Meet The Team

  • Louisa Asseo, DVM, DABVP
    Medical Director

    Dr. Louisa Asseo grew up in sunny Southern California. As a child, her love for animals and a passion for science made the decision to pursue a career in Veterinary medicine a “no brainer”. She graduated with a bachelors in General Biology from UCLA, and then received her DVM degree from UC Davis in 2002.

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  • Nathalie Petersen, DVM
    Veterinarian

    Dr. Nathalie Petersen grew up in Atlanta, Georgia and spent her summers in rural Michigan, where she developed a love for animals and nature. Her mother, a human physician, encouraged her to choose a career in which she would find joy in her work. It only made sense that Nathalie pursue her dreams of becoming a veterinarian. She graduated from Michigan State University in 2006 with a bachelor’s degree in Environmental Biology and Zoology. She received her veterinary degree from Louisiana State University in 2011.

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  • Ashlie Thrasher
    Hospital Manager, Veterinary Nurse

    Ashlie has always known that she wanted to work directly with animals and help nurse them back to health. She has been in the veterinary field since 2005, working in general practice, as well as directly with animal rescue groups. 

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  • Nikki Palmer - Heredia
    Customer Service Representative

    Nikki grew up on the tough streets of Oakley, California. She has been in the Veterinary field for 12 years and has known Dr. Asseo the whole time.

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  • Samantha Kartes, RVT
    Veterinary Nurse

    Samantha has been an RVT since 2013. After graduating from the Mesa college animal health technology program, she started her first job as an exotic animal RVT at the Rancho San Diego animal hospital. She has loved being an RVT ever since. 

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  • Stephanie McClure, RVT
    Veterinary Nurse

    Stephanie is a local, having grown up in Orinda. She has been in the Veterinary field for over 19 years. She has seen and done a lot but is always eager to learn more.

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  • Irene Troy, RVT
    Veterinary Nurse

    Irene was born and raised in the Bay Area and has chosen to be surrounded by animals her entire life. She actually majored in English at UC Davis, but it was still no surprise when she became a vet tech 10 years ago. She immediately had an intense passion for the job, which has never left. Irene considers herself to be incredibly lucky to have found a job that allows her to be of service to animals as they have truly enriched her life and changed it for the better. About 5 years ago, she took the steps required to become a RVT so she could continue to grow in her career and best help the animals that she works with. She has gained experience in general practice, emergency medicine, critical care medicine and internal medicine during her time as a technician and she loves the opportunity to work with the exotic animals we see at Oasis Veterinary Hospital. 

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  • Audrey Pangelinan, RVT

    Audrey has lived most of her life in Vallejo with a passion and love for animals. Growing up, she’s always aspired to work in a veterinary hospital so she can share that same passion with like minded people and help pets who need it most. 

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  • Elizabeth Mayland, RVT
    Veterinary Nurse

    Elizabeth started working in the veterinary field at age 19. She continued her education in veterinary nursing over the years, while also getting her BA in Psychology with her interest focused on teens. Her favorite part of the job is connecting with the patients in a way that builds trust, so treatments can be completed with the least amount of stress possible. She also loves getting to know the many different personalities of all the animals, and to celebrate them for what makes each of them special.

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  • Rosa Hiraga, RVT

    RosaNeva was born and raised in the bay area. At the age of 10 she'assisted' her American Bull Dog in whelping 13 puppies and that was where her interest began. 

    She earned her Associates Degree and graduated from Western Career College earning her Registered Veterinary License in 2005. She has worked in all areas of Veterinary Medicine from being an ICU nurse, lead surgery technician, receptionist and Office Manager. Rosa Comes to Oasis for a new adventure surrounding her with all types of new things to learn. She Bringsher Great Spirit and knowledge as well as she strives to teach others to the team. 

    Her number one love and priority is her family. Which consists of 2 boys, a pitbull, and the oldest of the children is their cat named Doodie. She loves to pass time staying active, gardening, and cooking.

  • J.C. Alvarado
    Veterinary Nurse

    His name is Jeancarlos, but he goes by J.C. because it seems easier for most peole to pronounce. J.C. joined the Oasis family in 2018. Before joining Oasis, he worked at an animal shelter in San Jose prior to beginning his vetmed career at another local hospital. J.C.'s long-term goal is to become a vet, and working in the field has simply confirmed that choice. 

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  • Haleigh Morrissey
    Customer Service Representative / Veterinary Nurse

    Haleigh was born to a pack of five and raised locally in Clayton, Ca. From the earliest of ages, Haleigh had a very special bond and love for animals. Her family always had a household full of dogs and cats, which they rescued from local shelters. Haleigh moved to San Diego in the early 2000s and spent six years enjoying the sunny beaches of San Diego.  Haleigh worked primarily as an esthetician before making the decision to chase her life long passion of caring for animals.

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  • Krishna Tesar
    Customer Service Representative / Veterinary Nurse

    Krishna originates from the state of Iowa. Her love of all things animal, as well as her talent for great customer service, brought her into the Veterinary field 17 years ago. Of those 17, she has worked with Dr. Asseo for 11 years.

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  • Haley Hearn
    Veterinary Assistant

    Haley has known from as a child she always wanted to be around or work with animals. Her love came from being at her grandmothers house where there were always animals of all sorts.

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  • Claire Smithey
    Veterinary Assistant

    Claire was born and raised locally in the Bay Area. Since before she could walk she had a love for animals. As an infant, she fell in love with the family's 90-pound dog. Claire’s love for animals deepened through her childhood as did her care and compassion for animals of all species. Starting at a young age, she volunteered at a local animal shelter. As a teenager, she worked with many four-legged friends at a dog boarding facility. Claire has been a pet sitter for numerous families in her neighborhood many times. 

    She is a proud guinea pig, rabbit, and hermit crab mom to Daisy, Violet, and Shelley. In her spare time, Claire enjoys gardening, yoga, hiking, and any beach! Claire feels so honored to be a part of the Oasis team and truly loves helping care for all of the different species who come before her!

  • Zoe Sanders
    Kennel Tech/ Veterinary Assistant (In Training)

    My name is Zoe Sanders and I grew up into a house full of animals. Ever since I was born I’ve always been around so many different animals and always knew that I was meant to help animals.

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  • Hitch
    Certified Veterinary Hospital Troll

    Hitch joined the Oasis team as a kitten in August 2017, after 'hitching' a ride to the hospital under the hood of a car. 

    Hitch's primary duties include walking around the back areas of the hospital showing off his obnoxiously large and fluffy tail, stealing bugs from our reptile patients, and lounging on Dr. Asseo's desk on sunny afternoons. 

    In addition, Hitch takes on many of the PR duties for the hospital, through his personal Instagram page at https://www.instagram.com/hitch_thehospitaltroll/

Location

Office Hours

Our Regular Schedule

Office Hours

Monday:

8:00 am-6:00 pm

Tuesday:

8:00 am-6:00 pm

Wednesday:

8:00 am-6:00 pm

Thursday:

8:00 am-6:00 pm

Friday:

8:00 am-6:00 pm

Saturday:

Closed

Sunday:

Closed

Contact Us

We look forward to hearing from you