Our Team

Steffens & Styka PC

Daniel M. Styka, CPA
Daniel Styka has over 20 years of experience in public accounting. He has spent the last 20 years serving clients in the construction and real estate industries and preparing individual income tax returns.
Dan graduated from St. Norbert College in DePere, Wisconsin with a Bachelor of Science Degree in Business Administration with an emphasis in accounting.  He passed the CPA exam in 1999 and has been a licensed CPA since. Dan is also a member of the Illinois CPA Society.
Dan founded Steffens & Styka PC in January of 2009 with his business partner Dennis Steffens.

Dennis R. Steffens, CPA
(December 19, 1944- January 15, 2016)
Founding Partner and Mentor

Jennifer Warren, CPA
Staff Accountant
Jennifer graduated from Eastern Illinois University in 2000 with a Bachelor of Business and Science with an emphasis in accounting. She passed the CPA exam in 2001 and is licensed in Illinois.

Jennifer has over 9 years of experience in private accounting. She has experience in the manufacturing and financial industries where she specialized in profitability analysis, financial statement preparation. Budgeting and forecasting and financial analysis. She has been with Steffens & Styka since 2014. Jennifer has knowledge of construction accounting, corporate and partnership tax return preparation, individual tax return preparation, and payroll processing. Jennifer has extensive knowledge of Intuit Quickbooks, Microsoft Office and Outlook.

Michael Cieslak

Staff Accountant

Michael graduated from the University of Notre Dame with a Bachelor of Science Degree in Accounting

Michael has over 30 years of experience in the accounting industry. He has been an auditor and senior accounting manager in public accounting, a controller and CFO for two general contractors and a construction subcontractor before his coming to Steffens & Styka full time in 2016. He has an extensive background in construction and has the ability to work with clients knowing the specific issues business owners face. Michael is proficient in income taxes for individuals, partnerships, and corporations. He also has worked with several different construction software's, QuickBooks and Microsoft office products.

Erin Mattes
Staff Accountant
Erin graduated from DePaul University with a Bachelor of Science degree in Accounting.

Erin had over 13 years of experience in auditing, primarily in the field of compliance, prior to joining Steffens & Styka.  Erin also has an extensive background in customer service and working collaboratively with clients, attorneys and other industry professionals. Erin is knowledgeable about Quickbooks and Microsoft Office.

Mary Lou Danielson
Administrative Professional
Mary Lou greets our clients at the front desk, is the first voice you hear when you call our office and will direct your call to the person best able to serve your needs. Mary Lou, along with her highly competent administrative skills, is responsible for making sure our office runs smoothly. 
Mary Lou has over 30 years’ experience in the accounting industry servicing clientele and assisting the staff with various tasks. 
She has been with Steffens & Styka PC since its inception in January of 2009.

Patricia Cahill
Pat graduated from the University of Illinois with a Bachelor of Science degree in Accounting. She passed the CPA exam and began her career as an auditor at KPMG with a focus on commercial and governmental clients. She previously has experience in city government, retail accounting, and financial institutions serving as the accounting manager or controller. Pat has also worked per diem for 30 years primarily in partnership and individual tax return preparation. She is knowledgeable about QuickBooks and Microsoft Office.