595 Chestnut Ridge Road
Woodcliff Lake, NJ 07677
[201] 391-5537


Linda Siano:
Linda has 30 years of Orthodontic experience. She’s been with Wittlinger Orthodontics since April 2006. Linda attended Bergen Tech School, learning Dental Assisting and attended Fairleigh Dickinson Dental Clinic until graduation. After graduation her first job was in an Orthodontic office and she was immediately hooked. Linda and her husband have been married for 36 years and have 3 grown children and 2 grandchildren. Linda loves to read books on the supernatural and enjoys spending her free time with her grandchildren playing games, reading to them, coloring or going shopping.

Sheila Knopp:
Sheila lives in Woodcliff Lake and has been with Wittlinger Orthodontics since February 2008. She loves watching the patients grow up, and values the relationships she has established with them and their parents. Sheila earned a BBA in Marketing from Baruch College in New York CIty. Her favorite things to do when she is not at work are: yoga ,taking long walks with her dog Champ, reading, traveling and spending time with her family and friends.

Doris Ponce:
Doris has been with Wittlinger Orthodontics since May 2012. Doris loves interacting with all the patients and helping them begin their journey to a beautiful new smile. She has had the opportunity to see the practice grow and how it has changed the lives of numerous patients by providing them with a beautiful smile. As the Financial Coordinator, she specializes in patient accounts. Her favorite pastime is watching her son play soccer.

Amy Wexler:
Amy is happy to be a part of the Wittlinger Orthodontics team for more than 8 years. Her 4 children have appreciated the quality of orthodontics offered in this practice, as well as her own Invisalign treatment. Amy earned a BA degree from Monmouth College with a major in Speech, Communication and Theatre and a minor in Psychology. When not in the office, she may be found reading, gardening, doing crafts, community theatre and enjoying time with her husband and children.