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About Our Firm

Lifestyle Tax & Accounting LLC is a family-owned business proudly serving Mosinee and communities throughout Central Wisconsin. Founded by Robert Olszewski and built on trusted relationships, we provide dependable tax, accounting and payroll services with a personal approach you can count on. We are dedicated to helping individuals and businesses feel confident, supported and cared for every step of the way.

Meet The Team

Andrew Olszewski

Founder, Tax Professional, & Accountant

Andy has been part of Lifestyle Tax & Accounting since the very beginning, continuing the family business founded by his father, Robert Olszewski. He graduated from the University of Wisconsin- Stevens Point with a Bachelor's Degree in Accounting and Business Economics. He is dedicated to helping individuals and businesses navigate taxes and accounting with confidence. Outside of the office Andy enjoys hunting, fishing, golfing and spending time with his wife and two dogs.

Erich Schmitt

Partner & Accountant

Erich has been part of the Lifestyle Tax & Accounting team since 2008 and brings years of experience and dedication. He graduated from the University of Wisconsin- Stevens Point with a Bachelor's Degree in Business Administration. He takes pride in helping clients feel informed and supported year-round with all of their tax and accounting needs. Outside of the office, Erich enjoys golfing, fantasy sports, cheering on the Milwaukee Brewers and spending time with his family.

Brooke Simonis

Office Manager & Accountant

Born and raised in Mosinee, Brooke joined Lifestyle Tax & Accounting in 2020 after earning her Associate's Degree in Accounting from Northcentral Technical College. As Office Manager and Accountant, she enjoys helping clients and keeping things running smoothly around the office. In her free time, Brooke enjoys traveling, spending time with her dogs, whitewater rafting and throwing darts.

Sarah Olszewski

Administrative Assistant & Marketer

Sarah joined Lifestyle Tax & Accounting in 2026 as an Administrative Assistant & Marketer. She graduated from the University of Wisconsin- Whitewater with a Bachelor's Degree in Marketing and Management. She enjoys combining creativity with organization to help support both clients and the office team. In her free time, Sarah enjoys golfing, sewing, traveling, and spending time with friends and family.

Linda Simonis

Staff Assistant

Linda joined the Lifestyle team in 2021 after deciding retirement was a little too quiet for her. As a staff assistant, she enjoys helping around the office and bringing a friendly, welcoming presence to the team. Outside of work, Linda loves crafting holiday decorations, gardening, traveling and cheering on the Packers.

Corrine Soppe

Receptionist

After retiring in January of 2026, Corrine joined the Lifestyle team as a receptionist and quickly became a valued part of the team. She enjoys connecting with clients and helping create a positive experience from the moment they walk through the door. In her free time, Corrine enjoys golfing, traveling and spending time with her dogs and grandbaby.