Giersch Milwaukee Bookkeeping for Business
A Tradition of Excellence.

Get to Know Your Milwaukee Bookkeeping & Accounting Firm


Milwaukee small business bookkeeping firm professionals

Our professionals have the experience and the heart to help you reach your goals.

Professionals with a Passion for Small Enterprise

Every person who works at the Giersch Group has a passion for small enterprise, and many of us come from families of entrepreneurs and/or family businesses. We take pride in providing affordable professional services for Milwaukee area business owners and nonprofit managers. 

While there is a place in this world for institutions and corporations, it is the small business owner or non-profit volunteer who is our hero. It is our pleasure to support the free market and the entrepreneurial spirit by using the best corporate and institutional practices adapted for the small enterprise.

Effective planning starts with knowing the numbers and making decisions based on them. Our bookkeeping, virtual CFO and board services are how we do this, and are at the heart of what we do. Basic human resources tools, accounting software setup, marketing & sales support, grant writing and fundraising are other specialties we offer our clients.

Our bookkeepingconsulting and nonprofit services define the relationships we have with our clients. Mutual trust and respect sustain them.

Book a free consultation today and discover the best value in Milwaukee bookkeeping.

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How The Giersch Group Started

The story of the Giersch Group goes back to 2004 when Peter Giersch started Cathedral Consulting Group in his basement in a small suburb north of Milwaukee, WI.

As Peter was the only employee at the time people often asked, “Where’s the ‘group’?” Peter would reply, “Well, I have 5 kids!” Little did he know that the first of those five would be joining the firm 12 years later. Another early member of the group was Tom Grieve, who was Cathedral Consulting Group’s first employee as a college intern. He is now a Partner and Director of The Giersch Group.

Over the next decade, Cathedral Consulting Group grew into a multimillion-dollar, multi-national firm under the leadership of Peter’s then-partner and CEO of Cathedral Consulting, Phil Clements. After Clements’ passing in 2015, Peter withdrew from the firm he co-founded and started the Giersch Group to carry on the tradition of excellence in consulting for small businesses and grassroots nonprofits. The Giersch Group now has a second location in Brookfield allowing us to serve the small enterprise throughout the greater Milwaukee metropolitan area.


Peter Giersch Managing Director

Milwaukee business consultant Peter Giersch

The Giersches have a history of operating family businesses in the Milwaukee area. Paul and Gladys Giersch owned and operated Quaker Dry Cleaning on 3rd Street and Locust Street in the 1950s; Peter's maternal grandfather owned and operated Van Der Linden Plumbing on 27th & Atkinson and did the plumbing for County Stadium and Concordia University when they were being constructed. In keeping with tradition, the Giersch Group is a family company with a passion for supporting entrepreneurs.

Peter has degrees from UWM and Marquette and has been on the board of the Milwaukee Symphony Orchestra, the University Club of Milwaukee and the Archdiocesan Advisory Council, among others. Peter has earned the Certified Small Enterprise Advisor certification and also the financial advisor 6 & 63 certifications. He was recognized as a 40 Under Forty winner by the Milwaukee Business Journal in 2003. He and his wife, Carole, have five children.

 Email:     Call: 414-915-5800

Diane Govern Client Controller

Milwaukee client controller Diane Govern

Diane is Client Controller in charge of Reporting. In this role, Diane is responsible for the monthly reporting for our clients.  Like all Client Controllers, Diane oversees the work of the Associates and facilitates the communication with clients.  Diane studied theater at the College of St. Benedict and has worked professionally in both the arts and the business sector. She began her career as a bookkeeper in 2003 and shortly thereafter began working as a bookkeeping consultant, specializing in training and the execution of legal billing software. 

Diane enjoys serving on the Alumnae Board of the College of St. Benedict and is a supporter of the Wisconsin Singer Songwriter series in Mequon, Wisconsin. She is also an avid quilter. Diane currently resides in Thiensville, Wisconsin with husband, Shawn, and son.


Email:     Call: 414-745-4692

Amanda Polewczynski Client Controller

Milwaukee client controller Amanda Polewczynski

As Client Controller in Charge of Internal Operations, Amanda supports the team by bringing all the pieces together in a project management capacity and oversees the smooth running of the Giersch Group's many moving parts.  In addition to this, Amanda does her share of bookkeeping and accounting work.  Like all Client Controllers, Amanda is responsible for working with the Associates to deliver on our clients needs.  

Amanda has a Bachelors in Management, an MBA in Finance and 13 years experience at Reinhart Boerner Van Dueren, where she continues to work part time as an Accountant.  Outside of work, you will find Amanda with her husband and three sons. 

Email:     Call: 262-224-1996


Sara Douangvihanh Client Controller

Milwaukee financial controller


Email:     Call: 414-630-1224




Katie Perez Client Controller


Milwaukee financial controller Katie Perez

Katie studied business for one year at the University of Wisconsin Oshkosh, then transferred back to her hometown of Milwaukee, earning her Associates degree in Accounting at the Milwaukee Area Technical College.  She started as the receptionist for a small public accounting firm in Glendale, WI while she finished earning her degree.  Upon graduation, she was promoted to an accounting/bookkeeper position with the company where she gained experience with small business bookkeeping, payroll, and general knowledge of how small businesses operate.  From there she further explored the small business accounting world where she took on the entire bookkeeping and human resources duties for a Wisconsin restaurant chain.  Katie specializes in restaurant and retail accounting, loving the fact that no two days are ever the same.  During her time with the restaurant chain, Katie created and implemented a cloud-based customer order entry system that integrated with Quickbooks.  Katie is Quickbooks Certified.  Katie enjoys her volunteer work with adults with special needs that she has been a part of for over 10 years.  She also has a huge passion for health and fitness.  Katie currently resides in Milwaukee, WI with her husband Oscar and her three children. 

Email:     Call: 414-745-6333 

Tina Hannaman Client Controller

Milwaukee financial controller Tina Hannaman


Email:     Call: 262-352-4517





Paul Giersch Senior Associate

Milwaukee financial controller Paul Giersch

As a Senior Associate in charge of Operations, Paul is responsible for the bookkeeping operations of our clients, including payroll, bill pay, invoicing and sales tax. Paul oversees the work of the Associates and facilitates the communication with clients. Paul is the eldest of the five Giersch children and the first to join the family business. 

Paul is QuickBooks Online Certified ProAdvisor.  In his spare time he runs a gaming community server with over 2000 participants.  He is working toward his Bachelor's Degree in Finance and Accounting at the Lubar School of Business at the University of Wisconsin-Milwaukee.    

Email:     Call: 414-704-3640


Tom Grieve Partner

Tom and Peter have known each other for over 20 years. Tom was actually the first employee Peter ever had when Cathedral Consulting was starting in a basement in 2004. Tom went on to found and build his own very successful and highly awarded professional services firm (with a little help from Peter and the Cathedral Consulting team) that he still runs. When Peter left Cathedral to start The Giersch Group, Tom got the vision Peter was casting and promptly cast an even bigger vision. It did not take long to put it all together and a great partnership was born.

Giersch Group Lead Associates 

Joseph Neuberger Lead Associate

Hometown: Muskego, WI

College: University of Wisconsin-Milwaukee

Graduation Year: Spring 2019

Major: Finance and Certificate in Entrepreneurship

Honors/Awards: Dean's List




Milwaukee accounting associate Raiq Hussain


Raiq Hussain Lead Associate

Hometown: Chicago, IL

College: University of Wisconsin-Milwaukee

Graduation Year: Spring 2020

Major: Finance and Accounting

Clubs/Extracurriculars: Student Investment Club



Milwaukee accounting associate Collin Roberts


Collin Roberts Lead Associate

Hometown: Oshkosh, WI

College: University of Wisconsin-Milwaukee

Graduation Year: Spring 2020

Major: Finance and Supply Chain Management and Certificate in Entreprenuership

Clubs/Extracurriculars: Student Startup Challenge, UWM Cellegiate Entreprenuer's Organization

Honors/Awards: Awarded M&I Center for Business Ethics Scholarship, 1st place UWM Business Writing Competition, 3rd place Business Ethics Competition, Dean's List, Business Scholars, Awarded Robert W. Baird Business Scholars Scholarship, Beta Gamma Sigma Member


Giersch Group Associates 

We know that most small enterprises do not need a high priced CPA firm, nor are they big enough to bring the books in house or to hire their own CFO. Yet they want solid financial data and the best bookkeeping and accounting they can afford. We provide this to our clients by using a leverage model. Each client account has a Client Controller overseeing the work of our highly trained Associates. Our partnership with the UWM Lubar School of Business allows us to get the best and brightest business students to work at the Giersch Group. And on top of the training they get in their coursework, we have developed the Giersch Group Online Training Program to help them learn the finer points of bookkeeping, QuickBooks, and our Work Flow Process. Many of them have achieved their QuickBooks Pro Certification.


Milwaukee accounting associate David Giersch


David Giersch Associate



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About Our Logo

Milwaukee Giersch Group bookkeeping & consulting company headquarters

Countless studies show that there is no correlation between money and happiness; those who are wealthy are not necessarily happier than those who have less money, and vice versa. According to the Washington Post, once people surpass the level of poverty, money does not play a great role in day-to-day happiness. Yes, money can buy goods and services that bring temporary enjoyment, but these things do not directly address, let alone fix, the troubles people experience in their daily lives. 

If money only provides temporary enjoyment, then what’s the key to happiness? According to a study at University of California Berkeley, having higher quality of relationships has a greater impact on one’s quality of life and their overall happiness. By focusing on the well-being of others, people who are compassionate, generous, and generally cooperative have greater relationships between their colleagues, clients, family, and friends.

The Giersch Group logo represents the importance of balancing relationships and maintaining financial health. Our logo is a graphic representation of the fact that relationships are more important than money, while acknowledging that money gets involved in every relationship at some point, especially for a business owner. Getting your financials sorted out will improve relationships and make you happier.

Fostering Success by the Numbers

Half of all new businesses fail within five years; most don’t make it a decade.

Will your business beat the odds?

Your ideas can be brilliant, the market can be there for your services, but an unhappy relationship with numbers ruins everything.

Just a couple of unexpected cash flow hiccups made worse by the wrong action (or reaction) can be enough to cripple or kill a business when the numeric relationship is unhealthy.

Giersch Group Weekly Updates

When people come to the Giersch Group from another bookkeeping firm, we often hear that the client is leaving because of lack of communication. At the Giersch Group, we see communication as a vital aspect to understanding your books. To improve communication with our clients, we send out weekly updates. These updates help you understand what we are doing to fulfill your bookkeeping needs, allowing you to become familiar with the accounting process and, ultimately, know your company’s financial position.

The Giersch Group weekly updates include a brief review of what our associates have accomplished over the week and what we will work on in the future, as well as a description of other services we are providing for your company. We also include a reminder of our next scheduled meeting and your current billing status.

Overall, the weekly updates are here to keep you up to date on your financials and give you a clear picture of how your bookkeeping needs are being satisfied. Although we are an outsourced service provider, we see the success of our work in the level of collaboration we have with our clients. We want to partner with you to compile a clear and concise representation of your financial position.

How we make business cash flow planning crystal clear

Giersch Group bookkeepers, accountants and strategic consultants build and maintain relationships between business leaders and their numbers.

We balance your books and keep them balanced. We mentor business owners and leaders in the best financial practices used by the most successful corporations, adapted for the small enterprise.

Giersch Group services:

  • Provide clear, accurate, timely financials
  • Eliminate unpredictable financial events
  • Monitor risks
  • Demonstrate financial opportunities
  • Oversee payroll and insurance matters
  • Make filing your taxes and enduring audits easier 

With Giersch Group you’ll have by-your-numbers business mentors, happiness at your fingertips and a clear numeric path to success.

Get in touch for a free, no-pressure consultation today and we’ll show you how a healthy relationship with your numbers can conserve and generate profit.

Milwaukee Bookkeeping Professionals for Small Businesses & Nonprofits

The Giersch Group provides professional bookkeeping, accounting & consulting services for a wide variety of businesses throughout the greater Milwaukee area, Brookfield and Madison.

Our areas of expertise include working with the construction industry and contractors, professional services, the hospitality and service industry, and service organizations.

All types of businesses deserve and benefit from our bookkeeping, accounting and consulting services. We offer flexible services including outsourced, online, interim or part-time.

No matter what type of business or organization you’re running or the challenges you’re facing, we'll work with you to establish an affordable rate for services tailored to meet your business needs.

We provide accounting & consulting services from three Wisconsin locations

The Giersch Group has three convenient locations in Milwaukee’s lower east side, in Brookfield, and in Madison (click for map):

Northern Lights Building
1661 N. Water St., Ste. #408
Milwaukee, WI 53202

225 Regency Ct., Ste.
220 Brookfield, WI 53045

5610 Medical Circle
Madison, WI 53719

Although our virtual bookkeeping and CFO services are available anywhere, we primarily serve businesses located in and around Milwaukee, Ozaukee, Washington and Waukesha counties, including:

Milwaukee, Shorewood, Whitefish Bay, Glendale, Brown Deer, West Allis, Greenfield, Franklin, South Milwaukee, Oak Creek, Menomonee Falls, Sussex, Mequon, West Bend, Hartford, Kewaskum, Richfield, Cedarburg, Grafton, Saukville, Waukesha, Brookfield, New Berlin, Muskego, Big Bend, Mukwonago, Eagle, Dousman, Wales, Oconomowoc, Delafield, Pewaukee, Hartland and the surrounding communities.

How do you spell Giersch?

After hearing our ads on the radio, many people search for Gersh, Gersch, Girsh, Giersh or even Gursh Group.

Searches for, gersh wisconsin, gursh group or even gersh agency are often people looking for the Giersch Group in Milwaukee, Brookfield and Madison, Wisconsin.

Call us the Gersh Group, the Gersch Group, the Girsh Group, or Giersh Group - as long as you call us at 414-915-5800 for a free consultation to learn how our services can deliver improved financial results for your business.

We don't mind creative spelling - the accuracy of your business financials is what we obsess about.

However you write it, G-I-E-R-S-C-H spells the best value in Milwaukee bookkeeping & business consulting.

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Get a Free Consultation for Your Business

Schedule your free, no obligation consultation with the Giersch Group and get a free balance sheet analysis, a clearer picture of the financial health of your organization and answers to your questions.

Contact The Giersch Group online or call us at 414-915-5800


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