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Mark Colley

Arnold & Porter


Mark Colley chairs Arnold & Porter’s Government Contracts practice and is Past Chair of the American Bar Association Section of Public Contract Law. Although best known for work in the bid protest and false claims act areas, Mark’s practice has encompassed everything from foreign military sales and suspension/debarment issues, to counseling on government ethics and multi-state contracting matters. His clients include diverse and leading government contractors such as Raytheon Company, Computer Sciences Corporation, Booz Allen Hamilton, Anthem, BAE Systems, ManTech and Thales Defense & Security, Inc. Full biography:

United States: Government

Government contracts

Within: Leading lawyers

Mark Colley - Arnold & Porter

Within: Government contracts

Housing around 30 partners in its government contracts group, Arnold & Porter has the depth to represent clients from across all relevant industry sectors. The team successfully defended Raytheon Intelligence, Information and Services against three bid protests brought by Northrop Grumman pertaining to the award of a $1bn contract by the Department of Homeland Security to provide cybersecurity defense services for all civilian Federal government networks; the challenge pertained to alleged organizational conflicts. In another matter, the team defended L3 Technologies against challenges brought by Boeing and Bombardier concerning the award of an Air Force sole source contract in connection with the Compass Call program. Other key clients include Ernst & Young and Dell. The firm is also noted for its strength in False Claims Act (FCA) matters as well as classified projects and investigations, such as acting for former Secretary of State Condoleezza Rice in a State Department Inspector General investigation. Government contract transactions feature prominently in the group’s workload, where it draws upon the wider government contract-specific expertise of members of the firm’s intellectual property, employment and corporate teams to handle such matters. Craig Holman chairs the practice, which includes Charles Blanchard and Ronald Lee, both experts in advising IT service providers on protection requirements and regulatory constraints. Paul Pompeo has expertise in cost and pricing matters. Mark Colley is noted for his experience in FCA claims and bid protests. Kara Daniels, Steven Diamond and Dominique Casimir are also recommended.

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Legal Developments by:
Arnold & Porter

  • The role of arbitrators in EU antitrust law

    In May 2014, it will be ten years since Regulation No 1/2003 entered into force. When the legislator of the European Union adopted this Regulation on 16 December 2002, its main objective was to decentralise the enforcement of the two main provisions of EU antitrust law, Articles 81 and 82 of the Treaty establishing the European Community (now Articles 101 and 102 of the Treaty on the Functioning of the European Union (TFEU)). Where do the arbitrators fit in this picture?

    - Arnold & Porter (UK) LLP

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