles when needed. He will also defend our staff from any unexpected visitors, though if they come with cookies he’s willing to negotiate. He only has our staff’s best interests at heart. He can usually be found in the clinic on duty most days, though he does tend to take Fridays off. It’s a tough job after all, and he does need his rest. Reggie also does double duty as an occasional kitten babysitter and is an excellent dog ambassador to our feline friends.



Lead Customer Service Representative

In 2012, Sierra entered the veterinary world as a receptionist and the rest is history…

Sierra has many interests outside the practice: hiking, reading, traveling, drinking tea, trying not to kill her plants, and participating in 5k/10k events.

Read More
Sierra shares her home with 2 cats, DiNozzo and Monkey Mayhem. The youngest, Monkey Mayhem, gets into literally everything and sits on top of doorways. Sierra has added child locks to cabinets and trash cans to keep her from eating inappropriate things (banana peels, flour, plants, Fortiflora packets, tomatoes…).

Sierra has exceptional attention to detail and strives for excellence in all she does. She loves to learn and is eager to train in other areas of the clinic. We would be hard-pressed to find someone as committed and passionate as Sierra to be the voice you hear on the other end of the phone when you call, and the beautiful, smiling face that greets you when you come in our front door.



Customer Service Representative

Jessie joined our team after 8 years as a stay-at-home mom. Once her son and daughter were old enough, it was time to head back into the working world. She chose Harmony Hill because she wanted to be part of a small, close-knit team and work hard for the beloved pets in her community. Jessie spent a few years walking dogs in her neighborhood, but when the pandemic hit, everyone started working from home, and she quickly found herself missing the joyful, unconditional love from those dogs every day. Now she enjoys meeting all the new furry faces in the office.

Read More
Jessie grew up with cats, dogs, and rabbits, and remembers having chickens, as well. She has always loved animals and Animal Planet is always on when she has control of the remote. Presently, much to her husband’s dismay, her family has two kitties, Felix (Feefer Beefers) and Tommy (TommyTomTommerson). These adorable brothers were adopted from the Loudoun County Humane Society and, while they are annoying at 4:00 AM, they bring the whole family a lot of joy.

Jessie’s family enjoys camping, hiking, and going to the beach. She prefers to spend her free time checking out the flora and fauna in Northern Virginia rather than going into the city. In 2020, she saved a tiny ruby-crowned kinglet that was tangled in some brush and moved a northern water snake from a busy road to the thick grass next to a creek. She is an animal lover through and through and we think she fits in just fine here. She looks forward to getting to know all of our clients and their fur-babies.

coming soon

Kristin, LVT

Lead Technician / Licensed Veterinary Technician

Bio comingsoon.



Veterinary Assistant & Student Technician

Kristina graduated high school having completed some basic veterinary courses. She knew what she wanted to do early in her education and sought out opportunities to support her interests. Those courses led to her first job as a kennel assistant. Although inexperienced, Kristina quickly learned how to be helpful beyond cleaning kennels and walking dogs. She soaked up knowledge and quickly moved into the position of veterinary assistant. In late 2018, Kristina enrolled in the AVMA accredited Veterinary Technology program through Penn Foster. She continues her educational journey in veterinary medicine and plans to become a Licensed Veterinary Technician within the next few years.

Read More
Outside the clinic, Kristina enjoys reading, hiking, binge-watching Netflix, going to movies, and attending yoga classes or getting in some regular gym time. She has a senior pup, named Abigail, who came into her life several years ago from a family member. Abby (affectionately known as Crabby…for reasons) has special needs which are closely monitored by Kristina and Dr. Werden. Bean (a.k.a. Bean Bean String Bean) is her super awesome cat. Bean has some special needs as well, but his most important qualities are his emotional support purrs and biscuit-making. Kristina has a particular interest in geriatric pet care because her first cat, Hope, was a hospice kitty that she adopted through our rescue. When Hope passed away, Bean assumed the honorable role of emotional support kitty for Kristina.

As a team, we are exceptionally proud of Kristina and her accomplishments and have enjoyed watching her develop into the excellent assistant she is today. She supports her coworkers unconditionally and is constantly moving around the clinic, caring for patients, attending to clients, answering phones, cleaning literally everything, or creating procedural documents. Kristina is a major part of the backbone of this clinic. We cannot thank her enough for dedication, eagerness to learn, and her beautiful, kind soul. She loves patients as if they were her own pets and family members. She is an exceptional individual and we are thankful for her presence every day.



Veterinary Assistant

“Hello. This is Courtney. She works here.”

Courtney may be short on words when asked to write her own bio, but man, does she make up for it by being a wonderful assistant! She has quite a bit of experience with cat rescue and is no stranger to raising orphan kittens or caring for special needs cats. Her resident cat, Bumble, assists her with teaching smol kittens how to cat. Courtney is eager to learn all she can here at the clinic. We are happy to have her on the team and grateful for all of her contributions.



Veterinary Assistant/Animal Care Attendant

In 2012, CJ graduated high school thinking she wanted to be an FBI profiler (Thanks, Criminal Minds) and started college at George Mason University. She chose Psychology as her major so she could get a good background for studying the minds of dangerous criminals and graduated with her Bachelors in 2017. While attending GMU, CJ got a part-time job at a pet store. She had always loved animals and grown up with dogs, so it seemed like a good fit. During her time there, CJ became a dog trainer and discovered that not only did she love dog training, but she also was good at it, which surprised her.

Read More
CJ had always been a quiet, soft-spoken person, but when she was teaching classes and helping pets and their people, she felt like she had a voice and could really make a difference! Eventually, CJ decided to move on, helping with her parents’ business until she had the opportunity to become a dog trainer with B.R.A.V.E. Dog Training. She still trains part-time when she’s not at the clinic, and aims to enrich the lives of dogs and their people through positive, relationship-based training.

In her free time, CJ and her boyfriend, Craig, like to spend their time watching Law & Order, eating delicious food, and going to the movie theater. They frequently go on adventures with their golden retriever, Pluto, and chihuahua mix, Joey. CJ also enjoys hiking, live music, and taking hundreds of photos of Pluto to post on his Instagram account.

During the summer of 2020, CJ was looking for another job, in addition to dog training, and was set on staying in the animal field. This was when her head trainer recommended that CJ apply to our clinic! She began her journey as an Animal Care Attendant and, from the first day, she loved it – she was cuddling cats, learning more than she could wrap her head around, and was surrounded by a supportive team. Fast forward and CJ is now learning the ropes as a Veterinary Assistant. She continues to grow every day and we are so thankful to have her on our team!



Animal Care Attendant

Ali moved to the area from Northwestern Pennsylvania in 2020. We were lucky enough to entice her to work with us and Ali has been a huge asset to our team from the get-go. She learns quickly, works tirelessly, and most importantly, she cares about our patients. Whether it’s helping to socialize a silly, hissy kitten, comforting a post-operative pup, or making sure our hospice patients have comfy bedding, we can count on her to be right there when we need her. She is a master at surgical instrument care and preparation, and is one of three individuals that can actually fold a surgical gown in this clinic. She delivers excellent patient care, including medicating our patients, and provides operational support for the entire hospital.

Read More
From scooping poop to surgical prep, Ali goes wherever she’s needed. When it comes to the day-to-day operation of Harmony Hill, Ali is an integral piece of the support puzzle for Dr. Werden and our LVTs.

Saying we are lucky to have Ali on our team is an understatement, especially since she has a Bachelor’s degree from West Virginia University in wildlife resources! That’s not surprising, though, because Ali prefers to be outside and enjoys hiking, kayaking, exploring, traveling, and all things nature. On the flip side of that, she also enjoys relaxing with a good book, snuggled in comfy blankets, with a nice cup of tea, and a lovely candle for ambience. Her favorite books and movies are in the fantasy genre and she enjoys playing Skyrim. She aspires to have a sword someday.

Ali lives with her partner and two gerbils, Tucker and Nibs, who she spoils with her cardboard creations, including fancy castles for them to explore. She doesn’t have any cats or dogs, so she spoils our patients endlessly. Our goal is to someday send her home with a furry friend that’s bigger than a gerbil.