About A&O Certified Public Accountants.

We share an honest dedication to the dreams and details that matter to you. Because when it comes down to it, it’s people who matter most.

About A&O CPAs

Proudly serving Wisconsin & Illinois for over 40 years.

What do see when you look at a peacock?

When we see a peacock, we see strength, stability, and confidence – a strong foundation for support, stability to hold those beautiful feathers up, and confidence to show it all off. When we see a peacock, we think of A&O! 

In our 40+ years, we’ve build a strong foundation with a team of attentive advocates who serve government and not-for-profit clients throughout Wisconsin and Illinois. From the beginning, we’ve placed the greatest value on balancing our team members, relationships and quality of service. 

About A&O CPA Team Photo
Happy Clients
Kenosha Wisconsin Photos A&O CPA

Kenosha images provided by Visit Kenosha

Kenosha Wisconsin

Committed to your success.

We share an honest dedication to the details that matter to you and the people you serve. Because when it comes down to it, it’s people who matter most. No one can know everything. That’s why we choose to specialize in government and not-for-profit audit and fiscal support—so we can stay on top of the financial details that matter most to you.

Today, we are an extremely capable team of more than 30 employees. Technology has created new and easier ways to collaborate across geographies. It also has brought an increased level of complexity to many organizations. You can count on us to enable your success in a rapidly changing world by allowing your team to focus on what you do best, and engaging our team to do the same.

That’s what makes us different. That’s what makes us peacocks.


Do what you do best. We'll handle the rest.

When you choose A&O CPAs as your accounting partner you’re not only choosing a firm to help you meet your compliance and reporting responsibilities. You’re choosing a team of people who will help you navigate a constantly changing financial landscape and meet your future goals.

See what makes us different. Contact us for an introductory meeting.

A&O Certified Public Accountants

A&O is relationship centered, boutique accounting firm providing attentive, continuous accounting services to government and not-for-profit entities.


10411 Corporate Dr. Suite 104
Pleasant Prairie, WI 53158

©2023 Andrea & Orendorff LLP