101 Merrill Ave North Sioux City, SD 57049

Opening Hours : M-Th: 8am to 5pm | F: 8am to 12pm
  Contact : 605-232-8802

NSDC Staff

Dr. Don Cork


Dr. Don Cork graduated from Baylor University and the University of Texas Health Science Center in San Antonio, TX. He served in the US Navy as a dental officer for three years before transferring to the Indian Health Service. He worked on the Winnebago Indian Reservation for 5 years before opening the North Sioux Dental Clinic in 1996. Dr. Cork has completed over 1,700 hours of advanced continuing education covering all facets of restorative dentistry. He enjoys providing comprehensive care to patients of all ages and holds a special interest in providing care to pediatric and special needs patients in a hospital setting. His interests outside the clinic include playing basketball, biking, and photography. He and his wife, Sheri, have three incredible grown children and one wonderful daughter-in-law. The Cork’s are very active in their church and have enjoyed living in Siouxland since 1991.

Dr. Ryan McKenna


Dr. Ryan McKenna is a native of Sioux City, graduating from East High School. He attended the University of Iowa for undergrad and the University of Iowa College of Dentistry. He has extensive experience in cosmetic, pediatric and oral surgery. Dr. McKenna is a member of the American Dental Association and the Sioux City Dental Society. Dr. McKenna enjoys spending time with his three children, who keep him busy in many sporting and school activities. He also enjoys biking, running road races and working out. The McKenna family embraces being part of the Siouxland Community and what it has to offer.



Reception Team Leader

Amy joined our team in January of 2013. She enjoys spending time with her family and friends. Occasionally, you can find her and her husband driving around in their 1967 convertible Camaro!



Blanca is a Registered Dental Assistant. She enjoys spending time outdoors with her husband, Heberto and son, Benjamin. She also enjoys visiting her parents and is an active member of her church.


Emily is a registered Dental Hygienist in Iowa, Nebraska, and South Dakota. She graduated from the University of South Dakota School of Dental Hygiene in Vermillion, SD. Spending time with her husband, family, and friends are what brings her the greatest joy. Emily is a Siouxland native that makes everyone smile.



Karleen has been with the North Sioux Dental Clinic since 2007.



Katie is a Registered Dental Hygienist and a 2005 graduate of the University of South Dakota. Katie enjoys spending time with her 3 wonderful children Owen, Jack and Olivia and her husband, Paddy. Katie is a native of Elk Point and Jefferson.



Kerri has been working at the North Sioux Dental Clinic since 2004. She is a registered dental hygienist and licensed in both South Dakota and Iowa. Kerri is originally from Minnesota and enjoys visiting her seven siblings there. She also enjoys the teaching aspect of Dental Hygiene and works part-time at the University of South Dakota. Kerri loves to spend her spare time camping with her family & watching her kids in dance and sports.



Mallory has been a team member since 2013. She completed her certifications in 2007. She had a great experience working in a dental clinic in Haiti with Dr. Cork. If Mallory isn’t in the office, she is often found at the Siouxland Surgery Center helping with hospital dentistry.


Shannon was born in Hessen, Germany, and spent her childhood traveling as a dependent with the USAF. She is a graduate of the University of South Dakota with a Bachelor's of Science in Dental Hygiene. In her free time, she likes to garden and enjoy other outdoor activities with her husband, Matt and new daughter, Malloreigh. She also has the joy of keeping her golden retriever, Griffin, from destroying her home. Shannon began her dental assistant career in Omaha, NE and is now a full-time hygienist. She looks forward to getting to know each patient and helping maintain their dental health.


Business Team Leader

Sue is a receptionist and insurance specialist. She has been working at the North Sioux Dental Clinic since 1998. Sue loves gardening, camping with her family, and spending time with her grandchildren. She has three children: Holly, Morgan, and Jacob.



Val has been working at the North Sioux Dental Clinic since 2006, but has over thirty years prior experience of general dentistry and oral surgery combined.