
McDermott Will & Schulte has a sophisticated tax litigation practice representing clients in high-profile IRS examinations, federal tax court proceedings, and state and local tax disputes nationwide. The team regularly handles matters involving constitutional challenges, administrative appeals, and complex multistate controversy. The practice is jointly led by Washington DC-based Timothy Shuman and Chicago-based Catherine Battin, who focuses on constitutional tax disputes across the audit, administrative, and judicial phases. In New York, Michael Hilkin combines regulatory insight with federal tax litigation experience. Washington DC-based Stephen Kranz advises on digital advertising tax disputes and related constitutional litigation. In San Francisco, Charles Moll represents clients in tax controversies involving biotechnology property and handles proceedings at the administrative and appellate levels. Michael Scarduzio, promoted to partner in January 2026, focuses on US and international tax disputes, including civil and criminal tax litigation.
Legal 500 Editorial commentary
Accolades
Client satisfaction: Lawyer & team quality
Client satisfaction: Billing & efficiency
Client satisfaction: Sector knowledge
Client satisfaction: NPS ®
Key clients
- Apache Corporation
- Golden State Warriors
- Facebook Inc.
- Marathon Petroleum
- PepsiCo
- Philippe and Kathleen Mulacek
- Trail King Industries
- US Chamber of Commerce, NetChoice and the Computer & Communications Industry Association
- Genentech
Work highlights
Represented Apache Corporation in a new case against the IRS before the US District Court for the Southern District of Texas concerning a refund of income tax related to more than $50 million of research and development tax credits.
Represented the Golden State Warriors in various matters including a victory in a recent major property tax dispute over the valuation of their arena – Chase Center-and surrounding property.
Represented Marathon Petroleum in a dispute with Cook County, Illinois, over motor fuel taxes totalling over $15 million.
Lawyers
Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.

Practice head
Timothy Shuman; Catherine Battin
Other key lawyers
Michael Hilkin; Stephen Kranz; Charles Moll III; Michael Scarduzio
