LyndonSommer2Lyndon Sommer
Lyndon Sommer, B.S. (Acct.), M.Acct., Registered CPA (Ill.), J.D., is a shareholder of Sandberg Phoenix & von Gontard. The majority of his work is in the areas of commercial and product liability litigation.

He has tried cases in federal and state courts in  Missouri and Illinois. Lyndon has received jury verdicts on behalf of plaintiffs and defendants. He has also  argued multiple cases before the United States Courts of Appeal for the Seventh and Eighth Circuits, as well  as the Illinois Appellate Court and Missouri Court of Appeals.

Lyndon specializes in defending accountants in professional negligence cases. He has successfully defended accountants at trial and on appeal. Lyndon has defended accountants in cases pending in Missouri and Illinois state courts. In addition, he has defended accountants in federal court and is very familiar with federal procedure and expert requirements. Lyndon has defended accounting professionals in almost 100 cases.

As part of his professional liability practice, Lyndon has defended attorneys and financial advisors in litigation and arbitration. He has also defended professionals in the construction industry.

Lyndon is a member of the Professional Liability Underwriting Society, the Missouri Society of CPAs and the American Association of Attorneys/Certified Public Accountants.

Before he began practicing law, Lyndon authored numerous tax articles which were published in legal and accounting journals including the Practical Accountant, Taxes –The Tax Magazine, Taxation for Lawyers, The Review of Taxation of Individuals, North Dakota Law Review and Southern Illinois University Law Journal. In addition, he wrote the first chapter of a book entitled, How to Deal with the IRS.

Lyndon earned his Juris Doctor at Southern Illinois University School of Law in 1992, where he was the Editor in Chief of the Southern Illinois University Law Journal. He earned a Masters degree in Accountancy in 1989 and a B.S. in Accounting, in 1987 from Southern Illinois University, Carbondale.


St. Louis  |  Clayton  |   Kansas City


Alton  |  Carbondale  |  Edwardsville  |  O'Fallon

The information on this website is for general information purposes only. Nothing on this site should be taken as legal advice for any individual case or situation.
This information is not intended to create, and receipt or viewing does not constitute, an attorney-client relationship. © 2014 Sandberg Phoenix & von Gontard P.C. All Rights Reserved.