Our connections, your business.

For decades, Dugan + Lopatka has been an active member of the business and financial community, with numerous memberships and affiliations. Along the way, we’ve fostered connections with trusted professionals and organizations from a wide range of industries.

What does that mean for you? By building a network of relationships, our financial experts can leverage our connections to complement our capabilities, enabling us to access a wide range of skills, technologies and resources to provide the comprehensive services our clients need.

Scroll down to explore our connections and learn how they help us better-serve your business.

Professional Memberships & Affiliations

  • Illinois CPA Society

    IL CPA SocietyThe Illinois CPA Society provides continued education and advocacy to over 22,600 accounting and finance professionals in Illinois. Members of the Illinois CPA Society are expected to uphold standards of ethics, and firms are required to participate in Peer Reviews every three years.




  • The American Institute of CPAs (AICPA)

    The American Institute of CPAs (AICPA) is the largest membership association representing the accounting profession worldwide, with over 431,000 members in 130 countries.

    AICPA’s G400 represents the largest 400 public accounting firms in the United States outside of their Major Firm’s Group (top 100 firms). G400 firms commonly serve small- and mid-sized businesses. G400 status allows D+L direct access to collaborate with industry leaders throughout the United States, thereby enhancing our ability to service our customers.

  • PrimeGlobal

    Dugan + Lopatka is a member of an international association of independent accounting firms located across the globe called PrimeGlobal. This affiliation allows us to provide our clients with the services of a larger, national CPA firm.

    As a member of PrimeGlobal, we have access to CPA firms nationally and internationally to consult on complex, location-specific tax issues, as well as share best practices with similarly positioned accounting firms.

Business & Industry Memberships

  • Choose DuPage

    Choose DuPage is the economic development organization for DuPage County, Illinois. A public/private partnership, Choose DuPage works to grow, retain, and attract businesses, support county-wide economic development initiatives, and address policy issues critical to the needs of the regional economy.

  • Valley Industrial Association

    Valley Industrial Association (VIA) represents more than 200 members, including manufacturing and industrial companies and their suppliers and vendors. VIA provides valuable education, resources, and networking opportunities to the manufacturing industry.

  • Naperville Area Chamber of Commerce

    As one of the largest Chambers in Illinois, the Naperville Area Chamber of Commerce (NACC) represents over 1,100 businesses and organizations throughout the region. As they work to grow the economy, the NACC provides members and the community with advocacy, education, and connections to a diverse range of businesses.

  • Plainfield Shorewood Area Chamber of Commerce

    The Plainfield Shorewood Area Chamber of Commerce (PSACC) works to grow businesses and the economy within their communities. The PSACC provides Member businesses with networking opportunities, advertising, and access to workshops and training.