Doctors and Staff

In the event of an emergency, you want experienced medical personnel working on your pet. One or more veterinarians are always staffing our clinic. Each is an experienced emergency clinician. Our veterinarians have a combined 80+ years of emergency experience.


​​​​​​​Our Doctors

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joel wolf

Tom Hansen, DVM DABVP

Dr. Thomas Hansen grew up in Northern California and earned both his Bachelor of Science (Animal Science) and Doctorate of Veterinary Medicine from the University of California, Davis. He is board-certified in canine and feline practice by the American Board of Veterinary Practitioners. His favorite areas of practice are emergency care, ultrasound, and internal medicine. In his spare time he enjoys travel, movies, aviation, and anything related to cats.

joel wolf

Dr. Joel Wolf, DVM

Dr Wolf received his B.A. in Integrative Biology from UC Berkeley and his Doctor of Veterinary Medicine from UC Davis in 2000. He completed a rotating internship in small animal surgery and internal medicine at the Animal Special Group in Los Angeles. After completing his internship, Dr. Wolf worked part time at multiple emergency and small animal general practices throughout the Bay Area. He became a full time staff veterinarian at NPVEC in 2004. When not at work, Dr. Wolf enjoys golfing, snowboarding, playing poker, and spending time with friends and family.

kelly hovde

Dr. Kelly Hovde, DVM

Dr. Hovde has been a staff veterinarian at North Pen since 1995. She is a graduate of the College of Veterinary Medicine at the University of Illinois. She completed a Small Animal Emergency Critical Care Internship from Veterinary Emergency Service in Fresno, Ca. She is a member of VECCS, PVMA, AVMA, and IAAHPC. Currently she works as a relief veterinarian at the San Jose City Shelter. She particularly enjoys geriatric medicine. Dr. Hovde lives with her cat Dino.

sara rose

Dr. Sara Rose, BVMS

Sara Rose holds a BS in Avian science from UC Davis and completed her veterinary degree in 2012 at the University of Glasgow, Scotland, graduating with distinction in pathology. Immediately following graduation, Dr. Rose finished a small animal rotating internship at a private referral center in Boston. She then went to work at an emergency and referral hospital for two years in Manchester, New Hampshire. After nearly a decade of adventures outside of her home state, Dr. Rose is finally back in the Bay Area. She became a full time veterinarian at North Pen in July 2016. In addition, she works with Well-Pet Vet Clinic in Pittsburg, CA, providing affordable preventative care and vaccines for the community; and volunteers with the spay/neuter program of BADRAP, a Bay Area-based pit-bull advocacy group. In her spare time, Sara loves to hike, camp, and kayak with her mini daschund mix Reggie. She also travels as much as possible, makes wine with her family, and gardens with her backyard chicken flock "The Golden Girls".

sara rose
Dr. Sue MacInnes, DVM
slyvia graham

Dr. Sylvia Graham, DVM

Dr. Graham has over 25 years of veterinary emergency experience and has been working at North Pen since 2003. In addition to practicing emergency medicine, she owned her own exclusively feline private practice. Dr. Graham graduated from UC Davis with a Bachelors degree in zoological science as well as a Doctor of Veterinary Medicine. She is a member of the AVMA, CVMA, the peninsula veterinary association and the Alameda County Veterinary Association. Dr. Graham is president and founder of the Association of Multicultural Veterinarians which raises funding for scholarships and mentors students from diverse backgrounds that have an interest in the field of veterinary medicine. She is a recipient of the distinguished Iverson Bell Award. Dr. Graham lives in Berkeley with her husband, two cats, three Yorkies, and one pit bull. All are rescues, including the husband.

Dr. Lilliam Alfarro, DVM

Dr. Lilliam Alfarro, DVM

Dr. Alfaro pivoted from a focus on going to law school in the span of one day due to an injured bird and has never looked back. She received her DVM from The Virginia-Maryland Regional College of Veterinary Medicine and has practiced veterinary medicine in many different contexts including shelter medicine, primary care, emergency medicine. She and her husband enjoy the company of two young sons and a daughter and a little squadron of furry companions.

Dr. Heather Burns, DVM

Dr. Heather Burns, DVM

Dr. Heather Burns, a San Francisco Bay Area native, and was born in Oakland, California and grew up in the East Bay Area. From a very young age Heather dreamed of being a veterinarian and that dream came true when she was accepted to the Royal College of Veterinary Studies in Edinburgh, Scotland. Heather graduated in 2005 and immediately commenced a one-year internship at Animal Specialty and Emergency Center in West Los Angeles which, she completed in 2006. Since completing her internship Heather has been working in both specialty emergency positions and general practice in both Southern and Northern California as well as the East coast. In 2011 Heather returned home to the Bay Area and has been a resident of the mission district in San Francisco where she lives with her two cats and her French Bulldog Josephine.

In her spare time Heather is a big horse enthusiast and plays polo and enjoys hunter/jumpers. She also enjoys being outdoors whether for camping, fishing or boating, as well as world travel, enjoys live music and all the wonderful cuisine and adventures the San Francisco Bay Area has to offer.

Practice Managers


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Tricia Mallory
Tricia Mallory, CPM, CRVT
Practice Manager

Tricia has extensive experience in the Veterinary field. Earning her Certification as a Veterinary Technician in 1993, she continued to further her career by becoming a triple boarded Veterinary Technician in Critical Care, Dentistry, and Radiology. For the past 14 years she has worked in practice management, practice development, and marketing. In 2009 she became a Certified Practice Manager.

Tricia.Mallory@northpenvet.com

Nursing Directors


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Mia Ollikainen

Shanna, RVT
Nursing Director

​​​​​​​Shanna ONeill has been working at North Pen for 2 ½ years and is a Registered Veterinary Technician with over 18 years of experience in the Veterinary field.

As an RVT, she has spent the majority of her career in emergency medicine and has a proven track record for working calmly and efficiently under chaotic demands.

In emergency clinics where the veterinary tech staff has also provided all reception duties, she has won customer loyalty by providing the caring support needed by emotional clients worried about their suffering furry friends. She had 5 furry friends of her own, 3 crazy terriers and 2 opinionated felines. Unfortunately, she lost her JRT at 18 years of age this last spring – and still misses her. She loves her field, believes in the value of continuing education for herself and her co-workers, and is passionate about ensuring quality patient care. When she’s not in the hospital, she’s enjoying the outdoors with her 2 terriers or snuggling with her 2 cats watching movies

Office Administrators


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Jennifer

Tammy
Office Administrator
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Tammy always knew she had a passion for helping people. She didn’t learn until later that much of her life’s work would involve improving the health and well-being of other people’s beloved pets, but it has become one of her passions. She has worked in general veterinary practice, emergency, and oncology, for a total of 18 years now, and continues her learning odyssey by joining North Peninsula Veterinary Emergency Clinic. She now has a dog named Apple. In her free time she loves dancing, cooking, board games and outdoor activities with her children.

Registered Veterinary Technicians


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amie chapman

Amie, RVT
Registered Veterinary Technician

Amie developed a passion for animals and knew that she wanted a career in the veterinary field at the age of 9. She first started volunteering at the Peninsula Humane Society and then decided to attend Foothill College and become a Registered Veterinary Technician. She began her career at NPVEC in 1999 and has never looked back. Through her years at North Pen she has fostered over 30 orphaned kittens, fostered 11 sick and orphaned puppies, and raised so far 13 puppies for Guide Dogs for the Blind. She and her husband are the creators of an award winning web series, Growing up Guide Pup, which chronicles the life and adventures of a puppy learning how to become a guide dog.

Marianne Lang

Brianna, RVT
Registered Veterinary Technician

Brianna has had a deep love and respect for animals from a young age. A Florida native, Brianna attended the University of Florida where she received her Bachelors of Science in Biology in 2015. It was there that she began her career in veterinary medicine as a volunteer with Operation Catnip, a trap-neuter-return clinic at the vet school. Since then, Brianna has been a veterinary assistant at several animal hospitals in Florida and the Bay Area. She has even taken her skills to spay and neuter animals in Peru! Brianna joined North Peninsula Emergency in December 2017 and has loved every minute. In her spare time, Brianna enjoys traveling with her husband, going on hikes, and starting new craft projects. She is a cat mom to one feisty calico named "Kit Kat".

Erin Ovtcharov

Erin, RVT
Registered Veterinary Technician
​​​​​​​Inventory Coordinator


Erin graduated from Cal State Hayward in 2006 with a B.A. in Theatre Production and Foothill College in 2008 with an A.S. in Veterinary Technology. Shortly after she became a Registered Veterinary Technician and has been a member of the North Pen team since 2008. Erin is known for her positive attitude and her incredible work ethic. She has a soft spot for pit bulls and guinea pigs. In fact before she rescued her two pit bulls, Sydney and Xena, Erin spend 10 years breeding and showing guinea pigs.​​​​​​​

Marianne Lang

Marianne, RVT
Registered Veterinary Technician

I’m a Bay Area native and have been an RVT for over 25yrs. I was a surgery nurse for 14yrs but found my interest to be in emergency medicine. I have 3 dogs and 4 cats. I started working at NPVEC in 2017 and have found my forever home.

Mia Ollikainen

Mia, RVT
Registered Veterinary Technician
​​​​​​​Safety Officer


Mia has been working at North Pen since 2014. She is interested in all animal life including exotics, pocket pets, wild and domesticated animals and has worked with all of them. Mia is a graduate of the Foothill Veterinary Technology program and has been a naturalist her entire life. She enjoys observing wildlife in the Bay Area and anywhere she travels. She became an RVT in 2015, is a dedicated member of the North Pen staff, and always strives to learn and grow in the field of veterinary medicine and veterinary science.

Jillian , RVT
Registered Veterinary Technician

Jillian Joined our team in the summer of 2016. Jillian became interested in helping animals after adopting a special needs dog whose care was challenging and rewarding. After helping a friend cope with a severely injured pet she felt an intense desire to help animals that were very ill or had suffered severe trauma. She decided to make veterinary care her career choice and applied to Foothill Veterinary Technician Program. Upon entering the field she worked at an impoverished animal shelter in Thailand. Since then, back in California, she has worked exclusively for veterinary emergency facilities where her skills in critical care are best utilized.

Jillian lives in Mountain View with her three cats, two dogs, and tropical fish. In her spare time, she enjoys reading and traveling.

Lynn

Lynn, RVT
Registered Veterinary Technician

Lynn spent the first 25 years of her working life doing medical research as a Ph.D. biostatistician. Then, because of her love of working with dogs as a volunteer with Guide Dogs for the Blind and ARF (Animal Rescue Foundation), Lynn went back to school to become a veterinary technician. She finished her degree in July 2018 and will take her national boards in November. Her particular interests are emergency and critical care medicine. She shares her home with Nigella, an 8-year-old golden retriever who is a retired breeder from the Guide Dog school; and Tessa, a 15-year-old mini dachshund who joined the family just 8 months ago. Outside of work, Lynn dances and calls contra dances and traditional square dances makes jewelry and takes Nigella to elementary schools and libraries where children practice reading to her.

Angela, RVT
Registered Veterinary Technician

Bio Coming Soon!

Daniel, RVT
Registered Veterinary Technician

Bio Coming Soon!

Veterinary Assistant


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Crystal Habershom

Crystal
Veterinary Assistant

Crystal joined our team here at North Pen in 2015. She came to us as a highly skilled veterinary assistant with +20 years of experience. Crystal grew up locally and graduated from Woodside High School in 1990. At 19 years of age, she started working in veterinary medicine and loved it. She works at our hospital on the evenings and weekends and at Sequoia Hospital during the day. It is kind of neat to have some of our patients get the same great nursing care and a familiar face during the day and into those late evening hours. She makes at least yearly visits to Disneyland. No matter where she is she has lots of fun, just like her young Bull Mastiff, Chai. Chai is super sweet, smart and sassy, and enjoys keeping her momma on her toes.

Elora Vold

Scott
Veterinary Assistant
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Scott graduated from Arizona State University with a B.S. degree in Biochemistry in 2015. Since then he has worked in the medical research industry focusing on both the laboratory and medical aspects of the job, while facilitating the proper humane care and treatment of all animals in research. He began working weekends with NPVEC in May of 2017. Scott is currently working towards his ultimate goal of being a DVM in laboratory animal medicine. When he has time away from his work and studies, Scott enjoys playing hockey and spending time with friends, family, and most importantly his dog, Louie.

Joseph
Joseph

Veterinary Assistant

Joseph is currently attending CCSF. He is interested in both psychology and animal sciences. Joseph has a love and passion for all animals, he hopes to be a part of restoring health and balance to both the earth and the living beings on it. In his spare time, he enjoys the outdoors, listening to music, and the company of friends.

Christina
Christina

Veterinary Assistant

Christina has been part of the Veterinary Community for several years, she joined NPVEC as a Customer Service Representative. In 2012 Christina left NPVEC, she continued to grow herself personally and professionally. Christina has returned to NPVEC as Veterinary Assistant; she is very committed to her career growth and is working toward earning her RVT certification.

In addition to her passion for helping all animals, she shares her life with her 3yr old son Jonathon. Christina enjoys being a mother, it is one of her greatest accomplishments. When Christina is not caring for animals, she loves to spend time with Jonathon, listening to music and dancing.

Lisa
Veterinary Assistant
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Bio Coming Soon...

Dr. Lilliam Alfarro, DVM

Lucy
Veterinary Assistant

Bio Coming Soon...

Dr. Lilliam Alfarro, DVM

Danielle
Veterinary Assistant

Bio Coming Soon...​​​​​​​

Dr. Lilliam Alfarro, DVM

Nick
Veterinary Assistant

Bio Coming Soon...​​​​​​​

Client Service Representatives


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Amanda Lee

Joyce
Client Service Representative

​​​​​​​Joyce has worked part time at North Peninsula Veterinary Emergency Clinic (NPVEC) as a receptionist for 17 years. Joyce also works at Stanford University Medical Center. Joyce began working at Stanford Medical 35 years ago in the heart transplant division and currently works at Stanford University Medical Center division of Cardiovascular Medicine. Joyce moonlights at NPVEC because she loves animals and wanted to combine her interest in human medicine and animal medicine. Therefore Joyce has a unique perspective on diseases that affect both humans and animals. She understands that many conditions that affect humans especially heart disease also affect animals and that many medications and treatments for animal heart disease are similar to those used to treat human heart disease.

Joyce has a Bachelor’s degree in Social Work from Eastern Michigan University, she is also certified to teach elementary school in her home state of Michigan. Joyce lives in San Mateo and when she is not working she enjoys time with family and her animal friends.

Jennifer

Jennifer
Client Service Representative

Coming Soon...

Jennifer

Serena
Client Service Representative

Coming Soon...

Board Certified Specialists


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Dr. Amy Allen, DVM, Diplomate, ACVIM
Dr. Amy Allen, DVM, Diplomate, ACVIM
​​​​​​​Internal Medicine & Endoscopy

Dr. Amy Allen received her B.S. in Biological Sciences from Stanford University and her Doctor of Veterinary medicine from UC Davis. She completed an internship and residency in Internal Medicine. Dr Allen performs in-house endoscopic procedures, which include foreign body retrieval and biopsies or sampling from upper and lower GI, rhinoscopy, nasopharyngoscopy, laryngoscopy, bronchoscopy, vaginoscopy and cystoscopy. As a board certified internist, she is also available to consult on a number of different types of cases. Dr. Allen can be found spending time with her family in the North Bay and loves to play soccer and travel.
Dr. Bill Rivers, DVM, PhD Radiology

Dr. Bill Rivers, DVM, DACVR, PhD Radiology
Radiologist

We are very pleased to have Dr. Bill Rivers as our consulting radiologist. Dr. Rivers graduated from the UC Davis School of Veterinary Medicine in 1984 and, after an internship with Dr. Steven Ettinger in Los Angeles the following year, he practiced general small animal medicine in the San Francisco Bay Area for several years. Dr. Rivers then completed specialty training and a PhD in Radiology from the University of Minnesota. He became board-certified as a specialist in Veterinary Radiology by the American College of Veterinary Medicine in 1995. After being on staff at two veterinary schools and a private specialty practice, he established his Bay Area Consulting practice in 1989. Dr. Rivers performs the more complicated ultrasound examinations on our patients. His extensive training and experience helps us to provide the highest level of care for our patients.

Carrie Jurney DVM, DACVIM

Dr. Carrie Jurney DVM, DACVIM
Neurologist

Dr. Jurney is originally from Atlanta, and graduated summa cum laude from the University of Georgia, College of Veterinary Medicine in 2005. After vet school she completed an internship at the VCA Specialty Center of Seattle and her neurology residency at the University of Pennsylvania. She was awarded her neurology diplomate in 2009 and her Advanced Neurosurgery Certificate in 2011. While at UPenn she found her love of teaching, and excelled making the often unloved doctrine of neurology both understandable and practical for her students. This skill has served her well across numerous speaking engagements, in teaching residents and while educating her clients about their pet's condition. Dr. Jurney is an enthusiastic clinician. While she enjoys all of neurology, neurosurgical procedures and neurocritical care have a special place in her heart. n 2015, she decided to combine her love of neurology, traveling and education and Jurney Veterinary Neurology was formed. She currently lives with her husband and their pets in beautiful San Francisco. In her spare time Dr. Jurney is a sculptor, stained glass artist and adventurous cook.

Dr. Bill Rivers, DVM, PhD Radiology
Dr. Dean Filipowicz, DVM, MS, DACVS
Surgeon

Dean is published in several veterinary journals, has co-authored book chapters, and has spoken at a number of conventions and symposiums. His masters research investigated an emerging type of orthopedic fixation which has since become the gold standard in human and veterinary orthopedics. Dean’s special interests include fracture management, sports medicine, oncologic and reconstructive surgery, minimally invasive surgery and advanced, multi-modal pain control.
When not at work, Dean can be found enjoying all outdoor physical activities that the area has to offer, especially if they involve water or mountains.