Michael M. Mannix is an attorney in Holland & Knight's Tysons office. He represents clients in information technology (IT), software, engineering, telecommunications, electronics, defense products, medical devices and other industries of which many are government contractors.

Mr. Mannix represents public and private companies, and his practice emphasizes mergers, acquisitions and divestitures, securities offerings, as well as technology transactions. His seasoned approach to problem solving results in efficient delivery of legal assistance and permits seamless integration of other practice areas, including: Hart-Scott-Rodino Antitrust Improvements Act (HSR) and antitrust, government contracts, intellectual property, tax, employee benefits, environmental, litigation and real property.

Mr. Mannix has represented acquirors and targets in a large number of mergers, acquisitions, leveraged buyouts and joint ventures. He is regularly involved in all phases of these transactions, including initial planning, structuring, negotiation and closing.

Mr. Mannix also counsels clients on a broad range of other corporate, securities and business related matters, including director's duties and responsibilities as well as other aspects of corporate governance, disclosure issues, corporate compliance matters and corporate finance transactions.

Mr. Mannix has been a frequent lecturer on matters involving mergers, acquisitions and divestitures, corporate law and legal ethics, and regularly speaks to industry groups in government contracting and other technology industries.

Listing of Representative Transactions in these Select Industries:

  • Government Contracting: Multiple acquisitions, divestitures and other sales in IT, healthcare, cyber, C4ISR and data analytics, including representation of CSRA on certain aspects of the $9.6 billion sale to General Dynamics Information Technology (GDIT), of SOS International Ltd. in the acquisition of STG Group Holdings Inc., and of MAXIMUS Inc. in the acquisition of $400 million of assets from GDIT, and numerous other engagements for Computer Sciences Corporation, CSRA, CACI and SOS International Ltd., as well as the reverse triangular merger that created Argon ST
  • Life Sciences: Multiple acquisitions and divestitures including purchase of healthcare consulting companies and the $260 million divestiture of a division of a medical device company to Ecolab
  • Transportation: $280 million of private offerings and a $450 million 144A offering in convertible notes for IdleAire Technologies
  • Telecommunications: Early stage financing and initial public offering (IPO) services for Advanced Switching Communications, a telecom hardware manufacturer; Multiple rounds of private financings and sale of Vinci Systems, an optical networking terminals (ONT) company, to Tellabs
  • Real Estate and Construction: Representation of management in the purchase of construction and other divisions from The St. Joe Company in a management buy-out (MBO), and of Lehigh Hanson in the $150 million purchase of assets of the Pacific Northwest operation of Cemex


  • George Mason University School of Law, J.D.
  • Lafayette College, B.A.
  • The George Washington University, MBA
Bar Admissions/Licenses
  • Virginia
Honors & Awards


Speaking Engagements