Our Team

Meet Your Pet’s Surgical Team

Residency: Cornell University

Internship: Cornell University

DVM: University of California, Davis

Dr. Craig has been a Diplomate of the American College of Veterinary Surgeons since 1991. She specializes in advanced orthopedic procedures such as arthroscopy, tibial plateau leveling osteotomy (TPLO), fracture repair, correction of angular limb deformities and small breed TPLO. A leader in her field, she previously served as the President of the Southern California Veterinary Medical Association and as a member of the House of Delegates and Board of Governors to the California Veterinary Medical Association. Currently, she is the Past-President of the California Veterinary Medical Association and the current alternate Delegate to the American Veterinary Medical Association. She has also served on several working groups and committees for the American College of Veterinary Surgeons (ACVS). Dr Craig’s daughters, Alison and Annie Pankowski, are currently attending veterinary school at the University of California, Davis and the University of Wisconsin respectively.

Email: Dr. Diane Craig


Residency: Washington State University

Internship: Washington State University

BVMS: University of Glasgow, Scotland

Dr. Cambridge was awarded Diplomate status of both the American College (ACVS) and European College of Veterinary Surgeons (ECVS) in 2001. Dr. Cambridge’s talents and skills are divided into two areas. In orthopedics he has gained considerable expertise in the fields of joint reconstruction including non-cemented total hip replacement, cruciate ligament injury treatment utilizing TPLO and TTA procedures and orthopedic trauma management. In soft tissue surgery, Dr. Cambridge has developed extensive experience in surgical oncology, including thoracic, abdominal and oral reconstructive procedures. He has a special interest in the surgical management of portosystemic shunts and minimally invasive laparoscopic and thorascopic surgical procedures. His research and publications were based in peri-operative pain management and neurosurgery.

Email: Dr. Tony Cambridge

Residency: North Carolina State University

Internship: Sonora Veterinary Surgery and Oncology

DVM: University of Veterinary Sciences, Budapest, Hungary

Dr. Sebestyen became board certified by the American College of Veterinary Surgeons in 2001. He has extensive experience in soft tissue, orthopedic and neurological surgery. He has additional certifications in advanced surgical procedures such as TTA, TPLO, uncemented and cemented total hip replacement (BFX, CFX and Helica Hip) and sliding humeral osteotomy (SLO). He has a special interest in minimally invasive joint surgery such as arthroscopy and arthroscopically assisted joint stabilization. He has been routinely performing arthroscopic TPLO and TTA surgery for treating cranial cruciate ligament tear in dogs of different sizes and breeds. His clinical interest in soft tissue surgery includes oncologic, reconstructive, and endocrine surgery.

Email: Dr. Peter Sebestyen

Residency: Animal Specialty Group in Los Angeles, California

Internship: University of Florida, College of Veterinary Medicine

DVM: University of Minnesota, College of Veterinary Medicine

Dr. Thomas Keeshen graduated from the University of Minnesota, College of Veterinary Medicine in the top of his class. Following graduation from veterinary school in 2014, he completed a rotating internship and a surgery internship at the University of Florida, College of Veterinary Medicine. He continued to advance his training by completing a three-year surgical residency at Animal Specialty Group in Los Angeles, California. Prior to joining the staff at VSSOC, he was a staff surgeon for 3 years at the largest specialty practice in Australia. Dr. Keeshen was awarded Diplomate status of the American College of Veterinary Surgeons in 2021.

Dr. Keeshen has extensive experience in a wide variety of orthopedic and soft tissue surgeries. He is specially trained in managing cranial cruciate disease with arthroscopic joint surgery in combination with TPLO in both large and small breeds. His special interests include complex fracture repairs (especially ones involving joints), skin reconstructive surgery for oncologic surgery and wound management, and thoracic surgery for diseases involving the heart, lungs, and other vital organs that travel through the chest. He is also interested in minimally invasive surgery and has published a paper on minimally invasive abdominal surgery in dogs with underlying coagulopathies. 

A native Californian with roots in Laguna Beach, Dr Keeshen is an avid surfer. 

Email: Dr. Thomas Keeshen

Surgery Residency: Virginia Veterinary Surgical Associates (Small Animal Surgical)  

Surgery Internship: Dallas Veterinary Surgical Center (Small Animal Surgical)  

Rotating Internship: Oradell Animal Hospital (Small Animal Medicine and Surgery)        

Doctorate in Veterinary Medicine (DVM): Cornell University School of Veterinary Medicine

Dr. Walker was awarded Diplomate status of the American College of Veterinary Surgeons (ACVS) in 2023. Dr. Walker is originally from Rochester, NY and graduated from Cornell University College of Veterinary Medicine. Dr. Walker completed a small animal rotating internship at Oradell Animal Hospital in Paramus, NJ, a surgical specialty internship at Dallas Veterinary Surgical Associates in Dallas, TX., and a small animal surgical residency at Virginia Veterinary Surgical Associates in Richmond, VA.

Dr. Walker performs both orthopedic and soft tissue surgery. His professional interests include complex fracture repair, TPLO procedures, abdominal and thoracic surgery, oncologic surgery, and minimally invasive techniques (laparoscopy and arthroscopy). Dr. Walker completed additional training in external skeletal fixators, advanced fracture repair, advanced laparoscopic procedures, and arthroscopy and joint surgery with IMEX, AO VET, ACVS, and VA3-EF during his residency. He has published research on perioperative pain management and TPLO procedures and is a member of AO VET North America, Veterinary Endoscopy Society, and American Veterinary Medical Association.

In his free time Dr. Walker enjoys skiing and cycling, golfing, playing piano and guitar, and spending time with his wife, who is a veterinary dermatologist, and their black lab Huxley and cat Mrs. Doubtfire.

Email: Dr. Kyle Walker

To contact our client service department, please email info@vssoc.com.

VSS Management