A. Leon "Leon" Sarkisian

A skilled negotiator and litigator, partner Michael F. Koenigsberger focuses his practice on family law- related matters. Recognized as one of Chicago’s leading lawyers in family law, he has represented hundreds of clients in complex custody and financial issues, prenuptial agreements, paternity cases and domestic relations. Particularly adept at dealing with high-asset, complex cases, Michael takes pride in working with clients through all phases of the issues they face, from litigatin...

Valentina Famparska concentrates her practice on the federal income tax aspects of complex business transactions and entities, including mergers, acquisitions, leveraged buyouts, private equity investments, formation of private equity and real estate funds, formation of joint ventures and partnerships, and management compensation. Valentina also works with the firm's health care practice, sports and sports facilities practices, financial services practice and the trusts & estates practice...

Paul T. Jenson is a top attorney recognized by Best Lawyers in the practice area(s) of Gaming Law. Paul T., who practices law in Chicago, Illinois, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Paul T. is held by other top lawyers in the same geographic and legal practice area.

Rich Ungaretti’s practice encompasses all aspects of commercial real estate. He represents owners, developers, lenders and investors in acquisitions, sales, leasing, work outs and development. His practice includes the formation of partnerships, joint ventures and limited liability companies. My focus Real Estate Transactions Today, many real estate deals are large and complex. My work involves managing the process, structuring the transaction and leading the negotiations. Recently, I m...

Julia Mano Johnson is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Julia Mano, who practices law in Chicago, Illinois, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Julia Mano is held by other top lawyers in the same geographic and legal practice area.

Jason S. Ornduff advises high net worth families, business owners, executives, professionals and celebrities on state and federal laws regarding wealth transfer to the next generation, including estate planning, estate and trust administration, and estate and gift tax issues. Jason also counsels closely-held companies on various legal issues, especially in the areas of succession planning. Jason is a past president of the Greater North Shore Estate and Financial Planning Council. He is also a...

David Zwaska is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law and Family Law Mediation. David, who practices law in Chicago, Illinois, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which David is held by other top lawyers in the same geographic and legal practice area.

Mr. Sevin concentrates his practice exclusively in the area of family law, representing parties in the litigation and resolution of sophisticated matrimonial and family related matters. He counsels clients on a wide range of divorce-related issues including custody disputes, analysis of complex financial matters, prenuptial and postnuptial agreements, and the disposition of marital and non-marital assets. Mr. Sevin’s peers and colleagues have recognized him as a leading advocate for his...

Born and raised in the Chicagoland area, John grew up working in his family’s restaurant and then stayed local attending both Northwestern University (B.A.) and Notre Dame Law School (J.D.). As a first generation Greek American, John witnessed the difficulties that immigrants can experience while adapting to a new culture. He also experienced the importance of community in helping people to assimilate and understand how to become part of that new culture. He is fluent in Greek and has b...

Martin G. Durkin is a trial lawyer whose practice includes antitrust and commercial litigation. He has successfully litigated business and transactional disputes, and tried many complex commercial matters. Mr. Durkin's practice is focused on commercial matters, including breach of contract, business torts, RICO, securities fraud and consumer fraud. Mr. Durkin has also represented a number of Fortune 500 companies in the defense of class actions and mass actions. Representative Matters Class A...