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Our Value

Our Value

THE WINKLER GROUP LLC is a law firm dedicated to the core principle of providing exceptional, personalized client service. We strive to deliver this through our Knowledge, our Experience and our Commitment, achieving unparalleled Value for our clients.


Thomas W. Winkler is a licensed Illinois attorney and Illinois Certified Public Accountant. He has been practicing in Illinois since 1982. Tom has spoken and written on many legal topics on behalf the: Illinois Bar Association; Chicago Bar Association; American Institute of Certified Public Accountants; Illinois CPA Society; Illinois Manufacturers’ Association; National Business Institute; Illinois Institute of Continuing Legal Education; and many local bar associations.

John B. Sprenzel began working as a law clerk in 2002 and became a licensed Illinois attorney in 2009. John focuses his practice on the areas of property tax assessment appeals, complex business planning, commercial and residential real estate, general estate planning, and mechanics lien dispute resolution. He has been published in the Dispute Resolution Journal, a quarterly publication of the American Arbitration Association.


Our attorneys have over 35 years of experience practicing law in the State of Illinois. Our experience has been almost exclusively in the area of representing entrepreneurial individuals and protecting their personal, investment and business interests.

We serve on national associations, and have taken active roles on committees of the: American Institute of Certified Public Accountants; National Association of State Boards of Accountancy; Independence Standards Board and Illinois Department of Revenue. We are active participants with the State of Illinois Board of Examiners and the Illinois CPA Society. We are involved with local chambers of commerce, homeowners associations, YMCA youth groups and church youth religious education programs, and we serve on Boards of Directors for a number of businesses and not-for-profit organizations.


The cornerstone of our practice is our commitment to our clients and our goal is to achieve yours. We are committed to understanding and evaluating the facts and the law applicable to each client’s situation, before advising on an appropriate legal plan of action. In the fast-paced ways of our clients’ lives and business, easy accessibility and prompt responsiveness further demonstrate our deep commitment to achieving our clients’ goals.

Value to Our Clients

We treat and care for each client issue with the same diligence and prudence that we would exercise if it was a matter that personally affected our own lives. We devote the time and the skill to thoroughly analyze each particular situation, so that we can formulate a legal plan that attempts to optimize our client’s position in the most cost-efficient manner. The quality and depth of our knowledge, our experience and our commitment enhance the value that we bring to each one of our clients.