Heather Sisto Koontz

Sheila Millar leads Keller and Heckman’s consumer protection regulatory practices and brings deep experience to a range of public policy and regulatory matters, including advertising and promotions, sustainability and environmental claims, connected products, privacy, cybersecurity, and product safety. She counsels United States (U.S.) and international businesses on compliance questions and processes, represents them in regulatory enforcement matters, and advocates on their behalf befo...

When asked about Paul Schwinn, clients most often comment on his demeanor, his responsiveness and his business-minded approach to legal issues and opportunities. Working with clients across a wide range of industries, including technology, hospitality (including restaurants), oil and gas, biotech and government contracts, Paul provides counsel on a wide variety of transaction structures commonly utilized in such industries. Clients view him as an all-around business and legal advisor. During ...

Mary Pivec, based in Woodbridge, Virginia, brings over 45 years of experience as a dedicated management-side immigration and employment attorney at Pivec & Associates PLLC. Mary's immigration law practice is centered on the vital connection between immigration enforcement and labor protections. She represents employers in various cases, including worksite enforcement, I-9 compliance, and investigations by the U.S. Department of Labor's Wage and Hour Division. Her work encompasses civil an...

Dara Levy helps pharmaceutical and medical device companies on a wide range of issues relating to product communications, marketing, and import/export. Dara assists clients with products in all stages of development to design engaging communications compliant with FDA legal and regulatory requirements. In the pre-marketing stage, Dara works with companies to strategically communicate with investors, potential marketing partners, and the scientific community, as well as implement effective dis...

Michael Lazarus advises domestic and international clients in the telecommunications industry on transactional and regulatory matters and represents them before the Federal Communications Commission (the FCC) and state and local regulatory bodies. He represents mobile and fixed service providers of broadband and narrowband services delivered over landline and cable networks, terrestrial wireless systems, satellites and the Internet. His experience includes: FCC regulations applicable to wirel...

Christopher S. Rizek is a Member in Caplin & Drysdale's Washington, D.C., office. He also serves as General Counsel to the firm. In 2014, he was listed in the elite "Leading Lawyer" list for Tax Controversy by The Legal 500 . Services Mr. Rizek represents taxpayers in all types of federal civil and criminal tax controversy matters. He also guides clients through IRS audits, prepares administrative claims and protests of IRS actions, and litigates tax and tax-related cases in U.S. district...

Nathaniel Cushman is a lawyer recognized by Best Lawyers in the practice area of Real Estate Law. Nathaniel practices law in Washington, District of Columbia Best Lawyers has recognized Nathaniel Cushman since 2025. 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 Nathaniel Cushman is held by other lawyers.

David M. DeSalle is a lawyer recognized by Best Lawyers in the practice area of Energy Law. David M. practices law in Washington, District of Columbia Best Lawyers has recognized David M. DeSalle 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 David M. DeSalle is held by other lawyers.

Michael D. Hausfeld is a lawyer recognized by Best Lawyers in the practice areas of Antitrust Law and Litigation - Antitrust. Michael D. practices law in Washington, District of Columbia Best Lawyers has recognized Michael D. Hausfeld since 2006. 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 Michael D. Hausfeld is held by other lawyers.

Paul F. Forshay is a lawyer recognized by Best Lawyers in the practice areas of Energy Law and Energy Regulatory Law. Paul F. practices law in Washington, District of Columbia Best Lawyers has recognized Paul F. Forshay 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 Paul F. Forshay is held by other lawyers.