Meet Our Team of Veterinarians and Staff

our team in libertyville, il: dr. laura brown

Laura Brown, DVM

Dr. Brown graduated from the University of Illinois College of Veterinary Medicine in 1987 after receiving her undergraduate degree in Biology at Illinois. Dr. Brown began her veterinary career in Southern California, where she was primarily involved in equine medicine for thoroughbred racehorses. She transitioned her focus to small animal medicine in 1989 when she joined Mission Animal Hospital in Oceanside, California. She remained at Mission until 1992 when her husband’s job transferred them to southeast Idaho.  While practicing in Twin Falls and Pocatello, Dr. Brown and her husband Kris took advantage of the beautiful scenery and skied when not taking emergency calls. Dr. Brown joined DuPage Animal Hospital in Villa Park, IL in 1993 (another husband job transfer), where she practiced small animal medicine and surgery. In August of 1996, Dr. Brown opened GreenTree Animal Hospital in Libertyville, and the rest is history. Thanks to the support of her husband Kris and their daughters Sara and Clare, finding work-life balance has been enjoyable. Sara (ILL-INI) and Clare (Go Gamecocks) have recently made Kris and Laura empty nesters. For Dr. Brown, keeping busy with Stanley the Golden Retriever, Brownie the geriatric cat, and getting together with friends have become the new normal.

Veterinarian / Owner

Education: U of I College of Veterinary Medicine

dr. deni iIanakov

Deni Ianakov, DVM

Dr. Deni Ianakov received her bachelor degrees in Animal Science and Veterinary Medicine at the University of Illinois. In May 2004, she obtained a Doctorate in Veterinary Medicine from the University of Illinois College of Veterinary Medicine. As a new graduate, Dr. Ianakov was excited to join our team in July 2004, where she is building on her strong interest in orthopedics and teeth cleaning. Dr. Ianakov resides in Highland Park, Illinois with her husband Luis, daughter Giselle, son Sebastian, and rat terrier, Ziggy.


Education: University of Illinois

dr. laura hardy

Laura Hardy, DVM

Dr. Laura Hardy received her Doctorate of Veterinary Medicine from Iowa State in 1986. She then completed a year-long internship at the Veterinary College of Kansas State University. Dr. Hardy has interests in soft tissue surgery, pet dentistry, and general medicine. Born in Cleveland, Ohio, Dr. Hardy has also lived in New York, Virginia, Iowa, Oregon, and California before moving to Illinois in 1990. Along with her husband Mark, Dr. Hardy shares her home with their dogs Penny and Tucker, their cats Ace and Redford, and a menagerie of fish, amphibians, snakes, and sometimes her adult children, Sam and Sarah.


Education: ISU College of Veterinary Medicine

dr. susan mckenzie

Susan McKenzie, DVM

Dr. McKenzie has been an associate veterinarian at GreenTree since March 2012. She is a 1992 graduate of Michigan State University’s College of Veterinary Medicine and has previously practiced in St Louis, Missouri and Albuquerque, New Mexico. She lives with her husband Jeremy and their two children, Ben and Jillian. Dr. McKenzie currently has no four-legged pets as Jillian is allergic to dogs and cats. Hopefully, she will outgrow this soon as both children really would like to have a dog or cat of their own.


Education: Michigan State University

dr. hai

Lauren Hai, DVM

Dr. Lauren Hai, a native of the north suburbs of Chicago, joined our team in May 2019. She obtained her undergraduate degree at Iowa State University and completed her veterinary degree at the University of Sydney in Sydney, Australia in 2014. She has worked in both emergency and general practice over the past years. She loves being a small animal veterinarian and has a passion for behavior, preventative and emergency medicine. She lives in Green Oaks with her husband Josh, their daughter Winry and their two dogs, Xena and Byron. She has many hobbies including playing video games, traveling, boating, crafting, and gardening.


Education: University of Sydney

dr. marina jaworsky

Marina Jaworsky, DVM

Dr. Marina Jaworsky joined GreenTree Animal Hospital in February of 2020. She is excited to return to her hometown of Libertyville (Go Wildcats!) after working for the past five years as a small animal and exotic animal practitioner in Elmhurst, Illinois. Dr. Jaworsky is a 2015 graduate of the University of Illinois College of Veterinary Medicine and has an interest in small and exotic animal surgery and medicine.

She lives in Grayslake with her husband, scruffy terrier, two house rabbits, and a small reef tank. Dr. Jaworsky is also a board member of the Chicago Veterinary Medical Association and Illinois State Veterinary Medical Association. In her free time, she loves to travel, read novels, bike ride, and swim.


Education: University of Illinois

courtney amber-naas

Courtney-Amber Naas, Practice Manager

From an early age, Courtney would tell her parents she was going to be a veterinarian. At 15, she started her first job as a kennel attendant for a veterinary hospital in one of Chicago's northern suburbs. This role taught her about proper care for the patients and the facility. She worked her way up to a technician assistant and eventually an unlicensed technician. Along the way, she realized she didn't want to be a veterinarian but instead, a technician. In this role, she truly felt she was an advocate and caregiver to her patients. Courtney earned her certification as a veterinary technologist in 2010.

After taking time off to raise her son, Courtney returned to general practice working in veterinary management. As a manager, her hope is to inspire, mentor and train veterinary support staff to ensure clients and their pets receive the best possible care. Her professional goal is to specialize as a Certified Veterinary Practice Manager. In her free time, Courtney enjoys gardening, photography, swimming and spending time with her son, their dog, and their two cats.

Certified Veterinary Technician

She spent 12 years working in specialty medicine including emergency and critical care, specialty surgery, and internal medicine.