Dan H. Renberg

Michael Huston counsels clients in high-stakes litigation matters, with a particular focus on crafting winning appellate strategies. He is also sought after for his deep knowledge of administrative law. Michael’s representations are informed by his experience in the Office of the Solicitor General at the U.S. Department of Justice (DOJ), where he represented the federal government before the Supreme Court of the United States. As an Assistant to the Solicitor General, Michael argued nin...

Adam Herzog, a partner of Katz Banks Kumin, joined the Firm in December 2013. Mr. Herzog has represented numerous clients pursuing whistleblower tips before the SEC, CFTC and FINCEN and has successfully assisted them in earning millions of dollars in award payments. Three of Mr. Herzog’s clients received SEC whistleblower awards in the second half of 2023 alone, some of whom participated in a $104 million total award that was the fourth largest in the SEC program’s history. Detail...

Susan is a go-to tax controversy counsel for the financial services industry and other highly regulated industries, as recognized by The Legal 500 US , Lawdragon's “500 Leading Global Tax Lawyers” and “500 Leading Global Litigators,” and The Best Lawyers in America® . Susan is co-chair of the firm's Tax Controversy & Criminal Tax Practice. She represents clients in all phases of administrative investigations and disputes, as well as litigation and appellate wor...

Patricia Harris is a land use attorney at Lerch, Early & Brewer in Bethesda, Maryland. She assists developers and property owners with securing approvals needed to develop their properties, including site plans, special exceptions, subdivision approvals, historic preservation, local map amendments, zoning text amendments, master plan recommendations and building permits in Montgomery County, Maryland. Pat is knowledgeable about transit-oriented, mixed-use development and other issues rela...

Shawn Sukumar is a lawyer recognized by Best Lawyers in the practice area of DUI / DWI Defense. Shawn practices law in Washington, District of Columbia Best Lawyers has recognized Shawn Sukumar since 2027. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Shawn Sukumar is held by other lawyers.

Ronald Machen, a member of the firm's global Management Committee and Chair of the Firm’s Litigation and Controversy Department is one of the nation's leading trial and white-collar defense lawyers. His practice focuses on government enforcement, corporate and congressional investigations, and litigating civil business disputes. An experienced litigator who has tried more than 35 cases to verdict, Mr. Machen specializes in litigating complex criminal and civil actions. He also routinely...

Carl C. Risch is a lawyer recognized by Best Lawyers in the practice area of Immigration Law. Carl C. practices law in Washington, District of Columbia Best Lawyers has recognized Carl C. Risch since 2026. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Carl C. Risch is held by other lawyers.

Chair of Stein Sperling’s nationally regarded tax law group, David De Jong is a recognized and highly sought industry authority with more than 40 years of experience. Raised in Montgomery County, David always intended to practice law in his “home town”. He has been instrumental in maintaining Stein Sperling’s collegial, small-firm feel while helping its tax department grow into a regional powerhouse. David has a gift for putting himself in his clients’ shoes to g...

Richard T. Collins is a lawyer recognized by Best Lawyers in the practice area of Insurance Law. Richard T. practices law in Washington, District of Columbia Best Lawyers has recognized Richard T. Collins since 2021. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Richard T. Collins is held by other lawyers.

Ellen K. Harrison advises clients on a broad range of tax issues, including estate planning and administration, tax controversies, and income, gift and estate tax planning for individuals, businesses and charitable organizations. She has significant experience drafting wills, trusts, powers of attorney, prenuptial arrangements and buy-sell agreements, as well as a broad range of corporate documents and family partnership agreements. Her tax controversy and litigation experience includes Inter...