Our Staff

Introducing the people who make APC the finest dental consulting firm in North America

Our consultants are uniquely qualified, carefully selected and rigorously trained

Unlike many dental consulting firms, our minimum requirements for analysts and consultants are a bachelor’s degree, multiple years of dental office experience and a demonstrated commitment to patient health. APC analysts and consultants have mastered a rigorous training program, and as their knowledge and experience increase, they are gradually trained in additional specialties and more complex situations.

Our staff consists of employees, not independent contractors. This ensures that no matter where you are located in the United States or Canada, you will receive the highest quality APC experience.

Michael and Stephanie
Michael and Stephanie

Michael and Stephanie Peterson


Michael and Stephanie are from Minnesota and have 3 children ranging from 4 years to 14 years. They love spending their free time outdoors and attending their children’s many activities.  They strive to preserve the integrity, quality and ideals on which APC was founded.  They love helping others improve their quality of health and seeing the doctor’s passion for dentistry come alive and the care they provide for their patients.   Michael and Stephanie, together, bring to APC 40 years of expertise in the health care, consulting and management fields.  They continue to provide ongoing training for their staff, conferring with the founders, Bob and Marci to continue with the expertise and quality of service that APC represents.

Michael Peterson


Michael has his Bachelor’s degree from Marquette University and his Master’s degree from Iowa State University in Engineering.  He has over 20 years of experience in consulting, marketing and management.  Prior to APC, Michael worked with Black & Veatch as an Engineer and the Zachry Group as Engineering Manager and Business Development Manager.  Becoming co-owner and the new President of APC fulfills his lifelong vision of following in his father’s footsteps by managing his own business.  Opportunities to enhance the quality of the doctors’ practices with insight and expertise in management, along with improving patients’ health, couple perfectly with Stephanie’s expertise.

Stephanie Peterson


Stephanie graduated with a Bachelor’s of Science degree in Nursing from the University of Kansas Medical Center.  She has practiced in the healthcare field for over 20 years and has been a Nursing Supervisor and Manager at hospitals and clinics across the Twin Cities.  She is passionate about health care and the opportunity with APC being able to help doctors provide the best dental health choices and excellent care for their patients.  Becoming co-owner and the new Vice-President of APC, along with her insight and expertise in healthcare, provides her a new avenue to promote and enhance the quality of patients’ health.

Bob and Marci
Bob and Marci

Bob and Marci Proebstle


Bob and Marci continue to be intimately involved in the business. Speaking with a doctor about a Practice Analysis, providing ongoing training for the APC staff, working with clients on building designs, associate and transition issues, advising with APC analysts during a Practice Analysis, and assisting with client issues with APC consultants and/or clients when necessary are part of the ways that they continue to support APC.

Bob Proebstle

Bob holds a Bachelor’s degree in business, with a major in finance from the University of Minnesota.  Bob worked for the world’s first and largest dental consulting firm for seven years prior to co-founding APC. While president of APC, he also served as the Executive Director of the National Society of Practice Management Consultants for eight years.

Marci Proebstle

Marci graduated from Thomas More College with a Bachelor’s degree in mathematics.  She worked as a programmer/systems analyst in the actuarial department of a large insurance company.  Before co-founding APC, Marci began her dental consulting career with the world’s first and largest international dental consulting firm, traveling forty eight weeks each year consulting dentists throughout the US and Canada.


Our Staff

Sue L. <h4>Practice Analyst & Client Services Director</h4>
Sue L.

Practice Analyst & Client Services Director

Sue is invited by dentists throughout the US and Canada to analyze their practices, identify areas of opportunity and develop an individualized plan of action to address their needs.  Sue has over 35 years of experience as a practice analyst and client support specialist.  She is extremely committed to her clients, coaching them through the innumerable issues facing dentists in today’s market.  Her passion was sparked early in her career as she realized how critical the management side of the practice is in leading doctors and their teams to reach their true potential.  Sue holds a bachelor’s degree in education and believes that learning never ends.

Tonya R. <h4>Practice Analyst </h4>
Tonya R.

Practice Analyst

Tonya received her Bachelor Of Dental Hygiene from Baylor College of Dentistry and her Master of Interdisciplinary Study from The University of Texas, Dallas.  Tonya’s experience includes public health dental hygiene, clinical dental hygiene, and dental hygiene education as an Associate Professor at Baylor College of Dentistry.  In addition, she has deep experience in sales and customer service leadership in dental, optical, and medical corporations.  Tonya has utilized her strong business development, business management and leadership skills to support dental and medical professionals as they create sustainable practices in which patients are provided with best-in-class care.

Louann G.<h4>Clinical and Business Consultant</h4>
Louann G.

Clinical and Business Consultant

As a clinical dental hygienist for nearly two decades, Louann believes strongly in inter-professional oral healthcare and understanding each patient as an individual. Louann graduated from the University of Minnesota with a bachelor’s degree in dental hygiene and has a master’s in public and nonprofit administration.  Louann comes with solid experiences in clinical hygiene, leadership development, mentoring, financial management leadership, and strategic planning.  Her experience with expanded care models, clinical hygiene and inter-professional education enable her to bring relevant perspective to the entire dental team.

Mary S.<h4>Business Consultant</h4>
Mary S.

Business Consultant

Mary delivers business consultations to APC clients throughout North America. Before joining APC, Mary had many years of experience working for a large, multi-location dental group practice.   Her roles included managing clinical systems and data analysis, and later a regional manager for multiple locations.  Mary holds a bachelor’s degree in education.


Karen A.<h4>Business Consultant</h4>
Karen A.

Business Consultant

Karen is a business consultant to dental clients in North America.  Her expertise includes business systems analysis, in-depth staff training and strategies for long term growth.  Karen has been associated with APC for over 35 years as a consultant and taking the lead on many projects.  She also worked in a large dental practice as the Business Manager implementing business solutions and developing team members. Karen has her degree in Business Administration.

Mary Anne S.<h4>Clinical and Business Consultant</h4>
Mary Anne S.

Clinical and Business Consultant

Mary Anne is a dental hygienist, holds a Master’s degree and is a former professor at Baylor University.  She is also a past president of the Texas Dental Hygiene Association.  Mary Anne resides in Texas and travels North America delivering both clinical and business consultations to APC clients.



Michele W.<h4>Administrative Assistant</h4>
Michele W.

Administrative Assistant

Michele ensures the highest quality in the preparation of materials and information sent to our doctor’s offices.  She is responsible for coordinating communications with the doctors, prospective clients and our team.  She will probably be the first person you speak with when you call APC.   She comes from a diversified work history with major corporations in transportation and insurance.

Susan T.<h4>Administrative Assistant</h4>
Susan T.

Administrative Assistant

Susan administers contracts, finalizes client schedules, takes care of the travel arrangements for our APC staff, making sure we are always in the right city. She does our bookkeeping and a variety of other tasks.  Susan brings to APC many years of expertise from working with national and international corporations in accounting, credit & collection management, and client services.

Accelerated Practice Concepts