Our Veterinarians

Dr. Annjolyn Pecoraro-Knoll
Owner, Veterinarian/Fear Free Certified Professional
Animals made a lasting impression in Dr. Annjolyn Pecoraro-Knoll’s life very early on—she can’t remember a time when she didn’t want to improve the lives of the earth’s creatures in whatever way she possibly could. Dr. Knoll has been a part of the veterinary profession since she was only 15 years old! She’s proud to now serve as the owner and operator of Knoll Animal Hospital.

A native of Lombard, Illinois, Dr. Knoll earned her Bachelor’s degree from Elmhurst College and studied veterinary medicine at St. George’s University in Grenada to obtain her Doctorate. She completed her clinical rotations at the University of Illinois at Urbana-Champaign. Dr. Knoll has special interests in dentistry, cardiology, dermatology, and exotic-pet care, and she remains an active member of the Illinois State Veterinary Medical Association and the American Veterinary Medical Association. She purchased Knoll Animal Hospital in March of 2015, and has been helping the pets and animal parents of the area ever since!

Away from the office, Dr. Knoll enjoys staying active in the community, traveling, and spending quality time with her nieces and nephew. She and her husband, Ryan, share their home with four furry companions: Howard the Shih Tzu mix; a Beagle mix named Ember; and two loveable cats named Sheldon and Bernadette.
Dr. Angela Clark
Associate Veterinarian/Fear Free Certified Professional
Dr. Angela Clark grew up in Lisle, where animal care was a part of her earliest memories. For her, another career path simply wasn’t an option! Dr. Clark has been bettering the lives of pets across Illinois for more than 17 years, and is thrilled to continue her journey as a member of the Knoll Animal Hospital family.

Dr. Clark earned her Doctoral degree from the University of Illinois at Urbana-Champaign. She joined the Knoll Animal Hospital team as an Associate Veterinarian in August of 2017, and brings with her particular interests in the fields of dentistry, feline medicine, and internal medicine.

When she’s not tending to pets’ needs here at the clinic, Dr. Clark loves watching football, fishing, reading, and drawing. She resides in Westmont with her husband, Colin, their son, Owen, and a variety of pets ranging from dogs and cats to birds and guinea pigs.
Dr. Alex Duran
Associate Veterinarian
Dr. Alex A. Duran is a native to our beautiful city of Chicago. He grew up in the Ravenswood neighborhood and regularly frequented our city's parks, museums, and zoos. Dr. Duran attended Chicago Public Schools and graduated from Lane Technical High School. He continued his education at the University of Illinois at Urbana-Champaign where he received both his Bachelor of Science in Animal Sciences and his Doctorate of Veterinary Medicine.

Prior to his career in veterinary medicine, Dr. Duran spent time working and volunteering at the Lincoln Park Zoo and at his local veterinary hospitals. These experiences allowed him to develop his passion of helping to keep pets healthy. Dr. Duran traveled to the Caribbean island of Grenada, West Indies where he spent approximately two years of his initial veterinary studies at St. George's University. He has now been working as a veterinarian for several years within the Chicagoland community.

Dr. Duran is a member of the American Veterinary Medical Association, Chicago Veterinary Medical Association, and the Illinois State Veterinary Medical Association. Dr. Duran is fluent in Spanish and enjoys being capable of building a bridge for his non-English speaking clientele.

When not at work helping our beloved patients, Dr. Duran enjoys spending time with his family, gardening, traveling, and is an avid fan of video gaming.