414-529-2071 info@jaschilz.com

Meet our team


Joe Schilz



Joe has spent his entire professional career in the accounting business, establishing his practice in 1987 after working for four years as an auditor for the Wisconsin Department of Revenue.

Joe is a Muskego native and high school graduate, and earned his Bachelor of Business Administration from UW-Whitewater in 1983, with a major in Accounting. Joe and his wife Jackie have three daughters, Gina, Abby, and Josie.


Brian Dziak



Brian is long-time team member, joining us in 1993 after earning his Bachelor of Science in Accountancy from Marquette University in 1991.

Brian is a business expert, specializing in management consulting and tax planning for small-to-medium sized companies. He has over fifteen years’ experience working with and consulting to privately-held companies and S-corporations, typically performing vital services like reviewing financial statements and performing tax planning and preparation.


Mike Murphy



Mike has over 25 years of business operations and accounting experience. He graduated from UW-Whitewater with a BBA in Accounting.

Mike and his wife Judi reside in Brookfield. They have two grown children; Jake is also a CPA, and Kelli is a social worker. Mike and Judi enjoy sports, travel, projects around the house, and time spent with friends and family.


Don't Be Shy. Get In Touch.

If you are interested in working together, send us an inquiry and we will get back to you as soon as we can!

Carl Busateri


Carl was born and raised in Milwaukee, and makes his home in nearby St. Francis. A graduate of Bay View High School, Carl studied at Marquette University before joining the Air Force and serving in Vietnam as a disc jockey [“Good Morning, Vietnam!”]. Leaving the service in 1976, Carl joined his father’s accounting practice and has been in the business full-time ever since.

Carl has been married for 30+ years to Roberta [also a Bay View grad], and their daughter Meghan recently brought granddaughter Layla into their lives. Never forgetting his roots, Carl is actively involved with Milwaukee’s Italian Community Center, and serves as Treasurer of the Order of Sons of Italy [Grand Lodge of Illinois and Wisconsin], and he loves to spend time traveling, experiencing the outdoors, hiking, swimming, and reading.


Tammy Kersten, EA


Tammy is another “local treasure”, an alumnus of Franklin High School and UW-Milwaukee, where — like Joe — she earned a Bachelor of Business Administration with a major in Accounting. Since joining our team in 1997, Tammy has proven herself a strong asset to small businesses, specializing in financial statement compilation and QuickBooks accounting; and for individuals, Tammy is an ace tax accountant.

Married with two grown children, Tammy and her husband enjoy going to baseball games, taking motorcycle rides, visiting coffee shops, and traveling.



Mitch Longley


Mitch is a Bookkeeper and Payroll Specialist here at Joseph A. Schilz, S.C. Graduating from MATC in 2012 with a degree in accounting he immediately jumped right into the accounting and tax profession. He enjoys learning and exploring every option that a career in accounting has to offer.

Growing up in Grafton and now living in Menomonee Falls, Mitch enjoys spending time with his wife and family. He also enjoys playing golf any chance he can get.

Janice Lien

She is the first of many friendly faces you will encounter when visiting our offices, familiar to many after nearly 15 years with our team. A Milwaukee native, Janice is a “master-juggler” who keeps things humming in the front-office.

Besides having great organizational skills, Janice has a strong creative side as well — she’s a “transplant” from the advertising biz, where she’s been a graphic designer and art director. Her college-aged daughters, Brianna and Brittany, follow in the artistic tradition with their studies in architecture and art history. In her free time, Janice enjoys crafts [anything with art and design!], reading, and music, and is a member of the Polish Hertitage Alliance.