Who We Are

“Ron is very personable and extremely knowledgeable.  He is always a professional when serving our nonprofit organization.”

— New Star Services

Learn More About Ron Marklund
Who We Are

“As our tax accountant, Pete is very responsive and always available to assist.”

— Matrex Exhibits

Learn More About Pete Zich
What Our Clients Say

“Dugan & Lopatka wasn’t just a regular partner, they became a part of our family business.”

–Wisdom Worldwide Adhesives

Learn more about our work with Wisdom
top accounting firm in chicagoland

Dugan & Lopatka is one of the top thirty largest accounting firms in the Chicago area according to Crain’s Chicago Business and the Daily Herald Business Ledger.  Located in the western suburbs, but serving all of the Chicago area, Dugan & Lopatka is the right choice for small and mid-sized closely-held businesses.

Our services

What We Do

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By The numbers

D&L At A Glance

  • 44 Years in business
  • 43 Employees
  • 785 Years of experience
  • 5500 Local businesses served
Change moments

Serving Your Business Through Times of Transition.

In the life cycle of every company, from its start to when the owner(s) leave or sell the business, there are unique moments that challenge each business and its owners. It is during these unique Change Moments that the support of a strong CPA advisor and friend can be vital.

If one of these Change Moments is keeping you up at night, contact us to learn how we can help you through it. get in touch
Common Change Moments:
  • Changing Accounting Firms
  • Going for Bank Financing
  • Handling Fast Growth
  • Acquiring or Merging A Company
  • Selling or Exiting Your Company
The Dugan & Lopatka Difference

What Our Clients Say

"Dugan & Lopatka wasn’t just a regular partner, they became a part of our family business." Watch this brief video to learn more about the D&L and Wisdom Adhesives relationship, or click below for a deeper dive. Jeff Wisdom Former President, Wisdom Adhesives Worldwide

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"When reviewing CPA firm RFP's, Dugan & Lopatka scored so much higher than their competitors that we didn't interview other firms." Watch this video to learn more about the D&L and New Star Services relationship, or click below for a deeper dive. New Star Services Greg O'Brien, CFO

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