Meet our Staff

Dr. Susan Keeney has practiced small animal medicine since 1995, all except 2 of them in Las Vegas. Her particular interests include internal medicine, particularly endocrinology (hormone medicine, such as diabetes, thyroid problems, and steroid issues), as well as spaying and neutering to help prevent pet overpopulation. Dr. Keeney believes in training, socialization, and preventative medicine and strives to provide high-quality and patient-friendly service. She loves hiking, reading, and spending time with her pets. Joie, a food-motivated 12-year-old Rottweiler Mix, Ultimate, a 9 1/2 year old frisbee chasing Border Whippet Mix, Ozzie, Dobby, a 9-year-old vocal Dachshund Mix. All of them insist on coming to work with her.  Dr. Keeney can be reached by email at [email protected].

Inspired by a family veterinarian, Dr. Aleksandar Janjic knew from a young age that he wanted to dedicate himself to the challenging yet rewarding field of veterinary medicine. He graduated from the Faculty of Veterinary Medicine at Belgrade University, Serbia. After moving to the USA ten years ago, he gained valuable, hands-on experience in every position within an animal hospital—from kennel attendant to Licensed Veterinary Technician—before earning his DVM license via the ECFVG program. Dr. Janjic's clinical focus areas include surgery and ophthalmology. In his personal time, he enjoys traveling and is a lifelong enthusiast of basketball.

Michael joined our team in November 2022. He has over 20 years of service in the veterinary field. For the last five years, he’s held the role of Practice Manager. Outside of the clinic, you'll find him hanging out with his wife, two kids, and a wild bunch of pets: two dogs, two cats, fish, spiders, snakes, and lizards.

Marie has been in the vet field since 1999. On her off time, she enjoys fishing, thrifting, gardening, and spending time with her husband, Frank, and her fur baby, 12-year-old mutt Ringo.

Pamela has been with Siena originally in 2007. She recently rejoined the team in 2018. Pamela has been a receptionist in the animal field for 26 years and has dipped her toe into human medicine- oral surgery- for 13 years. Often working both fields at once! Pamela is a workaholic who loves her 2 Dobermans, Bane, 8 years old, and Freya, 7 years old.  She enjoys watching football (Go Cowboys!), Hockey, and NASCAR.  

DeeDee has been with Siena since 2022. She originally went to City College of San Francisco for Criminology, but in 2005, she took a job as a receptionist in the Veterinary Field and has loved it ever since. DeeDee has had other jobs in customer service but the animals and the pet parents won her over. DeeDee has two fur babies of her own; Marshmellow, the 1 1/2 year old 'Zoomie Princess' and 4 month old 'Troublemaker', Jelly Bean.  

For over 10 years, Jaime has dedicated herself to helping animals, finding immense joy in watching them grow and ensuring their well-being. Her two dogs and two cats truly make her heart full.

Autumn has been with Siena Animal Hospital since October 23, 2023.

Emily has been with Siena Animal Hospital since June 13, 2018

Ryan is pursuing his dream of going to veterinary school. In his free time, he enjoys traveling, bowling, and cheering on the Lakers, often with his two dogs by his side: Dexter, a 10-year-old Pitbull, and Coco, a 3-month-old Chihuahua.

Jessica balances her love for the outdoors as an avid hiker with her passion for animal welfare, specializing in feline medicine. Her commitment extends beyond the clinic, as she regularly volunteers with local feline rescue groups to improve the lives of cats in need. When she isn't on the trail or working with rescue animals, her personal pack includes two loyal dogs—Dallas, a Great Dane/Retriever mix, and Legend, a Doberman/Pit Bull mix—along with a few lovable misfit kitties.

Gisselle has been working with animals since she was a toddler, which has given her a lifetime of experience in animal care. She is a dedicated pet owner to a diverse collection of animals, including six dogs and three cats. Her personal menagerie is expansive, currently featuring mammals, arachnids, and fish, with plans to continue expanding her knowledge and collection.

Mario was born in the Philippines, raised in West Germany, and now lives in Las Vegas. He spends his free time hiking and riding his quad. Mario is married to a beautiful woman and treats her and her 2 boys with all the love and kindness he shows the Siena boarders.  He recently got Frankie, a sweet 8 year old Maltese Mix that he brings to work on occasion. 

Akeem is a California native who was raised in Las Vegas. He has a deep affection for dogs, including his own beloved companion, whom he considers a member of his family.  In his free time, he enjoys gaming, soccer, movies, and anime. A random fun fact about Akeem is that he strongly dislikes raisins.