FacultyFaculty/Author Profile

William S. DeCarlo

Sidley Austin LLP

Chicago, IL, USA

BILL DECARLO has over 38 years of transaction and related legal experience. His transaction experience includes private and public merger and acquisition transactions, private and public credit agreements and debt issuances, reorganizations and the formation of partnerships, limited liability companies, and joint ventures, and negotiations of business agreements.

For over 26 years, Bill has provided legal advice and related business counsel to Telephone and Data Systems, Inc., a publicly traded telecommunications holding company, now a Fortune 1000® company, and its public and private subsidiaries. TDS’s subsidiaries include United States Cellular Corporation, a public traded subsidiary of TDS, that is the fifth-largest wireless service provider in the United States, TDS Telecommunications Corp., which provides local and long-distance telephone services, OneNeck IT Solutions LLC, which provides data center and related managed and IT solution services and TDS Broadband LLC, which provides cable and broadband services.

Since 2000, Bill has served as the non-executive, general counsel of TDS, and as such has provided advice and counsel on corporate governance matters, regulatory issues, and other legal affairs of the company, and has general oversight of the work of other attorneys on various legal matters for the company.

Representative matters that are public include:

  • The acquisition of wireless and voice data companies and assets, traditional telephone companies, hosted and managed services companies and cable/broadband companies
  • The divestiture of wireless voice and data assets
  • The formation, consolidation and dissolution of partnerships, limited liability companies and joint ventures
  • Overseeing litigation and settlements relating to partnership disputes, including rights of first refusal, valuations and other partnership matters, intellectual property rights and other business disputes
  • A lengthy reorganization of a wireless company, including related litigation with government and corporate creditors

Bill is a graduate of Georgetown University Law School. Prior to attending law school, he earned a M.A. Finance at the University of Pennsylvania, and a B.S. Economics at the Wharton School, University of Pennsylvania.


Admissions & Certifications
  • Illinois, 1986
  • New York, 1977

  • Georgetown University Law Center, J.D., 1976
  • University of Pennsylvania, M.A., 1976
  • University of Pennsylvania, B.S., 1971


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