Meet the Team

Meet the Team

Our philosophy at Twinbrook Animal Clinic, Inc. is to Treat all patients with the highest levels of compassion and understanding; Work hard to provide the highest quality care available; Inform and actively involve all clients in the treatment and care of their pets; Never be afraid to go the extra step to improve the patients’ quality of life; Bring owners and their pets closer together; Remain dedicated to the continuous education of our staff on the most recent and advanced techniques in veterinary medicine; Offer preventative health care for the optimal maintenance of the health of our patients; Operate in a courteous and efficient manner and Keep the patients our top priority at all times.


Dr. Janine  Callen <br> DVM, CCRT, CMT photo

Dr. Janine Callen

Dr. Callen is the owner of Twinbrook Animal Clinic, Inc. She is a 1994 graduate of Purdue University College of Veterinary Medicine. She practiced in Vermont for 2 years, then in Pittsburgh for 1 1/2 years before purchasing Twinbrook Animal Clinic, Inc. in 1997. Dr. Callen studied Physical Rehabilitation with the University of Tennessee and the Canine Rehab Institute and is a Certified Canine Rehabilitation Therapist as well as a Canine Massage Therapist. She provides Rehabilitation Services through Therapeutic Options at Twinbrook Animal Clinic, Inc. Dr. Callen lives with her husband, 4 dogs, 1 cat and 3 horses. If she has spare time, she enjoys trail riding and Cowboy Mounted Shooting.

Dr. Laurie  Schessler <br> DVM photo

Dr. Laurie Schessler

Dr. Laurie Schessler has been an Associate Veterinarian with us since August 2003. She received her Doctor of Veterinary Medicine degree from Purdue University College of Veterinary Medicine in 1995. Dr. Schessler worked as a small animal practitioner in the surrounding Pittsburgh area for 8 years prior to joining the Twinbrook team. She lives with her husband (also a veterinarian), 3 children, a dog and a cat. Dr. Schessler keeps busy with her children’s activities and also enjoys running, camping, being outdoors, scuba diving and spending time with her family.

Dr. Shawna  Rau <Br> DVM photo

Dr. Shawna Rau

Dr. Shawn Rau has been an Associate Veterinarian since June 2008. She received her undergraduate degree from Cornell University and Doctor of Veterinary Medicine degree from The Ohio State University in 1998. After graduation she worked in a small animal practice in Boston for 6 1/2 years before returning to her hometown of Pittsburgh. She lives with her 2 dogs, 2 cats, 2 lizards, 1 snake, and 8 tanks full of fish. Dr. Rau keeps busy with her family enjoying all indoor and outdoor activities and sports (as a spectator and participant), good food, and taking advantage of all the great arts and entertainment of Pittsburgh.

Dr. Leeann  Oliver <br> DVM photo

Dr. Leeann Oliver

Dr. Leeann Oliver as been an Associate Veterinarian since 1999. She graduated from Tufts University of Veterinary Medicine in 1996. She has lived and practiced in Butler County since graduation. Dr. Oliver lives with her husband, 2 sons, a dog, and a cat. She is interested in many aspects of traditional medicine.

Office Manager

Katie  photo


Katie has been working in the veterinary field since she was four years old and recently joined the Twinbrook crew during Covid in 2020 as a manager.  She enjoys quilting, art, gardening, spending time with her family at the lake, and her work. “Our clients are the reason I love my job.  I love talking with them, getting to know them and their families – including the 4 legged members, of course.”   She shares her love of the profession with her husband, 3 kids, 2 cats and a Shih tzu that thinks he’s a hunting dog

Customer Service Representatives

Nicky</br> Lead Customer Service Representative photo

Lead Customer Service Representative

Nicky is a fulltime Lead Client Service Representative who joined the team in 2015. She has grown up in the industry and thoroughly enjoys helping to care for every animal that comes into the clinic. She continued her education, while working fulltime, and recently achieved her bachelor’s degree in Criminal Justice from Point Park University. She is also a volunteer firefighter and first responder. She enjoys the outdoors and spending time with her family, friends, and animals in her spare time.

Andrea  photo


Andrea is a full time Client Service Representative who joined the team in July of 2021. She found her love for pets working as a grooming assistant for 4 years. In her spare time she enjoys, crafting, hiking with her 3 dogs, and gardening!

Lin  photo


Lin is a full-time Client Service Representative who joined the team in the middle of COIVD in 2020. She has high compassion and care for every pet that comes through the door. She previously groomed for 26 years and has since changed to fulltime CSR indefinitely. In her spare time, she enjoys spending time with her family and animals: chickens, ducks, cats, and dogs.

Jessica  photo


Picture and Bio coming soon

Veterinary Technicians

Carly </BR>Lead Technician photo

Lead Technician

Carly joined our team in May of 2012, after attending the Vet Tech Institute of Pittsburgh and receiving her certification. She enjoys doing crafts (painting and cross stitching), gardening, and cultivation of Bonsai’s. She also loves spending time with all her animals; dogs, cats, snake, and a turtle. 

Laura  photo


Laura joined the Twinbrook Animal Clinic, Inc. team in November 2001 as a part time veterinary technician, then became full time in June 2002. Laura is a Certified Canine Rehabilitation Assistant and a huge part of Therapeutic Options at Twinbrook Animal Clinic, Inc. She graduated from LaRoche College with a BS in Graphic Design and upon graduation she moved to Anchorage, Alaska, to work with a Civil Engineering company. She returned to Pennsylvania two years later to continue her career. After raising her family she decided to change careers to pursue her passion in the veterinary field. Laura and her family show Vizslas and Beagles in AKC conformation.

Carrisa  photo


Carrisa joined joined our team in December of 2020. She has been a devoted technician for 7 years working in animal rescue. She has 2 dogs, 10 cats and 5 turtles. Fun facts about Carrisa is she minored in Japanese, she loves hiking in her free time, and her passion is animal rescue.

Angie  photo


Angie joined our team in 2016 starting as a kennel assistant. She has since cross trained and is now a full-time technician. In her spare time, she enjoys, watching football, playing guitar, reading, and drawing. Angie has a cat named “Mr. Borden” who was found in a Sheetz parking lot on her way to work!

Kennel and Cat Boarding

Sarah</br> Lead Kennel Attendant photo

Lead Kennel Attendant

Sarah joined the Twinbrook team in August 2012 as part of our kennel staff but also helps to fill in as a technician when needed. She is a 2010 graduate of Thiel College with a BA in Biology and minor in Medical, Wildlife Biology, and Coaching. Sarah has a black Labrador named Luna, a rabbit named Crosby, and 3 turtles. In her free time, she likes to compete in 5K runs and half marathons as well as cheer on the Pittsburgh Penguins and Virginia Tech Hokies! Sarah also works part time as a horticultural laborer at Gumto’s Greenhouses, Inc. in Renfrew.

Coralie  photo


Coralie started working at Twinbrook Animal Clinic, Inc. in March 2002 as a full-time receptionist but has since transitioned to weekend cat boarding attendant. She graduated in 1979 with a BS in Equine Management. Before returning to the Butler area, she owned and operated a horse training/breeding farm in Michigan for about 20 years. She has multiple dogs and cats she has rescued and cared for over the years that she shares her home with!

Liz</br>  photo


Liz is a full-time kennel assistant who joined the team in 2019. She is currently attending San Juan College to become a veterinary technician. In her time off she enjoys outdoor activities, playing sports, playing videogames, and doing activities with her animals. Liz lives with her “petting zoo” filled with dogs, cats, fish, ducks, chickens, and a hamster. A fun fact about Liz is she raises honeybees, and all the hives are named based on a place in the Marvel Cinematic Universe.


Laurel  photo


Laurel was hired in January 1998, and is the Twinbrook Animal Clinic, Inc. Groomer. She is accomplished at grooming all breed types. In her spare time, she enjoys being with her family of four daughters and five grandchildren, beekeeping, play music, and being with her animals (Tenney her Vizsla and her chickens)!

Maddie  photo


Maddie’s dog grooming career started when she was 15 years old as a dog bather. In 2015, she graduated from dog grooming school and has done it since. She lives in Butler with her daughter, 3 dogs, and 2 horses. In her free time, she enjoys hiking with her pups and riding her horses. She works Tuesday’s and Thursday’s, and always accepting new clients!

Twinbrook Animal Clinic

1120 Pittsburgh Road

Valencia, PA 16059

For general information, questions, appointment requests, call us at:

Email Us: [email protected]
Fax: (724) 898-2318

(Only Open 1st & 3rd Saturdays of the Month)

Sunday Closed

Monday 8:00am - 8:00pm

Tuesday 8:00am - 4:00pm

Wednesday 8:00am - 4:00pm

Thursday 1:00pm - 8:00pm

Friday 8:00am - 4:00pm

Saturday 8:00am - 12:00pm