Doctors and Staff

All professionals at Malinowski & Sefcik maintain the highest levels of accreditation and pursue ongoing education to stay abreast of the latest trends in the medical field. Read on to learn more about our staff's experience and training.

Get to Know Your Doctors

Dr. Jim and Dr. Dave met in dental school at Loyola and went into business together shortly after graduation.  Malinowski & Sefcik, D.D.S. originated in 1983 when they took over for Dr. Leland Lehigh upon his retirement.  Six years later they acquired the practice of Dr. Leslie Long and have been growing their patient base ever since.  They are both proud of the approachable, family-friendly environment they have cultivated and are excited at the prospect of continued growth for years to come.

Dr. Jim and Dr. Dave are grateful for you, their patients, and the trust you put in them.  They look forward to getting to know you and your families and providing you with the most informed, patient-oriented care.

James J. Malinowski, D.D.S.

Dr. Jim has been a lifelong resident of the Joliet area.  After receiving his bachelor’s degree in Biology from Southern Illinois University, he attended Loyola University School of Dentistry.  He graduated with his Doctor of Dental Surgery degree in 1983.  He is a member of the Will County Dental Society, Illinois Dental Society, and the American Dental Association.

Dr. Jim currently resides in Shorewood with his wife, Lorrie.  They make frequent visits to Chicago to spend time with their two daughters and son-in-law.  Dr. Jim is an active member of his church and the Knights of Columbus, on whose behalf he has led numerous community outreach and fundraising events for local causes.  He fills the remainder of his spare time fishing, reading, working on home renovation projects, doing yard work, and enjoying dinners with family.

Dr. Jim’s philosophy is “treat people as you would like to be treated.”  This has resulted in over 30 years spent building relationships with patients and seeing those relationships evolve into friendships as he cares for them and their families.  Dr. Jim is thoughtful and attentive with his patients, and works diligently to provide effective and pain-free dental care.  He enjoys all aspects of dentistry, particularly educating patients and working with them to come up with a treatment plan tailored specifically to their needs and comfort.

David J. Sefcik, D.D.S.

Dr. Dave was born and raised in Joliet and attended Joliet Catholic High School.  He graduated from Loyola University in Chicago with his bachelor’s degree in Biology.  He earned his Doctor of Dental Surgery degree from Loyola University in 1983.  He is a member of the Will County Dental Society, Illinois Dental Society, and the American Dental Association.

Dr. Dave and his wife, Linda, reside in Joliet with their three boys – Phil, Luke, and Ethan.  The family stays active participating in outdoor activities together including running and biking.  They also enjoy playing and watching sports.  In his spare time, Dr. Dave enjoys playing and collecting guitars.

Dr. Dave believes in creating a caring office atmosphere to make every patient feel welcome and at home.  After 33 years of practice, his strives to also call his patients his friends.  Dr. Dave is gentle and comforting with his patients and helps to calm any anxieties you may have about dental care.  You will experience this difference after your first appointment with Dr. Dave.

Our fantastic front desk personnel . Becky 10 years of service and Carla 27 years of service

Our Location

Office Hours


8:30 am-5:00 pm


8:30 am-5:00 pm




1:00 pm-7:00 pm


8:30 am-5:00 pm


8:30 am-12:00 pm