Heights Hospital For Animals

1865 Commerce St
Yorktown Heights, NY 10598



Our Team


Dr. Nancy Delaney 

Dr. Nancy Delaney was born in Northeastern Pennsylvania. After meeting Dr. Dave in High School, they both studied biology at Wilkes University then went on to veterinary school at the University of Tennessee. Together with Dr. Sebetic they graduated in 1988. After completing an internship at the Animal Medical Center in New York City, Nancy settled in the Hudson Valley with her husband Dr. Dave.

In 2003 the three doctors became partners at Heights Hospital for Animals in Yorktown Heights and Harlem Valley Animal Clinic in Dover Plains, New York.
Dr. Delaney was blessed to have a loving and supportive family who encouraged her to pursue a lifelong dream of becoming a veterinarian. She uses genuine compassion and empathy in helping both her patients and clients. Her special interests are internal medicine and dentistry.
Her favorite activity is hiking in the mountains with Dr. Dave and their beagle, Scout!


Dr. Dave Groblewski:

Dr. Dave Groblewski is a native of Northeastern Pennsylvania. He and Dr. Delaney met in high school and then both got their undergraduate degree in biology at Wilkes University. Although his father and uncles were renowned physicians in the community, Dr. Dave decided to pursue a career in veterinary medicine. He attended the University of Tennessee Veterinary school, and together with Drs. Delaney and Sebetic graduated in 1988. Dr. Dave worked at an emergency practice in Tennessee before moving to the New York area. In 2003 the three doctors became partners at Heights Hospital for Animals in Yorktown Heights, NY and Harlem Valley Animal Clinic in Dover Plains, NY.
Dr. Dave’s special interest is internal medicine where he relies on his experience and expertise in solving complex medical issues.
In his spare time he enjoys many outdoor activities including golf, fishing for steelhead trout at the Salmon River in upstate New York, and hiking with his wife and dog, Scout.


Dr. Mark Sebetic:

Dr. Mark Sebetic grew up on Long Island in NY. He started working at the Port Washington Animal Hospital when he was a junior in High school. He began as a volunteer and worked his way through the different jobs at an animal hospital. He attended undergraduate school at Muhlenberg College and graduated from The University of Florida with a degree in Microbiology and Cell Science. He went to Veterinary School at The University of Tennessee where he met Drs. Delaney and Groblewski. The 3 graduated in 1988.

After graduating he worked on Long Island for 6 years and in 1994 he bought Harlem Valley Animal Clinic. He remained in contact with Drs. Delaney and Groblewski and in 2003 they became partners and purchased Heights Hospital For Animals. In 2008 he opened Kent Animal Clinic. His special interests include surgery and dermatology. He remains deeply committed to a compassionate and common sense approach to his patients and clients.

Together with his wife Cathy and son Michael he lives in Kent, CT. They have 3 dogs, 2 Labradors and 1 King Charles Spaniel, and 3 cats. He serves as the treasurer of The Kent Memorial Library and is the vice chairman of the Kent Board of Finance. He is an avid golfer and plays regularly.


Lisa Hamilton

Lisa is a lifelong resident of Yorktown Heights. We have been fortunate to have Lisa at our practice for the majority of our time as owners. Her genuine love for animals is matched by her desire to help people. This empathy, and her keen business sense keeps our hospital running smoothly, and our patients and clients happy.
When away from the office, she enjoys hiking, yoga, reading and enjoying family time.


Rebecca Page 

Rebecca has been a valued employee at Heights Hospital for over eleven years. Her lifelong devotion to animals makes her an enthusiastic and compassionate member of our team.
Outside of work she keeps busy managing her farm and promoting her children’s love of animals.


Kathy Klein

Kathy is a long time resident of the Hudson Valley. She graduated from Delhi University with a degree in Veterinary Science Technology. She then became a Licensed Veterinary Technician. She has worked at a number of Veterinary Hospitals gaining a wide range of knowledge and expertise in the care and nursing of animals. Her relationship with Drs. Delaney and Groblewski has spanned over 20 years. She promotes the highest standard of care for her patients as she continues to educate herself.

She has a cat named Blackie and her interests away from work include horseback riding and kayaking.


Kimber Hadden

Kimber grew up in Poughkeepsie NY. She worked in a pet store caring for small and exotic animals for 4 ½ years prior to joining us at Harlem Valley Animal Clinic in 2011.

As well as assisting the doctors and technicians, she is one of the employees in charge of the kennel, thus she plays a vital role in the well-being of all our patients.
Her fur babies include rabbits, ferrets, hedgehogs, and a German Shepherd. She enjoys being outside playing with her animals and reading.