Our Staff

Office Manager

Linda has lived in Janesville all her life and graduated from Western Wisconsin Technical College in LaCrosse, Wisconsin in the Dental Assistant program in 1973. She was employed by Dr. Forrestal for many years and now by Drs. Karrels, Lyons and Wason since 1973. She is married to Michael and has four grown children. She enjoys gardening, quilting and spending time with her family and grandchildren. She also enjoys spending time up north at their cabin.


Debbie, our Scheduling Coordinator, is one of the first smiling faces to greet the patients at TriMark. Debbie was born and raised in Janesville. She graduated from Lakeland Medical & Dental Academy in 1976. Debbie is married to Bill, and they have two grown children, Ted and Katie. Debbie is also the proud grandma of three grandchildren who keep her very busy.



Karlene graduated from Blackhawk Technical College in 2001 and started at TriMark in 2005. Karlene was born and raised in Janesville. She is married and has two active boys. She enjoys running, time with friends and watching her boys play hockey.

Lora grew up in Southern Wisconsin and attended Madison Area Technical College. She graduated in 1984 with a degree in dental hygiene. She joined TriMark in 2004 when TriMark merged practices with Dr. David Foulkes’ office, for whom she had worked for the past 18 years. Lora enjoys Wisconsin Badger sports, cooking, riding horses and time spent with her family.

Elizabeth is originally from Janesville. She graduated from MATC in 1995 and has worked at TriMark since then. She is married and has three children. Aside from raising her kids, she enjoys traveling, reading and being outside.

Anna graduated from Madison Area Technical College in 1990 with a degree in dental hygiene. She grew up in Orfordville, is married and has two children. In her spare time, she loves to bike, take her dogs for runs, ride horses and spend time with her family.

Clinic Supervisor

Sherri graduated from BTC in 2001 and then joined TriMark Dental. She works chairside with Dr. Karrels and Dr. Popp and fills in wherever she is needed. Sherri was born and raised in Albany where she still resides today with her two beautiful daughters, Kierra and Kaydra. She is a Girl Scout leader and youth softball coach in Albany. In her spare time, she enjoys spending time with her friends and family along with gardening, scrapbooking and long walks. Sherri enjoys getting to know the patients on a personal level which makes dental assisting a little more fun. She is known as "that girl from Albany."



Shannon has been assisting with Dr. Wason since 2007. She loves talking with different people every day and hearing their stories. She enjoys cooking, exercise, listening to live music and spending time with her husband and two kids.

Kristal graduated from the Blackhawk Technical College Dental Assistant program in May 2016. She now works as chairside assistant for Dr. Popp, as well as lending a helping hand wherever is needed. Kristal's hobbies include painting, playing guitar, hiking and kayaking. She appreciates a good joke and enjoys sharing a laugh with the patients.

TriMark Dental Clinic

  • TriMark Dental Clinic - 2130 Kennedy Rd., Janesville, WI 53545 Phone: (608) 752-7452 Fax: (866) 254-4324

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