About Mankus & Marchan, Ltd.

Mankus & Marchan, Ltd. is a boutique law firm with two offices located in the Western Suburbs of Chicago. The principals include Tony Mankus and Margarita Marchan-Mankus. Tony Mankus' practice focuses on tax controversies and bankruptcy; Margarita Marchan-Mankus' areas of practice include Social Security Disability and Real Estate.

Tony Mankus

Tony worked for the IRS from 1971 through 1986 out of various offices, including Newark, New Jersey, Office of International Operations in Washington, D.C., San Juan Puerto Rico, and Chicago, Illinois. He worked in what was then known as the Collection Division and performed the duties of a Revenue Officer and Group Manager, including 2½ years as Chief of several sections of the Special Procedures Branch which handled many of the legal issues for the Collection Division.

Since leaving the IRS in 1986, Tony has been in private practice as a tax law attorney and has represented taxpayers before the IRS, IDOR and IDES dealing with various tax issues, including collection, audit and criminal issues.

Tony's other area of focus is bankruptcy law. In the latter part of his employment with the IRS, he headed the insolvency sections of the Special Procedures Branch in Chicago dealing with bankruptcy, assignment for the benefit of creditors and other related issues. In private practice he has represented numerous individuals and small businesses in Chapter 7, Chapter 11 and Chapter 13 cases, especially individuals and businesses with tax problems.

Tony is licensed to practice before the Illinois Supreme Court, the U.S. District Court for the Northern District of Illinois, the U.S. Court of Appeals for the Seventh Circuit, the U.S. Tax Court and the U.S. Bankruptcy Court. He is, or has been, a member of the American Bar Association, the National Lawyers Association, the Illinois State Bar Association, The Chicago Bar Association, the DuPage County Bar Association, and the Baltic Bar Association. He was Chairman and/or a member of several committees in these bar associations, including tax and bankruptcy committees.

Tony is also experienced in working in a multi-cultural/multi-lingual environment. He was a Peace Corps volunteer for two years in Ecuador and worked with local farmers, credit cooperatives and other groups and individuals. When he was with IRS' Office of International Operations, he worked out of US Embassies and Consulates all over the world, including France, Switzerland, Mexico, Venezuela, Brazil, Argentina, Guam, etc. He lived in and worked for the IRS in Puerto Rico for close to three years. He speaks fluent Spanish. His wife and law partner is from Puerto Rico. He is also fluent in Lithuanian, his native tongue, and belongs to several Lithuanian or Baltic associations, including Chambers of Commerce and Bar Associations. As President of the Baltic Bar Association he helped to foster relationships with other Bar Associations, Chambers of Commerce, and individuals, one of whom is now the President of Lithuania.

Tony is a graduate of Fairleigh Dickinson University in New Jersey and the John Marshall Law School in Chicago. He has published various tax and bankruptcy articles in the "NLA Review," "DCBA Brief," and "ISBA's Federal Taxation." He has been a speaker or a panelist at Tax Seminars of the ISBA, DCBA and CPA groups, Symposia of the IRS/IACPA, meetings of chambers of commerce and training classes of the IRS.

Tony is married to Margarita Marchan-Mankus and has four daughters, ages 14 through 21.


Margarita Marchan-Mankus

Margarita graduated from the University of Puerto Rico, with honors, with a BBA in accounting and the University of Puerto Rico Law School. She was admitted to the Puerto Rico Bar in 1970 and began her legal career as a staff attorney for the Economic Development Administration of Puerto Rico. Subsequently she established her own private practice in San Juan, Puerto Rico.

In 1990 she was admitted to the Illinois Bar and became a partner with the law office of Tony Mankus. She is in charge of the law firm’s Aurora office where she focuses on Social Security Disability claims and real estate matters.

Ms. Marchan-Mankus is licensed to practice before the Supreme Court of Illinois and the Supreme Court of Puerto Rico. She is a member of the Illinois State Bar Association and the Puerto Rico Bar Association.


  Postal Address:
Electronic Mail
Tony Mankus 5950-E Lincoln Ave.
Lisle, IL 60532-3387
(630) 960-0500 (630) 960-0601 tman@irstax.com
Margarita Marchan- Mankus 64 E. Downer Pl.
Aurora, IL 60505
(630) 896-8343 (630) 896-2159 margaritamarchan@hotmail.com

Home | Services | Options | Email | ©2005, Mankus & Marchan, Ltd.
Web Design by Camille Mankus