Our Team



Kollath CPA is a team of dedicated tax and accounting professionals who are passionate about helping their clients succeed. We utilize the latest technology to provide one-on-one service, and are focused on helping businesses, nonprofits and individuals reach their goals.


Our Brookfield Team

Mike Brand, CPA, Manager

Carol Van Duser, CPA

Julie Brand, Tax Preparer 

Our Middleton Team

Mike Kollath, CPA, Partner
Mike Brand, CPA, Partner

Aimee Kent, Accountant
Bob Steinich, Senior Accountant

Bonnie Watson, CPA, Accountant

Carmen Jeschke, CPA, Senior Accountant

Emily Bartling, Accountant

Emily Upstrom, Accountant

Chantel Schmitz, Seasonal Tax Administrator

Chris Roche, Senior Accountant

Chris Flessert, CEBS, SPHR, HR Specialist

Carole Ruiz de Chavez, CPA, Seasonal Tax Accountant

Cindy Gillis, Seasonal Tax Consultant & Accountant

Gail Gordon, CPA, Seasonal Tax Consultant

Jared Krueger, CPA
Jessica Primrose, Administrative Assistant

Karen Ganser, Accountant

Querida Lu Ahn Funck, Firm Administrator

Randy Diehl, CPA, Senior Accountant

Rose Nguyen, Senior Accountant

Shelly Bartelt, Seasonal Tax Accountant

Tracy Gast, CPA, Senior Accountant


Our Sauk Prairie Team

Julie Miller, CPA Partner

Allan Schmid, CPA

Jenny Pickhard, Accountant & Payroll Specialist

Julie Brickl, Accountant

 Katie Tiesing, Administrative Assistant & Bookkeeper


Staff on the Move

Nick Curran, CPA, CNAP, Founder of n4n

Alex Moskoff, Accountant

Andrea Conrad, Executive Assistant

Brenda Weinke, Accountant

Erin Long, Payroll Specialist

Kelly Kutler, Payroll Consultant

Kelly Woger, Nonprofit Consultant

Lynda Tanner, CPA, CGMA, Nonprofit Consultant

Sarah Winkler, Accountant 
Steve Hingle, CPA, Nonprofit Consultant


Middleton 608.824.3002         Sauk Prairie 608.644.0206       Brookfield 414.751.6847

Middleton, WI 

Kollath CPA

2501 Parmenter Street, #100B

Middleton, WI 53562


PHONE: 608-824-3002

FAX: 866-486-4261


Sauk Prairie, WI 

Kollath CPA

421 Water St., Suite 111

Prairie du Sac, WI 53578


PHONE: 608-644-0206

FAX: 608-643-3467


Brookfield, WI 

Kollath CPA

295 Regency Court, Ste. 104

Brookfield, WI 53045


PHONE: 414-751-6847

FAX: 866-486-4261