Mark E. Williams

Mark E. Williams

Attorney at Law

Professional Experience:

Mark E. Williams is a member of Clark Partington’s tax practice group. As an attorney with over 30 years of experience, Mark works closely with domestic and international businesses and individuals to address tax, transactional, and estate planning matters. He frequently addresses matters for small and middle market businesses and their owners, including strategic formations, joint ventures, operational management, capital and debt restructuring, and sophisticated exit and legacy planning strategies. Mark’s comprehensive knowledge in key industry sectors enables him to anticipate and identify issues related to business supply chains, asset allocation, valuation, private wealth management, investment banking, and structured financial products.

Mark’s notable work includes rendering legal advice to a Florida-based company and its founders during the startup phase ($2 million capitalization). Guiding the company through numerous private equity rounds to a public offering, his counsel resulted in the company obtaining $600 million in net exit proceeds to the founders. Mark advised the company on federal and state tax mitigation, as well as legal strategies regarding operational planning (qualified and non-qualified deferred compensation, acquisition roll-ups, dispositions and spin-offs of property and divisions, intellectual property, employment agreements, buy-sell agreements, and regulatory matters); exit planning (tax deferral, capital structure planning, and restrictive covenant planning); and legacy planning (estate tax mitigation utilizing sophisticated trusts and other wealth preservation vehicles).

Mark’s experience also includes counsel to numerous technology-based companies regarding legal and tax strategies associated with the development of different forms of intellectual property and legal ownership positioning within the supply chain for both operational and exit purposes. He has also advised a group of middle market pharmaceutical companies regarding operational restructuring for purposes of attracting potential buyers, transactional exit strategies, and legacy planning. Most recently, Mark restructured the legal operations of a large for-profit organization and various associated foundations due to self-dealing, private inurement, and private benefit issues, subsequently integrating the foundations into revised estate plans.

Mark earned his Bachelor of Business Administration (BBA) degree, magna cum laude, from the University of Notre Dame in 1985, his Juris Doctor degree, from the University of Illinois Law School in 1988, and his LL.M. in taxation from DePaul University in 1991. He served as an adjunct professor at the University of Miami’s L.L.M program and is licensed to practice law in Florida and New York.

Mark E. Williams

Attorney at Law




Email Address:

Areas of Practice
  • Business Transactions
  • Business Formation
  • Healthcare Law
  • Mergers & Acquisitions
    • Acquisitions, & Asset Sales
    • Liquidations and Reorganizations
  • Taxation
    • Planning
    • Administrative Controversies
    • Tax Litigation
  • Wills, Trusts & Estates
    • Probate & Trust Litigation
    • Trusts & Estate Planning & Administration


  • L.L.M., Taxation, DePaul University, Chicago
  • J.D., University of Illinois Law School, Urbana-Champaign
  • B.B.A., Accounting, University of Notre Dame, Magna Cum Laude


Admittance to Practice
  • Florida Bar
  • New York Bar

Additional Legal Resources