About Us

To fulfill our mission in bringing you affordable cutting-edge specialty care, our team has accumulated experience in 3 continents: Australia, United Kingdom and the United States of America. The founder, Dr Andrew Scott Levien has worked in some of the most prestigious veterinary hospitals in the world and spent time at a large number of institutions including the leading veterinary universities in the UK and USA such as Cambridge University, Cornell and the University of Pennsylvania. 

Dr. Andrew Levien

Dr. Andrew Levien

Dr. Andrew Scott Levien - Specialist in Small Animal Surgery


The owner of Veterinary Specialists of Sydney, Dr Levien, is a board certified specialist in small animal surgery.

Dr Levien graduated from the University of Sydney in 2006 with first class honors receiving numerous academic awards. For the first three years of his professional career he worked as a general practitioner in Sydney while completing a Post graduate Certificate in Veterinary Studies from Murdoch University. In 2009, he moved to London to complete a one-year rotating internship at the prestigious Royal Veterinary College, University of London. Following this, in 2010, he accepted a position at Louisiana State University, USA, where he completed a surgical internship. In 2011, he commenced a three-year surgical residency at the preeminent Animal Medical Center (AMC) in Manhattan, New York. After residency completion in 2014, Dr Levien was a practicing referral surgeon in Washington DC, USA until 2017.

By virtue of passing rigorous surgical examinations, Dr Levien became a Diplomate of the American (ACVS) and European Colleges of Veterinary Surgeons (ECVS) as well as a member of the Australian College of Veterinary Scientists.

Dr Levien has been published in a number of veterinary journals including Journal of Veterinary Internal Medicine, Journal of Small Animal Practice, Australian Veterinary Journal and Veterinary Anesthesia and Analgesia. His research includes the first-ever veterinary transjugular liver biopsy series in dogs.

Versed in all complex orthopedic, neurosurgical, soft tissue (including oncologic) and interventional radiologic procedures, his special interests includes cruciate repair (TPLO/TTA), fracture repair and joint replacement (certified in total hip, micro total hip, knee and elbow (CUE) surgery). In his spare time, Dr Levien enjoys the outdoors including skiing & hiking with his rescue dog “Jesse Pinkman”.


Dr. Karina Graham - Specialist in Small Animal Medicine

BVSc (hons), FANZCVS (Small Animal Medicine)

Dr Graham, is a registered specialist in small animal internal medicine.

After working in specialty practice for eight years as a veterinary nurse, a Bachelor of Veterinary Science (Hons) was achieved through Sydney University in 2006. Dr Graham completed an internship in surgery and medicine the following year and proceeded directly into a residency training program required for specialist qualification in Small Animal Medicine through North Shore Veterinary Specialist Centre and Veterinary Specialist Centre. Additional externship training was undertaken at the University of California, Davis in cardiology and neurology in 2010. Membership to the Australian and New Zealand College of Veterinary Scientists was achieved later that year and she obtained Fellowship to the College in 2013 permitting her to become a registered specialist in Small Animal Medicine.

Dr Graham enjoys all aspects of complex medicine and has a particular interest in interventional radiologic procedures of the urinary and respiratory tracts. Outside work her life is devoted to her family, the snow and the beach.


Dr Nina Lorenz – Specialist in Small Animal Surgery

BVSc (Hons), MANZCVS (Small Animal Surgery), MRCVS, Diplomate ECVS

Nina graduated from The University of Sydney in 2006 and began her professional career working in mixed practice. Soon after Nina pursued further training by completing internships in New York and Sydney and worked as an emergency veterinarian in different Sydney referral hospitals. She continued her specialist training at the University of Liverpool, UK where she completed a residency program in small animal surgery from 2011-2014. 

Following some time in WA in a private referral clinic, Nina held a clinical position at the University Small Animal Teaching Hospital from 2016 to early 2019. In 2018 Nina became a Diplomate of the European College of Veterinary Surgeons (ECVS)

Nina has been published in VCOT, JFMS and Veterinary Record

In her free time Nina enjoys spending time with her young family, going on outdoor adventures and also has a cat, Henry who she rescued during her New York internship and who now happily lives in Australia.

In February 2019, we are happy to have Nina joining us at VSOS as staff surgeon. Nina enjoys all aspects of surgery, in particular neurologic surgery, trauma management, skin reconstruction and wound management as well as feline surgery.

Dr. Anthony Pease   DVM, MS, DACVR

Dr. Anthony Pease DVM, MS, DACVR

Dr. Tony Pease - Consulting Radiologist


Dr Pease, is a board certified specialist in veterinary radiology. 

Tony Pease graduated from the Virginia-Maryland Regional College of Veterinary Medicine.  Then he did an internship in Large Animal Medicine and Surgery at the Marion DuPont Equine Medical Center in Virginia followed by a Small Animal Internship at Affiliated Veterinary Specialists in Maitland Florida.  Dr. Pease did a residency in Diagnostic Imaging at Cornell University.  After completing the residency program, he then was an Assistant Professor at North Carolina for four years and a tenured Associate Professor at Michigan State University for 8 years.  Currently, he is the Chief Veterinary Medical Officer for WVC (Western Veterinary Conference).  Tony has been the President of the American College of Veterinary Radiology and has lectured nationally and internationally on diagnostic imaging with a focus on radiography and ultrasound.  He has had 20 research grants funded with 58 scientific articles published and 6 book chapters.  Dr. Pease’s research interest center around neurologic disease in the dog and horse using CT and MRI as well as novel ultrasound guided interventional techniques.  He is also an Associate editor for the Equine Veterinary Journal. When not involved with veterinary medicine or teaching, Dr. Pease enjoys playing ice hockey as a goalie and training for triathlons.


Value for money for pet owners and referring veterinarians

Specialists at the cutting edge of veterinary medicine

Operating with Integrity, reliability, honesty and compassion


Supporting our team member’s happiness and strengths.