John E. Burns, Owner & CPA

John carries with him a wealth of expertise regarding taxes, accounting, and business consulting. With over 30 years of experience in the financial world, he is passionate about helping his clients smooth any bumps on their road to success, as well as discovering how to prepare the most efficient tax returns possible. John enjoys working hard, and will make himself available to his clients any time, day or night.

Cell: 636-485-3217 Email:

Liboria Haerer, EA

Joining the Clemmer team in 1993, Liboria brought with her a vast understanding of the accounting world. Her proficiency with numbers and close client relationships have proven to be an integeral part in making Clemmer & Associates what it is today. Liboria’s attention to detail and commitment to accuracy also prove to be exactly why our clients feel secure depending on her.


Ashley White, Staff Accountant

A recent University of Missouri-St. Louis graduate, Ashley earned her Masters degree in Accounting with Magna Cum Laude honors. Her meticulous work and appreciation for solving puzzles makes her a perfect fit here at Clemmer. Ashley has an abundance of knowledge which will help carry her through her CPA exams in the fall!


Tina Mulherin, Payroll Coordinator

Delivering over 15 years of experience in the field, Tina provides guidance and know-how when it comes to payroll processing. Understanding the importance of handling payroll for small business’, she is dedicated to ensuring our clients never have to worry when it comes to compensating their employees correctly.


Sylvia McCormick Burns, Office & Relationship Manager

Sylvia, along with her husband Stanton, own Oakview Wealth Solutions, a financial planning and investment management firm located down the hall from Clemmer & Associates. While her experience and knowledge mostly lie within that field, Sylvia joined the Clemmer team to assist with office and relationship management. She has a knack for organization and a solid commitment to providing clients with a warm, friendly environment. And yes, she is John’s daughter-in-law!