Meet the Team

Dr Cassie O'Callaghan
Veterinary Director | Mon, Thu, Fri & Sat
Dr Cassie has been with us for almost a decade, after working at a practice in the Upper Hunter. She enjoys consulting and has completed post-graduate study in Anaesthesia and Feline Medicine through the University of Sydney. She is also certified as a Low Stress Handler™. In her spare time she enjoys pampering her ragdoll Luna, scuba diving and serving with Marine Rescue NSW.

Dr Heiley Fan
Senior Veterinarian | Mon, Tue & Fri
Dr Heiley joined us in June 2025 and has a special interest in both soft tissue and orthopaedic surgery. In her spare time she enjoys spending time with her husband, baby daughter, 2 rescue cats (Archie + Goma) and her very fancy reef tank! Dr Heiley is also available for consults in Chinese if preferred.
**Dr Heiley 能以廣東話或普通話進行獸醫諮詢**

Dr Jane Rickard
Founding Veterinarian | Tue & Wed
Dr Jane, better known as 'Aunty Jane', is the founder of Hills District Veterinary Hospital. She has a strong interest in orthopaedic surgery, sports rehabilitation, physiotherapy and chiropractic services. In her free time she is heavily involved in dressage and also loves to ski when on holidays. She lives with her husband, her two sons who come and go, her horse (Lorenzo), and an assortment of chickens.

Olivia Gillett
Practice Manager
Olivia is a qualified Cert IV Veterinary Nurse who has worked in specialist hospitals. She has a cat called Danni who is a sassy-pants and loves bringing in leaves and bugs as gestures of her love. Olivia is a very friendly and compassionate person who will always greet you with a smile and makes sure your pet gets lots of love and attention whilst staying with us.

Hayley Newman
Head Veterinary Nurse
Hayley has her Cert IV in Veterinary Nursing and loves all animals; but her favourite would have to be dogs. She has a goofy Groodle called Benson who is a regular at the local dog park and often runs into patients. Hayley loves to help others around her and is always willing to learn and pick up new skills to expand her knowledge about animal care.

Alicia Clemie
Veterinary Nurse
Alicia is a qualified Cert IV Veterinary Nurse. She has been working in the animal care industry since 2005 & Nursing since 2018. She has 4 cats, a Kelpie, a Frenchie & a pygmy bearded dragon at home. Alicia loves dentistry and assisting in orthopaedic surgeries. In her spare time, she enjoys bush walking with her kids.

Hannah Mowen
Animal Attendant
Hannah works part-time at our hospital as an animal attendant. She has no pets at home (yet!) but enjoys feeding cockatoos and other wild birds on her balcony. In her spare time she enjoys studying wildlife, horse-riding, drawing, taekwondo and wildlife photography. A fun fact about Hannah is that she is a published children's book author. She is also a huge Disney fan!

Dotty
Head of Upstairs Operations
Found behind the shops in Oakville at the end of 2014, Dorothy/Dotty came to us at just a few weeks old. She was underweight, covered in fleas, riddled with worms and full of cat influenza. The rest is history as she immediately made herself at home, and has since climbed the ranks to become the unofficial boss and overseer of the day-to-day upstairs clinic activities. Now in her senior years, she has settled into a quieter life, preferring to keep to herself upstairs.

Felix
Chief Morale Officer
Felix is another sick stray that ended up on our care; best known for his love of food, his impressively well-rounded physique, and his tendency to involve himself in absolutely everything. He takes quality control very seriously (particularly when treats are involved) and is hence on a perpetual diet. He can usually be found in reception greeting both people and pets, largely to ensure he receives the level of admiration and attention he believes he deserves.
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