Brett Mathieson, CPA

Brett Mathieson, CPA


Brett Mathieson is a partner at Mathieson, Moyski, Austin & Co., LLP with more than fifteen years of public accounting experience. He has a wide range of familiarity with individual and corporate taxation. Brett works with clients across many industries with specializations in real estate, construction and professional services. Brett prides himself on being an extension of his clients team, working closely with them to accomplish their goals. A partnership with a client goes far beyond preparing a tax return or financial statement. Being a small business owner himself, Brett knows the many hats a small business owner has to wear and helps his clients work through the big decisions they have to make.

Brett spends most of his free time with his wife and three children. He enjoys coaching any sports they are involved in and going on family outings, whether it is ice skating and skiing in the winter or golfing and swimming in the summer.


Indiana University

Bachelor’s Degree in Accounting, Finance, & International Studies


Member of the American Institute of Certified Public Accountants (AICPA)

Member of Illinois Certified Public Accountants Society (ICPAS)

Wheaton Chamber of Commerce Ambassador

President of the Wheaton Police Pension Fund Board

Treasurer of the Student Excellence Foundation for Wheaton-Warrenville District 200