Meet Our Staff at Veterinary Oncology and Research Center
in West Chester & Chalfont PA

K. Ann Jeglum, VMD, Diplomate, ACVIM, Oncology

Dr. K. Ann Jeglum, V.M.D.

After graduating from the University of New Hampshire, magna cum laude, Dr. Jeglum began her journey in the field of oncology as a research assistant in tumor immunology and immunotherapy at Harvard Medical School in 1972. She took graduate studies in tumor immunology. While attending veterinary school in 1973 at the University of Pennsylvania, she continued her research endeavors as a research associate at the Hospital of the University of Pennsylvania in the Department of Gynecologic Oncology. Working with Charles Mangan, M.D., they developed the intralymphatic route for delivery of tumor vaccines as therapy for ovarian cancer in women. This approach was later used for treatment of lymphoma in dogs.

Following graduation from veterinary school, Dr. Jeglum did a post-doctoral fellowship. Her training included the Animal Medical Center in New York City, under mentor Dr. Greg MacEwen, and UC Davis Veterinary School, under mentor Dr. Gordan Theilan. Her affiliation with gynecologic oncology at the medical school remained throughout her tenure at Penn. She started medical oncology as a part of the Oncology Service at the Veterinary Hospital of the University of Pennsylvania (VHUP), under mentor Dr. Robert Brodey, one of the forefathers of veterinary oncology. In 1988, she was named a Charter Diplomate in the subspecialty of  Oncology in the American College of Veterinary Internal Medicine. She was an Assistant Professor of Medical Oncology and Head of the Oncology Service from 1981–1989 and remained on the faculty at VHUP until 1990. During that time, she held appointments at the National Cancer Institute at Frederick, Maryland; Fox Chase Cancer Institute, Philadelphia, Pennsylvania; and The Wistar Institute, Philadelphia, Pennsylvania. From 1992–1997, she was an Adjunct Associate Professor of Medical Oncology at VHUP. She continues her academic affiliation today as an Adjunct Associate Professor at The Wistar. She has lectured both nationally and internationally and has published papers on chemotherapy and immunotherapy in both human and veterinary oncology.

Dr. Jeglum launched Veterinary Oncology Services in West Chester, Pennsylvania in 1990. In 1996, Veterinary Oncology Services and Research Center (VOSRC) opened its doors as the only designated private veterinary cancer center in the region. Her research continued with the development of Canine Lymphoma Monoclonal Antibody 231, which was commercialized in the 1990s. In collaboration with Dr. Zenon Steplewski, they hold a U.S. patent for monoclonal antibodies against canine lymphoma-associated antigens. Clinical trials were conducted at VOSRC with TALL-104 cells, a novel cytotoxic cell line from a child with leukemia, which showed promising results in canine histiocytic sarcoma and osteosarcoma. VOSRC expanded in 2001 with the opening of the VOS’ Radiation Center in Chalfont, Pennsylvania.

Dr. Jeglum was funded by the Canine Health Foundation of the The American Kennel Club from 2005–2008 to study the genetic epidemiology of cancer in the golden retriever. Through these studies, heritability of lymphoma and soft tissue sarcoma has been proven in the breed and manuscripts are in preparation. Currently, she is a member of the Steering Committee for the Morris Animal Foundation’s Canine Lifetime Health Project, a prospective, lifetime cohort study designed to determine the incidence of cancer in golden retrievers and to identify genetic, nutritional, lifestyle, and environmental risk factors.

Dr. Jeglum has bred and shown dogs for more than 30 years. Cocker spaniels were her first breed but now her household has expanded with Pugs and German shorthaired pointers. Her pastimes include cooking and reading, and she has been an avid golfer since childhood.

Siobhan Haney, VMD, MS, DACVR (RO)

Dr. Siobhan Haney comes to us after practicing Radiation Oncology in New Jersey for the past 6 years. She graduated from the University of Pennsylvania in 2004, followed by a 1-year internship in rotating small animal medicine and surgery at Red Bank Veterinary Hospital. She completed her residency in Radiation Oncology at Tufts University in 2007 and is board-certified by the American College of Veterinary Radiology (Radiation Oncology). She has authored and co-authored several peer-reviewed scientific journal articles and actively participates in clinical trials. Dr. Haney is available for consultations on Wednesday in our Chalfont office. She will be planning and overseeing radiation patients along with Dr. K. Ann Jeglum.

Donna L. Lindner, DVM

Donna L. Lindner, DVM

Dr. Donna L. Lindner earned her DVM from Cornell University in 1985 and was a recipient of the 1985 Gentle Doctor Award. She performed an internship in small animal medicine and surgery at the Animal Medical Center in New York City, spent two years in private practice, and then completed a three-year animal surgery residency at the University of Illinois. That was followed by several years in academia and a decision to specialize in cancer medicine. Dr. Lindner joined VOSRC in 2000. She says her work with animals and their owners is shaped by a favorite quote from The Prophet: “Work is love made visible . . . When you work with love you bind yourself to yourself and to one another and to God.” I try to approach each new case with love, she adds.

Victoria E. Nelson, DVM

Dr. Victoria E. Nelson, DVM

Dr. Nelson graduated with the top of her class at the Oklahoma State University School of Veterinary Medicine in 1994, where she was a recipient of the Gentle Doctor Award. She went on to a one-year internship at Michigan State University and a two-year residency in internal medicine at the University of Pennsylvania. She received the teaching award for Outstanding Resident in Veterinary Medicine in both small and large animals. She maintains special clinical interests in internal medicine, including endocrinology, infectious disease, and critical care. In the field of oncology, she has particular interest in systemic manifestations of neoplastic disease, radiation therapy, histiocytic disease, and lymphoma. Dr. Nelson actively participates in the world of purebred dogs, including agility, tracking, herding, and conformation. Shelties have been a part of her life for 32 years. She is an avid gardener and baker and especially enjoys spending time with her family.

Lisa Suslak-Brown, VMD, Diplomate ACVR

Dr. Lisa Suslak-Brown earned her Bachelor of Arts from Swarthmore College 1987, and her Veterinary medical degree from the University of Pennsylvania, School of Veterinary Medicine in 1991.  She worked in equine practice Lafayette, NJ 1991-1993.  Her Radiology Residency training was at the Veterinary Hospital of the University of Pennsylvania 1993-1996.  Dr. Suslak-Brown became a Diplomate of the American College of Veterinary Radiology 1999.  She is the owner of Veterinary Radiology & Ultrasound Services, LLC since 1996.  She has provided diagnostic imaging services for Veterinary Oncology Services and Research Center, owned by Dr. K. Ann Jeglum since 1996.  Dr. Suslak-Brown has also worked in the Section of Sports Medicine and Imaging at the New Bolton Center campus of University of Pennsylvania School of Veterinary Medicine 1996-2010 as lecturer and an adjunct faculty member.  She is a member of the Board of Directors of eVetDiagnostics since 2010.

Louis H. Snijders, BVSC

Dr. Snijders graduated in 1987 from Onderstepoort, University of Pretoria in South Africa. From 1988–1995, he worked in general practice in a number of locations between the United States and South Africa since he has family members in both countries. From 1996–2007, he worked in a specialty medical and surgical referral practice in South Africa. During that time, he had extensive experience in soft tissue and orthopedic surgery. He moved back to the United States in 2007 and took a position as an emergency and critical care hospitalist at Windcrest Animal Hospital in Wilmington, Delaware. From the start of his career, he has maintained a particular interest in oncology and started training at VOSRC in 2008. He is an international fencer and was a member of the South African team at the African and World Championships in 2001. He is married with two sons.

Dina M. Schofield, DVM, Diplomate, DACVS

Dr. Schofield is originally from Chester County, Pennsylvania.  She earned a bachelors degree with a minor in genetics from North Carolina State University, thereafter she attended NCSU Veterinary School where she received her Doctor of Veterinary Medicine.  She completed a rotating internship in small animal medicine and surgery at the California Animal Hospital in Los Angeles California.  Dr. Schofield returned to the east coast to complete a 3 year residency program in Small Animal Surgery at the Veterinary Referral Center in Malvern Pennsylvania.  She worked as a small animal surgeon at a referral practice in Maryland and is  board certified by the College of Veterinary Surgeons.

Dina is dedicated to offering her surgical skills and medical knowledge for your referral patients and clients.  While research focus during her residency was on laryngeal paralysis and airway surgery she also has diversified her research experience in orthopedics with total hip replacements.   Her special interests include surgical diseases of the respiratory system (laryngeal paralysis, brachycephalic airway syndrome, lung lobectomy) surgical oncology, (reconstructive surgery, skin flaps, mandibulectomies, maxillectomies), urinary surgery (congenital anomalies, ectopic ureters, incontinence, USMI, recurrent UTIs, tumor reconstruction), neurologic and orthopedic surgery.  She has completed the Penn Hip and TPLO certification.   She is proficient in diagnosing lameness and performing ACL surgery.  Dr. Schofield’s most recent research publication is on a new surgical technique for Laryngeal Paralysis in Dogs

Jen Carroll, DVM

Jen Carroll, DVM

Dr. Jen Carroll is one of the friendly veterinarians that you will see around VOSRC. She graduated for the University Of Edinburgh School Of Veterinary Medicine with honors in 2014. During that time she received an award for her paper comparing current treatment protocols for Canine Malignant Histiocytosis. After graduation, Jen worked in Oxford, PA doing both general practice and emergency medicine. Some of you may recognize her from the time she spent here as veterinary technician prior to attending veterinary school. She was also a client here when her dog Snowy was being treated for bone cancer. Jen has always had a special interest in veterinary oncology and is very excited to be starting an oncology internship with her mentor Dr. K. Ann Jeglum. She looks forward to meeting you and your faithful companions at VOSRC.

Business Administrator

Karen L. Kohlmeyer

Karen graduated from West Chester University in 1973 with a B.S. in health and physical education. She then went on to complete her master’s degree at WCU. Karen spent eight years teaching health, physical education, and driver education at Bishop Shanahan High School in West Chester and another 13 years at Kennett middle and high schools in Kennett Square, Pennsylvania. She served as athletic director at Shanahan and successfully coached multiple varsity sports at both schools. She spent a year as a sales representative for a sporting goods company in Philadelphia between her two teaching tenures. Karen joined the formation of Veterinary Oncology Services as the bookkeeper and receptionist in 1990, having brought previous experience from another veterinary practice. She was an instrumental part of the team that built and designed VOSRC. Having had many years of public relations work and business experience, she became the practice manager and business administrator in 1996. When not at work, Karen enjoys spending time walking with her dogs, reading, and playing golf. She has bred and shown championship dogs for many years. She was an avid horsewoman, spending many years foxhunting in Chester County.

Technical and Receptionist Staff VOSRC West Chester

Kimberly A. Wilkinson-Kahn, AS, CVT

Kim grew up with all types of animals, which encouraged her to go to Harcum College where she received her associate degree in science in 1986. She went on to work as a certified veterinary technician in a number of small and large animal hospitals, attaining experience in all areas of veterinary practice. In 1994, Kim began working at VOSRC and trained under Dr. Jeglum as an oncology technician. She has an extensive knowledge base and has attended many veterinary oncology meetings over the years. She was involved in the clinical trials of lymphoma monoclonal antibody and TALL-104. She shares a passion for quality of life, having treated one of her own beloved goldens, a long-term cancer survivor of sarcoma. She oversees and prepares the equine melanoma vaccines, which are sent around the country and to Canada from the lab at VOSRC. Kim is the proud mother of two sons, Anthony and Mavrik, and is very involved in their extracurricular sports. Her family includes four dogs.


Cindy L. Carroll, RVT

After 20 years of being an FTD Certified Senior Floral Designer, Cindy decided to go back to college.  An avid lover of animals, she set her sights on a degree as a Registered Veterinary Technician.  She graduated in 2011 from Central Carolina Community College in Sanford, NC.  After living just outside Raleigh, NC for 16 years, she sold her small farm and two horses and moved back to her hometown of Downingtown, PA to be closer to her family.  She loves gardening, reading, being outside, spending time with family and playing with her “critters.”  She has two dogs and four cats that she calls her “four-legged kids.”  All of her “kids” have a special place in her heart because she rescued them all!  Her motto: “Save an animal’s life...spay, neuter and rescue.”


Kathy Carner, AS, CVT, LATG

Kathy graduated from Harcum Jr. College in 1988.  She proudly joined VOSRC in 1994 at the inception of the practice.  In 2003, she decided to pursue a career in pre-clinical research at a large pharmaceutical company.  Her passion for clinical veterinary medicine prevailed and she returned in 2011 and continues to bring laughter and good medicine to the team at VOSRC.  Kathy and her boyfriend Mark share their home with their 4 beloved dogs in Chadds Ford, PA.


JoAnn Haines, CVT, ALAT

Joann earned her associate degree in science at Harcum College, became a certified veterinary technician, and joined the staff at the University of Pennsylvania, School of Veterinary Medicine, New Bolton Center. For 19 years, she provided veterinary care for large animals, primarily equine and bovine, along with small ruminants. She enjoys working with a wonderful crew of people, the patients, and their owners and seeing the relationship the people have with their pets. Her experience in patient care is reflected in her day-to-day work. She has had many pets over the years and currently has horses, chickens, and a peacock!


Bernadette Simpkiss, CVT

In 1994, Bernadette graduated with an Associate Science degree in Veterinary Technology from St. Petersburg College in Pinnellas Park, FL. She worked mostly in general practice in every aspect of veterinary medicine. Her interests include teaching, assisting in surgery, acupuncture and exotic medicine.

She enjoys camping, exploring, gardening, music and home improvement projects. Bernadette is a proud mother of 2 sons and 3 four-legged kids. Her spare time is spent with her 2 grandchildren, family and friends.


Diana L. Warner

Diana began her career 14 years ago as a veterinary receptionist when she rescued Lady, a stray boxer/shepherd mix breed and took her to the hometown vet for a check-up. She was offered a job! Until that time, she had a busy life as a mother, cosmetologist, singer, PTA officer, Sunday school teacher, and various jobs in the local high school. She started with VOSRC in 2001 when her husband was transferred from Ohio. It is her desire to give our clients the reassurance, support, and compassion they need when going through the difficult and stressful time of hearing their family member has cancer. She feels strongly about letting the client know they have an extended family at VOSRC. The first voice a client hears when calling into the clinic to make the first appointment needs to be the one that lets them know we are here for them and they don’t have to go down this road alone, she says. She and her husband enjoy riding the country roads in their restored 1960 MG, traveling, and spending time with their two children and six grandchildren.


Debbie Perrucci

Debbie came to work at VOSRC in 2003 after having been a client of ours. Always an animal lover, she has lived with dogs, cats, birds, hamsters, domestic rats, and bunnies. She currently owns one dog and a rescued dwarf rabbit. Because she has had two dogs with cancer, she can relate to and understand the hopes and concerns of our clients. And hopefully, her compassion has made the clients’ visits to VOSRC easier.


Lisa Bell

Lisa grew up on a chicken farm in Lancaster County. Childhood dogs included a Doberman named Fritz, a German Shepard named Max and a St Bernard mix named Bruno. The farm also had 42 cats, needed for rodent control. According to her mother it was extremely difficult to keep her away from the cats and all of the animals - there was a natural attraction. She went to college at West Chester University and received a B.A. in biology. After graduation she found herself employed at a veterinary clinic in West Chester where she remained for 18 years. Through marriage, moving and children she moved on to another position at an orthopaedic practice where she enjoyed working with "people" in the medical field. Living in West Chester she found herself wanting to get back to working with "animals" and "people" - her two loves rolled up into one! Lisa is looking forward to developing relationships with the clients at VOSRC so that she can provide a comfortable experience for owners and pets as they go through patient care and treatment.


Rebecca Jones, CVT

I have always loved having animals in my life, having grown up with dogs, cats, hamsters, and parakeets (among others). I earned a Bachelor of Arts Degree with a Double Major in French and German at Ursinus College. I then quickly went on to earn a Master of Science Degree in Communication Disorders at Penn State University, and practiced as a speech pathologist for a number of years. Some time later, I realized that animal care is my true passion and returned to school to earn an Associate of Science Degree in Animal Science, becoming a Certified/Registered Veterinary Technician. I have worked in this field now for 10 years and have gained most of my experience in emergency and critical care. Most importantly, I bring my love for animals to VOSRC. I currently reside in Glen Mills with my husband, my crazy Manx cat, and my rescue dog Lucas.


Stacey Zuniga, CVT

After working in child social services for 15 years, Stacey realized her passion for animal health while walking her dog for therapy work with behaviorally challenged children. She decided to go back to school for her associates degree in applied science with a concentration of veterinary technology. She graduated and passed her boards in June 2007. She has been working as a CVT ever since starting in general practice and then moved on to oncology as she joined VOSRC in November 2016. Stacey resides with her 4 year old daughter and their dog Osito in Exton, PA after moving from Allentown, PA to be closer to VOSRC.


Technical and Receptionist Staff VOSRC Chalfont

Tracey Murphy, R.T.T.

Tracey currently works as a radiation therapist in both veterinary medicine at VOSRC, as well as in human medicine at Fox Chase Cancer Center in Philadelphia She brings cutting-edge expertise from FCCC, one of the best radiation facilities in the country. She graduated from Gwyned Mercy College and has worked as a radiation therapist for the past 19 years, eight of which have been at VOSRC. Her responsibilities include the daily delivery of the radiation treatments to your loved patients. When she is not working, Tracey has her hands full at home with her husband, four children, dog and two cats.


Mary Landis, CVT

Mary graduated in 1982 from Harcum College with an associate’s degree in animal health technology. She worked in general practice for 13 years in all areas from surgery and patient care to receptionist and office duties. She joined VOSRC in April 2002, when she became a medical oncology and radiation technician. She is nicknamed the “cat whisperer” by the girls in West Chester because of her ability to work with fractious cats. Her activities include singing in the Bucks County Choral Society and obedience/rally training with her Doberman. She is mom to a 20–year-old daughter, 16-year-old son, four cat, and two dogs. Most of her “spare” time is spent helping her son with band-related activities. She enjoys sewing, reading, and working.


Dotty Tenley

Dotty started working as a receptionist in Chalfont when the office opened in 2001. However, she worked for 10 years at the Chalfont location when it was a human radiation therapy center. She has clients who had previously been treated themselves with radiation coming back with their pets to the same facility. Dotty has an English setter named Maxwell and his mother, DeCaf. He loves to run and hunt. Also filling her busy life are three grandchildren who live close by.