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Sunstone Veterinary Specialists Sunstone Veterinary Specialists

Phone (503) 505‑7255 Address Portland, OR Email

Meet Our Staff


Dr. Joshua Elliott
MA, DVM, DACVIM (Small Animal Internal Medicine), Medical Director, Co-Founder

Joshua  Elliott

Raised in Hawaii and California, Dr. Elliott is a native of the Pacific Basin and loves the Pacific Northwest for its cooler climate, warm and friendly people, and dedicated pet parents.

Dr. Elliott’s higher education began at UC Santa Cruz where he earned both his undergraduate degree and a master’s degree in marine biology. He went on to vet school at UC Davis; followed by an internship and residency, both in private practice in Southern California. Dr. Elliott is a Board Certified Small Animal Veterinary Internal Medicine Specialist. He has been practicing internal medicine in the greater Portland area since 2008 when he finished his residency at the California Animal Hospital.

Dr. Elliott’s training and expertise as an internal medicine specialist allows him to focus on his patients especially complicated medical problems. While he enjoys all aspects of internal medicine, he is particularly skilled in ultrasound and endoscopy and has trained many veterinarians in these modalities. His goal is to help his patients live higher quality lives through thoughtful diagnostics and careful treatment.

Our internal medicine team is here to offer you and your pet the support you need to find a path forward. Rest assured, your pet will receive the highest level of care at Sunstone in a comfortable environment where you and your pet will feel welcomed.

Dr. Elliott and his family moved to the Pacific Northwest so that he could join a veterinary specialty practice where he could practice a high quality of medicine and be able to make a good life and a future for his family. They love all that the Pacific Northwest has to offer. Dr. Elliott especially loves snowboarding and training in Aikido. He holds a black belt in Aikido.

Dr. Regina Tobin
DVM, DACVIM (Small Animal Internal Medicine)

Regina Tobin

Dr. Regina Tobin attended veterinary school at Cornell University. Following her graduation in 1994, she completed a one year internship in small animal medicine and surgery at Angell Memorial Animal Hospital in Boston. Dr. Tobin then spent a year in general practice in the Boston area before starting her small animal internal medicine residency at UC Davis. She became board certified in small animal internal medicine in 1999. Dr. Tobin has worked in clinical practice in Oregon since 1998, with the exception of a two year period when she worked as a consultant for a major diagnostic lab.

Although she manages dogs and cats with all types of complex medical problems, Dr. Tobin is well known for her expertise in liver disease, kidney disease, gastrointestinal disease, immune mediated disorders, and hormonal diseases.

Dr. Tobin feels strongly that her role as a small animal internist is to offer clients all diagnostic options that are available for their pets, provide compassionate high quality care to her patients and support her clients through difficult decisions.

When she is not working, Dr. Tobin enjoys camping, reading and traveling. She has started horseback riding, an activity she enjoys with her daughter.

Dr. Lillian Su
DVM, MVSc, CCRP, DACVS (Small Animal Veterinary Surgeon)

Lillian  Su

Dr. Lily Su is a Board Certified Veterinary Surgeon and she is thrilled to be serving the Portland pet community at Sunstone Veterinary Specialists! She has focused her veterinary career specifically on the practice of small animal surgery since 2005.

Her training and education have taken this native Californian all over North America.

Dr. Su’s journey to become a Board Certified Small Animal Veterinary Surgeon began at UC Davis School of Veterinary Medicine. After vet school, she completed internships at Angell Animal Medical Center in Boston, and Wheat Ridge Veterinary Specialists in Colorado, followed by a fellowship at the University of Wisconsin. She completed her residency in small animal surgery at the University of Saskatchewan in 2011. Following her residency she taught small animal surgery at The Ohio State University.

Her desire to bring high quality, comprehensive, and personalized surgical care to each patient made Dr. Su a perfect fit for Sunstone. While she enjoys using the skills her years of training and education have given her, she feels her greatest success is in seeing her patients return to a normal life. To that end, she is also a Certified Canine Rehabilitation Practitioner. Dr. Su works with her clients, their primary care veterinarians, and local rehabilitation facilities to provide the very best outcomes for her patients through their post-operative recovery.

When not working, Dr. Su enjoys spending time with her perfect (but slightly naughty) herd of animals, trying out interesting places for food / drink, and exploring the mountains and rivers of the Pacific Northwest.

Medical Support Staff

BS, AAS, CVT, Internal Medicine Technician, Head Technician


Katie is the Internal Medicine Technician here at SunStone Vets. She is Dr. Elliott’s “right hand man” and works very closely with his clients and patients. She loves that she gets to play a part in the care and healing of patients but also enjoys getting to know the families that love them.

Katie started her career working in equine medicine in Arizona. She then decided to move back home to the Pacific Northwest and become a Licensed Veterinary Technician.

Katie graduated in 2009 from the Veterinary Technology Program at Portland Community College. She worked at a Portland emergency hospital during school, then worked as an LVT for 6 years at an emergency and specialty hospital in Southwest Washington. There, she gained invaluable experience in the ER before transitioning to the Internal Medicine Department the last 2 years she was there. She also graduated in 2013 with a Bachelor of Sciences in Biology from Washington State University Vancouver and is currently undergoing special training to obtain her Specialty Technician License in Internal Medicine. Katie is so excited to be a part of the team here at SunStone Vet Specialists!

Katie lives in Vancouver, WA with her husband Cory and their two cats, Mama and Zoe. In her free time she enjoys camping, hiking, gardening and running.

AA, AAS, CVT, Surgery Technician


Alicia is the surgery technician here at Sunstone Veterinary Specialists. She has been an Oregonian her whole life and is the youngest of three with two older brothers. Animals have always held a special place in her heart and she is so thankful to be where she's at today. She attended the PCC Vet Tech Program where she earned her associates of applied science in Veterinary Technology. She has been certified since 2009. She enjoys working with Dr. Su and the rest of the surgery team at Sunstone.

She has two cats; Sparrow was a rescue with one eye and Alfie was a rescue in her younger days and has two eyes! She also rescued Missy, a German Shepherd, but would love to rescue a Greyhound one day!

In her spare time she loves to fish, read, run, hike, spend time with family/friends, and hang out with her niece. She also loves the fall when she gets to work on her families pumpkin farm!

BS, AAS, CVT, Internal Medicine Technician


Jen is excited to join the Sunstone Veterinary Specialists team as an internal medicine technician on Dr. Tobin’s team. She assisted Dr. Tobin for several years prior to joining her at Sunstone Veterinary Specialists. Jen works closely with Dr. Tobin’s patients, providing personalized care for clients and their pets. Jen loves working in internal medicine and considers it an honor to help patients and their families on their path to recovery. Jen grew up in upstate New York, working in animal welfare for 5 years before completing an A.A.S. in veterinary technology at State University of New York at Delhi in 2005. She worked as a veterinary technician in emergency/critical care for 7 years both in NYC and after moving to Portland, OR in 2008. She completed a B.S. in organismal biology at Portland State University in 2013, and later that year began working in internal medicine.

In her free time, Jen enjoys cycling, woodworking and restoring her 1920s bungalow, where she lives with a shy lab mix named Adeline, a precocious beagle named Scout and a fancy long haired black cat named Jessie.

BS, Internal Medicine Assistant


As the internal medicine assistant, Colleen is usually busy helping Dr. Elliott with medical records and procedures, answering client questions and ensuring that every patient is as comfortable as possible. She takes pride in making the internal medicine team run smoothly and is extremely excited to join the Sunstone family.

Colleen was born and raised in the Seattle area and graduated from Washington State University in 2012 with a bachelor's degree in Zoology. She then moved to the Portland/Vancouver area to pursue a career in veterinary medicine. She worked in emergency medicine for two years before stepping into the field of internal medicine in 2014.

Colleen currently lives in Portland with her husband, John, and their cat, Turtle. In her spare time, Colleen enjoys reading, cooking, and cheering on the Seahawks.

AAS, Patient Care Nurse


James is our Patient Care Nurse here at Sunstone. She strives to leave the best impression possible with her patients with the hope that if their paths were ever to meet again, that pet would remember her as a friend. She takes great pride in providing the most comfortable environment possible while pets are away from home.

As a teenager, she worked as a “pack kid” scrubbing medical instruments at a 25 doctor, 24 hour Emergency Animal Hospital. She immediately fell in love with it and, through hard work, began ascending to different positions. From pack kid to doctor's assistant, then surgery assistant, and finally ICU technician. After decades of working in veterinary medicine, she took some time off to earn an Associates degree in Applied Science at Mt. Hood C.C in 2013. After graduating, she returned to a SW Washington ER/Specialty Animal Hospital dividing her time between assisting in ER, ICU and Oncology and along the way developing a special interest in palliative and hospice care.

In her spare time, she enjoys hanging out at home with her partner and their 3 small dogs, enjoying nature, watching good movies and believing in Bigfoot. She loves bugs, the smell of used comic books, and the sound of Leon Redbone. We are thrilled to have her with us at Sunstone, and we are so grateful for the ownership she has taken to provide the very best care for our patients.

Veterinary Assistant


Kathryn (Kat) is our Veterinary Assistant. She has gone by 'Kat' since she was young and growing-up, far away Springfield, Missouri. She and her boyfriend decided that they wanted to move to Portland. Neither of them had visited before, but it’s somewhere they wanted to be and something they wanted to try while they were still young. So, they packed up their bags and took off!

Kat has two cats (felines), 'Winston' and 'Izzy'. They are definitely spoiled. She loves spending time with her kitties. Kat also enjoys hiking, camping, horseback riding, and traveling.

Kat is an enthusiastic Veterinary Assistant dedicated to providing the highest quality care to both pets and their people. Her passion for animals and awareness of their needs allows her to succeed. She has loved working with animals and has been a Veterinary Assistant since 2011. Kat plans to become a Certified Veterinary Technician. She loves working as part of a team and helping others out in any way she can.

Internal Medicine Assistant


Stephanie joined the Sunstone family as our Internal Medicine Assistant on Dr. Tobin’s team. She feels privileged to join the Sunstone team and to continue working with Dr. Tobin and her technician, Jen. She worked in general practice for 5 years before she felt compelled to transition into internal medicine, where she could provide more personalized quality care to her patients and their humans. She graduated from Eastern Washington University in 2012 with her degree in Wildlife Biology and spent several years volunteering and interning at zoos in Europe and the U.S. She is also currently in school to become a licensed veterinary technician.

Stephanie and her husband have “his and hers” dogs. Stephanie’s dog is the most beautiful, most perfect Siberian husky on earth named Tasha, and her husband John has an Australian Kelpie named Sam.

In her free time, Stephanie likes watching and identifying birds, taking leisurely strolls with Tasha, hiking and watching tennis and Lifetime movies.

Administrative Staff

Marie Xavier
BFA, CVT, Practice Manager, Co-Founder

Marie  Xavier

Marie Xavier has worked in the greater Portland area since 1997. She spent 10 years at DoveLewis Emergency Animal Hospital. At Dove, Marie was able to combine her love of design and space planning while working as the Project Manager for the new DoveLewis Northwest location in 2005. Following the construction of the new hospital, Marie worked as the Operations Director for several years.

In late 2007 she was recruited to build a new specialty practice in Southwest Washington. During her tenure as Hospital Director, she opened a new practice in Seattle, built a new 12,000 square foot veterinary medical facility in Vancouver, WA. She hired many wonderful and talented people growing the collective staff, in Vancouver and Seattle, from 19 people to over 120 talented people.

In mid-2015 Marie formed Sunstone with Dr. Josh Elliott. Together they envision an environment where management systems and veterinary leadership make positive a difference in the lives of their employees, clients, and patients.

Today, she is happy to be a business owner, working diligently to create a culture that the Sunstone staff proudly represents.

Marie enjoys spending her free time renovating her house, gardening, or enjoying the beach with her wife and their dogs.

Social Media Coordinator


Sarah joined the team at Sunstone in the summer of 2016 as our Referral Coordinator, and has recently changed roles to become our Social Media Coordinator and Relief Referral Coordinator. She has a background in client services and administration in both the veterinary field as well as other customer service industries. She enjoys being a "people person" and is passionate about making owners feel comfortable when they walk through the door. In addition to working at Sunstone, Sarah runs a successful social media marketing business as a top leader for an international cosmetics company. She is also a full time college student, working to complete her Bachelor's degree in Marketing. Sarah will be working behind the scenes on our social media channels as well as helping wherever she is needed with hospital support.

Sarah grew up just outside of Atlanta, Georgia. She fell in love with the beauty of the Pacific Northwest after visiting family here and decided this was home, she now lives in Camas with her two daughters. With any "down time" life allows, she enjoys outdoor adventures, gourmet cooking, building Lego cities with her daughters, and relaxing with a glass of good red wine.

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