Patrick M. McMahon

Patrick M. McMahon focuses his practice on guiding businesses through complex transactions with steady, informed counsel. He assists organizations at various stages of growth, helping them address corporate needs involving acquisitions, operational planning, and long-term structuring. His approach emphasizes clarity, efficiency, and ensuring that each client understands the legal steps shaping their business decisions.

Patrick completed his education with a B.A. from Indiana University School of Business in 1988, building on foundational studies after Prospect High School, Class of 1984. He later earned his J.D. from John Marshall Law School in 1993. This academic progression shaped his practical approach to analyzing commercial issues and crafting solutions that support both stability and growth.

Patrick applies experience across mergers and acquisitions, financing arrangements, joint ventures, and commercial real estate transactions. His work includes preparing and reviewing employment matters, handling succession planning, and advising owners of limited liability companies, partnerships, corporations, and sole proprietorships. Each engagement centers on understanding the client’s operational goals and aligning transactional strategy accordingly.

Patrick also assists individuals and families in their personal estate planning matters. He prepares comprehensive documentation, evaluates future needs, and supports clients in structuring plans that offer clarity and protection. His estate planning work extends his commitment to helping clients manage legal responsibilities with confidence and long-term foresight.

Patrick began his career as a litigation associate with a large Chicago law firm, where he developed skills in evaluating disputes and understanding the challenges businesses encounter. This early background gives him perspective when advising clients on transactions, allowing him to anticipate issues and streamline matters before they develop into larger concerns.

Patrick M. McMahon continues to provide guidance shaped by decades of hands-on experience. He works to simplify complicated matters, communicate clearly, and ensure clients feel supported through every stage of a transaction or planning process, always prioritizing practical direction and reliable representation.

Law Office Affiliations

• Partner, DKM&O Law
• Member, Illinois State Bar Association
• Former Director & Executive Committee Member, Arlington Heights Chamber of Commerce

Licensed State

• Illinois

Education

• John Marshall Law School
  Juris Doctor (J.D.)
• Indiana University School of Business
  Bachelor of Arts (B.A.)

Awards & Badges