Say Hello to Our Veterinarians and Staff in Norridge

Our veterinarians and staff have built their lives around helping animals and giving people more time to cherish with their beloved pets. With their diverse backgrounds and unique skill sets, our team members are well-equipped to understand your pet's needs and ensure they're being met at the highest level. We're excited to get to know you and your companions and spend many more years working together to keep them healthy!


Dr. Katherine Wawronowicz: veterinarians in Norridge

Dr. Katherine Wawronowicz-Anderson, DVM, C.V.A. | Medical Director

Dr. Anderson obtained her DVM from St. George's University in 2005. She has been working as a general practitioner at Norwood Park Animal Hospital since graduation. In 2016, Dr. Anderson purchased the hospital from Dr. Hammer and changed the name of the practice to Companion Animal Hospital of Norridge.

Dr. Anderson has a special interest in Chinese medicine and obtained her acupuncture certification from the Chi Institute in 2009. She is passionate about providing high-quality medicine to her patients and being able to treat them using a combination of Eastern and Western medicine. On her days off, Dr. Anderson keeps busy with her husband Marty and their two children.

What made you decide to become a veterinarian?

I knew I wanted to be a veterinarian from the time I was very young.

What is your most memorable moment as a vet?

Helping a paralyzed dog walk again using acupuncture.

Why did you decide to join the Companion Animal Hospital team?

I worked at Norwood Park Animal Hospital for 10 years, and became a partner when it was purchased by Companion Animal Hospital.

What is the best thing about being a vet?

It's very rewarding to help sick animals. I also really enjoy getting to know my clients and seeing their children grow up.

What is the most common problem you’ve encountered in pets you treat?


What was the most rewarding case you have had as a veterinarian?

Titan, a Doberman Pinscher, was probably my most rewarding case. He came in unable to walk and had terrible ulcerations on his legs due to diabetes mellitus. Integrating both Eastern and Western medicine, I was able to get his diabetes under control, then his sores healed and he was able to walk again. He has since passed away but he will always have a special place in my heart.

Do you have any special interests in veterinary medicine?

Chinese medicine including acupuncture and herbal medicine.

What is the most unusual pet you have helped treat?

I volunteered at the Wildlife Clinic in vet school and helped treat raptors, like Great Horned Owls.

What are some of your favorite activities outside of work?

Hiking, camping, yoga or just laying on a beach.

Favorite place to eat?

The Gage

Favorite place to visit?

Italy, Switzerland, any warm place with a beach.

Favorite movie?

Best in Show

Favorite food?


What is your favorite sports team?

Chicago Bears

Name 3 things people might be surprised to learn about you.

  1. I hiked the Inca Trail to Macchu Picchu
  2. I backpacked through Europe with my best friend for 8 weeks after college
  3. I love music and going to concerts
Dr. Tomasz Krystek: veterinarians in Norridge

Dr. Tomasz Krystek, DVM

What is your educational and veterinary medicine background?

I studied veterinary medicine at the Warsaw University of Life Sciences and graduated in 2010. I then obtained my license to practice veterinary medicine in the state of Illinois in 2015.

Why did you decide to become a veterinarian?

I have always enjoyed learning about life sciences and have had compassion for animals; therefore the veterinary field was the best fit for me.

What are your special interests in veterinary medicine?

Internal medicine and diagnostic imaging.

What is the most unusual pet you have helped treat?

A donkey.

What is your biggest pet peeve?

Traffic jams and when people use unnecessary acronyms/abbreviations.

Favorite place to eat?

Home or Deli 4 You.

Favorite place to visit?


Favorite food?

Pork chops with red beets and potatoes, and tiramisu.

Favorite movie?

Ghost Dog: The Way of the Samurai

Favorite sports team?

Legia Warszawa, Liverpool F.C., and Valencia C.F.

Name some things people might be surprised to learn about you.

  1. I have two cats named Rasputin and Tango
  2. I wanted to be a fighter jet pilot when I was a kid
Dr. Pawel Tymoszuk: veterinarians in Norridge

Dr. Pawel Tymoszuk, DVM

My name is Pawel Tymoszuk. I was born in Warszawa, Poland. After moving to the US I have been serving the local community as a technician for seven years. Hard work and dedication resulted in obtaining my professional veterinary license in 2017. I am looking forward to helping you and your pets as a veterinarian now.

What is your educational and veterinary medicine background?

I graduated from Warsaw University of Life Sciences in veterinary medicine in 2009. My adventure with veterinary medicine in the US started at Norwood Park Animal Hospital with Dr. Hammer and his staff in 2010. This amazing journey continues with Companion Animal Hospital of Norridge now.

Why did you decide to become a veterinarian?

My passion for medicine and animals started in grammar school. The only way I could combine both interests was attending a vet school.

What are your special interests in veterinary medicine?

Wound care and surgery.

What is the most unusual pet you have helped treat?

A baby squirrel.

What is your biggest pet peeve?

People on their phone while driving.

Favorite place to eat?

Anywhere outdoors.

Favorite place to visit?

My beloved Warszawa, Wolka Zamkowa (my grandma's village) and Capri (in Italy).

Favorite food?

Healthy food.

Favorite movie?

The Grand Budapest Hotel.

Favorite sports team?

Legia Warszawa, F.C. Barcelona, the Polish ski jumping national team, and the Chicago Bulls.

Name some things people might be surprised to learn about you.

  1. I collect soccer team jerseys
  2. Woodworking is my biggest hobby
  3. I like reading Scandinavian crime stories
Dr. Megan Murray: veterinarians in Norridge

Dr. MEgan Murray, DVM

What is your educational and veterinary background?
I did my undergraduate studies at North Park University where I majored in Biology. I then went on to Veterinary School at the University of Illinois.

Why did you decide to become a veterinarian?

I have always loved animals and science, so when I started thinking about what I wanted to be when I was in high school, veterinary medicine seemed to combine the best of both worlds!

What are your special interests in the field of veterinary medicine?

I enjoy neurology, oncology and behavior medicine.

What is the most unusual pet you have helped treat?

I helped treat a porcupine and an alpaca in veterinary school!

What is your biggest pet peeve?


Favorite place to eat?

Uncle Julio’s for Mexican food

Favorite place to visit?


Favorite food?

Pizza and buffalo wings

Favorite movie?

Good Will Hunting and Tommy Boy

Favorite Sports Team?


Name 3 things people might be surprised to learn about you:

  1. I am allergic to cats and dogs.
  2. I don’t have any pets…yet.
  3. I love doing jigsaw puzzles in my free time!
Dr. Douglas Hammer: veterinarians in Norridge

Dr. Douglas Hammer, DVM, DACVS

Dr. Hammer graduated from the University of Minnesota in 1967. Since graduation, he has served as an employee, partner and Chief of Staff at Norwood Park Animal Hospital. In May 2016, he sold Norwood Park Animal Hospital to his associate Dr. Kathy Anderson, and remains on staff as our part-time surgeon and associate veterinarian in partial retirement. During his tenure, he has published extensively. In 1982, Dr. Hammer was accepted into the American College of Veterinary Surgeons as a soft-tissue and orthopedic surgeon. He has developed techniques for the repair of cleft palate, harelip and multiple orthopedic procedures.

Dr. Hammer is married and has an adult son, along with two dogs and four cats. When not practicing veterinary surgery and medicine he enjoys photography, fishing, skiing, shooting sports and building accurate models of 19th-century sailing vessels.

Support Team


Amanda, Hospital Manager

Hi! I am Amanda, the hospital manager at Companion Animal Hospital of Norridge. With a degree in Business Management I went on to earn my PHR in Human Resources, become a Certified Business Office Manager and a Certified Conflict Manager. Also being involved in animal rescue for several years - a voice for the voiceless - promoted to management through French Bulldog Rescue Network. All Brachycephalic (flat faced snort monster) breeds are my thing! I am the crazy frenchie lady spending my spare time as a servant to my two resident frenchies Beignet and Bowser while helping all others in need.

What a blessing it is to combine my education, experience and passion surrounded by such a talented and compassionate team!

"We can judge the heart of man by his treatment of animals." - Immanuel Kant

Alex: Veterinarians in Norridge

Alex, Lead Technician

Alex is responsible for the care and maintenance of all mechanical and technical tools in the hospital. He is an operative assistant and provides technical care for medical and surgical patients in and out of the hospital. He is recently married and lives with his wife, their dog Sammy, and four cats.

When he is not working, he enjoys watching the Cubs crush the Cardinals, growing hops and making beer.

Stacie: Veterinarians in Norridge

Stacie, Veterinary Technician

Stacie has been a vet tech for 14+ years and joined Companion Animal Hospital Norridge in September 2016. She is a certified elementary teacher as well, but really enjoys working with animals. She's a huge Cubs and Blackhawks fan and enjoys spending time with her husband and son. Stacie loves spending time with family and friends and loves being active outdoors. She really looks forward to meeting you and working with your pets.

Heidi: Veterinarians in Norridge

Heidi, Certified Veterinary Technician

Since she was young, Heidi always knew she wanted to work with animals. This led to her earning a Bachelor's degree in Biology and a minor in Chemistry. She recently graduated from the veterinary technician program at Fox College in Tinley Park. She loves working in general practice, but she hopes to one day work with elephants, which happen to be her favorite animal! When Heidi isn't working, she's cheering on the Cubbies or making cupcakes with her sister for their cupcake business.

Gosia: Veterinarians in Norridge

Gosia, Certified Veterinary Technician

Gosia is originally from Poland and has loved animals all her life. Her grandfather was a rural veterinarian back in Poland, and she would assist him with various kinds of animals. This first sparked her love for the veterinarian field. Gosia has a degree in Biology and received her veterinary technician training at Bel Rea Institute of Animal Technology in Denver, Colorado and has been certified since 2008. She has unique experience in working at places such as Brookfiled Zoo and Willowbrook Wildlife Center. Outside of work, Gosia spends her time with her dog Gucio and cat Sheffie. She loves to read, bike, hike and travel.

Kayla: Veterinarians in Norridge

Kayla, Veterinary Technician

In 2013, Kayla started her veterinary technician program at the Tinley Park Vet Tech Institute. Unfortunately, circumstances left her unable to complete the program. After school, she began working at a grooming salon, learning how to properly bathe and dry dogs and cats. Afterward, she went to Lombard Veterinary Hospital where she worked as a receptionist and kennel attendant. Near the end of her time at Lombard, Kayla moved into a tech position. She also had the opportunity to work in the ER at Midwest Bird and Exotic Hospital. There, she was able to work with all kinds of exotic animals including snakes, hedgehogs, and even pigs and ducks. As much as she enjoyed the adrenaline rush of the ER, it became emotionally taxing and she found herself wanting to work in a regular practice.

Kayla appreciates Companion Animal Hospital's welcoming team and their commitment to making clients happy and providing the best medicine for their patients. She also loves that her team members are very helpful and never hesitate to answer questions or help with certain tasks. One of her most memorable experiences at Companion was getting to perform her first dental procedure. Since leaving school, it was a skill she was most interested in learning.

Sarah: veterinarians in Norridge

Sarah, Veterinary Technician

Animals make more sense to Sarah than humans do. Their language is compassion, and that makes them that much more amazing. Sarah loves working at a general practice and is hoping to gain some E.R. experience in the future. She would also eventually love to do physical therapy for dogs and horses! While she has not yet gone to school to be a CVT, Sarah plans to do so in the not-so-distant future. She was lucky to be given the chance to learn from some pretty amazing techs and doctors here at Companion Animal Hospital in Norridge! In her spare time, Sarah likes to ride horses, hang out with her Pitbull, Datson and cat, Turbo, and play video games.

Katie: Veterinarians in Norridge

Katie, Veterinary Technician

Katie has a bachelor's degree in Zoology and Anthropology from Southern Illinois University Carbondale. She has worked with a variety of animals, from rats to companion animals to monkeys in several different settings including research, animal clinics and field studies overseas. She's also a certified crazy cat lady, or some would say anyway, and currently has 4 of her own. Katie would love to go to graduate school to study animal and environmental conservation, and will hopefully have that opportunity someday.

Her favorite part of working at Companion is the relationships the staff have with clients and their pets. They have so many long-time clients, and Katie enjoys getting to know them and their pets, to know their stories and form lasting bonds.

Katie has had many memorable moments with her fellow staff and their clients and patients, but the Open House was a highlight. She enjoyed helping the team prepare for the event and being a participant, as well has getting to show clients just how much we care about them and their pets.

Karen: Veterinarians in Norridge

Karen, Lead Receptionist

Karen joined the Companion Animal Hospital Norridge team in June of 2016. She attended an all-girls high school on the Northwest side before her foray into the wonderful world of customer service, where she has since gained over 25 years of experience. She spent the last 17 years working as a chairside assistant in the dental field while raising her two (now adult) children. Karen enjoys bringing positivity to Companion Animal Hospital. She always does her best to provide excellent service and genuinely enjoys helping others. “Every day at Companion Animal Hospital is different, you get to see old friends and make new ones as well!” In her free time, Karen enjoys watching bad reality TV, feeding literally anything that wanders into her yard, and hanging out with her husband and their “big boned” dog Maggie, and two fairly odd cats named Spooky (aka Lolly) and Wham! (aka Baloney Cat).

Chris: Veterinarians in Norridge

Chris, Receptionist

Chris has been in the animal medicine field for almost 40 years. She began working as a veterinary technician, which led to her transition to office manager. In 2016, she joined the Norwood Park Animal Hospital team. Chris loves the day-to-day aspect of working at an animal hospital and jumping in to help wherever she is needed. She currently has two dogs at home; a Golden Retriever named Charlie and a Chihuahua named Lady. She also has a cat named Wyatt. Chris enjoys spending time with her husband, their two daughters, and friends.

Stephanie: Veterinarians in Norridge

Stephanie, Receptionist

Stephanie has worked with Companion Animal Hospital for 11 years. She enjoys being the positive presence that pets and pet parents meet as soon as they walk in,  and has a wonderful time working with all of her coworkers! Stephanie knows that her position is central to our clients having a positive experience at the hospital, so she does her best to help everyone who walks through the door (both humans and pets).

In her free time, Stephanie enjoys spending time with her husband and playing with their two adorable kids! She also enjoys taking care of her two cats and dog, and baking delicious treats!

Michelle: Veterinarians in Norridge

Michelle, Receptionist

Hi I'm Michelle! I have been with Companion Animal Hospital for 8 years as a receptionist, which means I'm the one answering phones and making appointments when you call!  I have 4 small dogs of my own that are the love of my life and helped me decide to work in the veterinary field.

One of the most rewarding parts of my job is talking to all of our clients and helping both our human clients and furry clients feel comfortable and right at home!

Kelsey: Veterinarians in Norridge

Kelsey, Receptionist

Kelsey has worked with Companion for a handful of years now and absolutely loves it! Her favorite part of the job is interacting with the clients and helping them with their questions whenever needed. She also has four dogs of her own and tends to their needs on the daily. She is a true animal lover as they always make her smile on a rainy day!

Along with working at the Animal Hospital she has a few other jobs. She is a Professional Chicago Actor, Teaching Artist (Dance/Art/Theatre), and a Company Member of Party Like a Princess. She loves that her skills have a variety of expertise allowing her to execute her job at Companion. She considers Companion Animal Hospital of Norridge a loving atmosphere that continuously helps the health of animals. She is very proud to be apart of the team!

Verena: Veterinarians in Norridge

Verena, Receptionist

Verena has been working in the veterinary field for 7 years. She has a Culinary Arts degree but decided she liked working around cats and dogs more and followed her passion to Companion Animal Hospital of Norridge!

When she is not binging on Netflix shows or finding ways to veganize her favorite recipes, she is hanging out with her husband, son and chihuahua named Charlie.

Lauren: Veterinarians in Norridge

Lauren, Receptionist

Having always loved all living things--animals, people, and plants alike--working with animals (combined with Lauren's customer service experience) just made sense. Making another person's day ultimately makes her day, and being able to go above and beyond for clients and their furry loved ones fills her with a sense of accomplishment. In her opinion, a rewarding job is the best job! When Lauren's not working, she enjoys tending to her jungle at home--there are plants everywhere! She also has three tiny black 'panthers' along with rabbits, lizards, birds and rats keeping her busy--ask her about them! Lauren is a spunky vegan who enjoys cooking and expanding her skills in watercolor and illustration, which she majored in in college.

Gina: Veterinarians in Norridge

Gina, Receptionist

Hi I'm Gina! I have worked in customer service for over 10 years. Working with animals and their families is a passion and is really very rewarding for me. This led me to join the Companion family and after a few months, I already feel right at home!

Outside of work, I'm a busy mother of 3 amazing children, 2 sassy & spunky dogs and a very opinionated bearded dragon. I look forward to meeting you and your furry companions!

Katherine: Veterinarians in Norridge

Katherine, Lead Kennel

My passion is working with animals, ever since I was little I can remember wanting to pet every dog or cat I saw. I have a beagle who's name is Buddy and because of him I became interested about training and learning about dog behavior. I have been working and training with dogs since 2013. My passion has always been trying to help dogs in any way, so I decided to pursue a career in positive dog training.

By the year 2016 I completed my training program and was able to teach dogs Basic obedience and work on Behavior Modification. I plan to get my certification and continue to positively train dogs. I look forward to watching your furry companions at our doggy daycare!

Monica: Veterinarians in Norridge

Monica, Kennel

Hi I'm Monica! I just recently graduated from Triton College with a degree in Business Management. I have been in the animal field for the last ten years and have loved every minute of it. Animals have been my passion since I was a child, so I am excited to continue to grow within the Companion family.

I hope to open my own animal rescue in the future and make sure that all animals have a voice. I currently have one hamster at home, her name is Peaches and I love coming home to her after a day at work!

Jennifer: Veterinarians in Norridge

Jennifer, Kennel

Animals have always been a passion of mine since I was a little kid. I've been working with animals since 2004 by dog walking and pet sitting. I also have experience with doggie daycare and boarding since 2015. I have a degree in Early Childhood Education and was a full-time teacher for 12 years (I still work with kids part-time). Working with kids has helped me develop amazing patience, compassion and kindness. Which I also use on all the furry friends that come in and out of the hospital. Companion has had a special place in my heart since 1999, when my family first brought our dogs to the hospital. I am very honored to be working along side such amazing and loving people. In the future, I would love to pursue a degree in biology and be able to get my dream job as a zoologist, before I get too old! When I am not working I enjoy photography, drawing, exploring nature, going to concerts and spending time with my pups Melody and Penny.

Joyce: Veterinarians in Norridge

Joyce, Kennel

Hi, my name is Joyce! I have been with Companion Animal Hospital for a few years and enjoy spending time with everyone's furry companions!

When I'm not working I'm at home with my husband, mother and my own fur babys. In my spare time, I enjoy gardening and I recently have gotten into 5D Diamond Painting - it's very relaxing and highly recommended! I also enjoy spending time with my grandchildren.

Marisa: Veterinarians in Norridge

Marisa, Kennel

Hi! I'm Marisa. I am new to the Companion Animal Hospital team. I joined Companion in mid April and I am so happy to be aboard!
A little about myself, I grew up in Mount Prospect Illinois and I had a Schnauzer Poodle mix growing up - I attended Harper College in Palatine Illinois to pursue a degree as a Dietitian, but soon realized that animals was my passion. After being in the animal hospital/ daycare field for one full year and a half as a kennel assistant and 3 and a half years of animal care all together, made me realize that becoming a Veterinary assistant was right.

My passion for helping animals has grown over the years I have been a kennel assistant, which made my decision to become a Veterinary Assistant  much easier. I have also given thought to opening up my own rescue  to give all animals a voice and a second chance to find their forever home!

Joleen: Veterinarians in Norridge

Joleen, Groomer

After raising show dogs for 25 years and developing a passion for grooming, working in this field was a no-brainer! Not only is Joleen an experienced professional groomer; she also has experience in veterinary assistance, dog walking, boarding, doggie daycare and in-home pet care. Having cared for her own Bull Terriers and seeing many dermatological specialists to treat their various skin disorders, Joleen knows many approaches to canine skin and coat health. When she's not working, she enjoys hanging out with her two female Bull Terriers: Phaedra, who she personally handled to achieve her AKC Championship and Canine Good Citizenship, and Jodee, who has had lifelong dermatology concerns and who Joleen is currently helping through senior dog issues. She looks forward to meeting and grooming your furry companions!