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Mary Shellenberg is a hands-on business lawyer and strategic advisor. For more than four decades, she has focused her practice on corporate law, complex transactions and employee benefits. Mary is a relationship-oriented attorney who is pragmatic, detail-oriented and able to establish immediate confidence with clients and their constituents alike. Mary’s combination of sound business judgment and legal skills allow her to provide the workable solutions her clients’ need. Mary is appreciated for her commitment to her clients and responsiveness.

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In her corporate practice, Mary advises on compliance and governance issues and entity selection and formation. She is involved in major transactions such as mergers, acquisitions, divestitures and corporate restructurings, business and corporate financings, as well as a broad array of other deals that are valued from tens to hundreds of millions of dollars. She consistently delivers merit beyond the law by analyzing the immediate transaction and anticipating issues and obstacles that will affect her clients’ ultimate objectives.

In the area of employee benefits, Mary counsels clients regarding the implementation and maintenance of qualified plans, non-qualified plans and executive compensation arrangements. She also advises clients on the correction of plan failures under various voluntary correction programs. In addition, she counsels clients with respect to benefits issues in business transactions.

Mary is a regular speaker at firm sponsored seminars and events, and a frequent contributor to firm publications. In addition to her active legal practice, Mary served on the firm’s Management Committee for many years.

Practice Areas


  • Loyola University Chicago School of Law, J.D., 1974
  • Mundelein College, B.A., 1971


  • Illinois
  • U.S. District Court, Northern District of Illinois


Broad range of business matters with transaction values ranging from $50,000,000 to $325,000,000.

Acquisition of a consumer products manufacturing business involving multiple U.S. facilities and related entities.

Sale of a worldwide group of companies in a series of transaction closings.

Sale of a high-tech equipment manufacturer involving negotiation of related supply and distribution arrangements and establishment of related joint venture.

Strategic acquisition of a start-up software company.

Acquisition of a renewable energy equipment manufacturer.
Sale of a software consulting company to private equity investor.
Structuring, negotiation and closing of various forms of financing including equity based, securitized and traditional loan financings.
Assisting in a cross-border expansion in the Americas through acquisitions and establishment of newly for subsidiaries and joint ventures in Canada, Mexico, Brazil, Argentina and Columbia.
Professional Activities