Mark Daniel Davis is a partner with the law firm Harris, Wiltshire & Grannis LLP, where his practice includes a wide variety of litigation and telecommunications matters.

Civil LitigationMr. Davis represents clients at all stages of civil litigation including complex federal and state trial-level proceedings, and in arbitrations. He regularly authors briefs before the U.S. Supreme Court and the federal courts of appeals, and has worked on appeals involving a wide range of issues-including administrative law, federal pre-emption, bankruptcy, environmental law, sovereign immunity, the First Amendment, and the Religious Freedom Restoration Act, among others. Some of his noteworthy representations include:

Successfully represented a telecommunications company in the first major federal abstention case in the U.S. Supreme Court in more than twenty years, which resulted in a 9-0 decision in our client’s favor.Obtained a multimillion-dollar breach-of-fiduciary-duty judgment against a major bank for failing to diversify trusts under its management.Represented provider of Telecommunications Relay Service in D.C. Circuit appeal of ratemaking decision by the FCC.Successfully challenged a perpetual exclusive video access arrangement under a 2007 Order of the FCC; defended that outcome on appeal in the first appellate case to affirm that courts could strike down easements under that order.Represented a government contractor in a ten-day arbitration involving alleged breach of a $37 million teaming agreement.

TelecommunicationsAs a telecommunications lawyer, Mr. Davis represents clients both in the federal courts and before the FCC. His practice has touched on a wide variety of issues, including special access, network neutrality, local number portability, wireless roaming, telecommunications relay service, and the regulatory treatment of Voice over Internet Protocol (VoIP). Mr. Davis’ experience includes: Advising companies on compliance with a wide variety of federal telecommunications, privacy, and consumer-protection regulations; assisting companies with developing compliance policies.Drafting comments in a wide variety of rulemakings and other proceedings before the Federal Communications Commission.Representing companies in license-transfer and merger proceedings before the FCC.

Antitrust and Competition PolicyMr. Davis has a particular interest in antitrust issues and has advised clients on the antitrust implications of standard setting, resale price maintenance, vertical integration, tying, and loyalty discounts. Before joining the firm, he was a federal prosecutor with the U.S. Department of Justice, Antitrust Division, where he investigated and prosecuted white-collar criminal antitrust and fraud cases.Mr. Davis graduated summa cum laude from Princeton University with an A.B. in Politics and a Certificate in Political Theory. He graduated with honors from the University of Chicago Law School. Following law school, he clerked for Hon. Diane S. Sykes of the U.S. Court of Appeals for the Seventh Circuit and Chief Judge Mark L. Wolf of the U.S. District Court for the District of Massachusetts.