Jerry Feffer had a nationwide white-collar criminal defense practice that included trials and government investigations throughout the country.  He had been identified as one of "Washington's Top Lawyers" by Washingtonian magazine, and was ranked as one of the 20 Best Go-To Litigators by the Legal Times in the D.C. area.  The survey identified ace litigators who were at the top of their game.  As a former Deputy Assistant Attorney General, Tax Division, in charge of criminal investigations, he had developed a national practice representing clients under investigation for criminal tax fraud/money laundering violations.  He had successfully represented at trial an accountant in a major prosecution in Washington, D. C., involving allegations relating to the preparation of hundreds of false income tax returns.  Mr. Feffer had served as Chairman of the American Bar Association's Annual National Institute on Criminal Tax Fraud (24th year) and was a former Chairman of the Association's Criminal Tax Committee.

Mr. Feffer had also successfully represented many clients under investigation in such areas as health care, banking, securities, and environmental fraud.  For example, he had successfully represented a lawyer in a major health care fraud trial in Kansas City, as well as executives in health care fraud grand jury investigations.  Mr. Feffer had also advised major corporations and individuals concerning the application of the Foreign Corrupt Practices Act since the Act's passage in 1977.  He had conducted internal investigations and represented clients in negotiations with the government.  Mr. Feffer was a Fellow in both the American College of Trial Lawyers and the American College of Tax Counsel.  He was a frequent speaker and contributing author to white collar crime institutes, seminars and publications.  He was the past Chairman of the Board of Beauvoir School in Washington, D.C. and was a member of the Board of the Field School.