Meet the Team

Dr. Nathaniel Ban

dr-nathaniel-ban.jpg I am originally from South Korea and received my Doctors of Veterinary Medicine (DVM) at Seoul National University on Mar, 2000. I also received Master’s Degree in 2002. Following school, I had worked as a chief of staff at a department of internal medicine of referral animal hospital in Korea for about five years. Since becoming a California licensed veterinarian, I have always made it a priority to keep up with the most up to date medical advances by attending veterinary medical conferences in order to deliver most accurate diagnosis and effective treatment for my patients as well as serving our clients. I also completed an externship at Animal Medical Center in New York, one of the largest postgraduate veterinary medical training hospitals in the United States. I was fortunate to have worked with 28 board-certified veterinarians, 15 interns and 20 residents at three different departments including internal medicine, critical care and emergency as well as soft tissue surgery. It was great and fantastic experience to me and definitely helped me to develop next stage of veterinary medicine.

My professional interest includes internal medicine such as endocrinology, hematology, gastroenterology, dermatology, cardiology, soft tissue surgery, dentistry and all preventive care. Preventive care is the most important veterinary field to keeping our pets healthy and living longer, happier lives. I currently live with my wife, two sons and one dog, Lilly. I love playing baseball and soccer with my children on my day off. I try to work out on a regular basis because I truly believe well balanced lifestyle makes a huge difference in my practice. My goal is to provide the best health care of your pets. I look forward to serving you and your family!

Dr. Doyi Bae

dr-nathaniel-ban.jpg Dr. Bae traveled a long way before he joined Roswinn Pet Hospital this year. Originally from Korea, Dr. Bae completed his degree in veterinary medicine in 2009 at College of Veterinary Medicine, Konkuk University. He was selected to join the intern group that year at the CM Animal Medical Center, Seoul. During his clinical training Dr. Bae decided to broaden his spectrum in the states then received his additional training at Cornell University in beautiful Upstate NY. As a general practitioner, Dr. Bae is enjoying his time providing wellness care and teaching our clients about illness prevention. When Dr. Bae finds free time outside of the hospital he enjoys hiking, playing basketball and going to the movies. And when relaxing at home he loves to read good books with a tasty cup of coffee.

  • Debbie Liebman (Practice Manager)

    I'm born & raised here in Southern California. I ride horses, love animals and spending time with my golden retriever. I've enjoyed working at Roswinn Pet Hospital for 25 years.

  • Anila Andersen (Lead Veterinary Assistant)

    Anila Andersen joined Roswinn pet hospital in 2001. A California native. She has 2 fur babies, Minnie a mischievously sweet rat terrier and a pleasantly plump kitty named Precious. She loves helping animals and enjoys learning new things every day in the veterinary field. In her free time she enjoys spending time with family and friends, reading, exercising going to concerts, and weekend getaways.

  • Alyssa Brandau (Veterinary Assistant)

    Alyssa is from the San Fernando Valley and is currently studying to become a registered veterinary technician (RVT) with hopes of graduating in 2017. She loves all animals including reptiles and other exotics. Her hobbies other than animals include singing, acting, swimming, and the occasional shopping at the mall.

  • Kimberly Jimenez (Veterinary Assistant)

    Kim Jimenez is a proud graduate of the Los Angeles Pierce college RVT program. She is currently working on getting her RVT license. She has had a strong love and passion for animals ever since she was a child, which motivated her to acquire a career in the veterinary field. She is a kind, friendly, compassionate, fun girl who is obsessed with Disney and Mickey Mouse. She has a 3 year old Great Pyrenees named Mickey whom she loves and adores. Her hobbies include playing video games, watching anime, watching Korean dramas, and baking. She enjoys making people laugh and smile and she is a wonderful addition to our team.

Office Hours


8:00 AM-6:00 PM


8:00 AM-6:00 PM


8:00 AM-6:00 PM


8:00 AM-6:00 PM


8:00 AM-6:00 PM


8:00 AM-4:00 PM