Mark S. Butler

Mark S. Butler

Of Counsel

Mr. Butler is a graduate of Holy Cross College (AB History), Fordham Law School (J.D.) and the NYU Graduate School of Business(Advanced Professional Certificate in Finance). After four years as an associate in the corporate and banking groups of the New York City law firm of Shearman&Sterling, he joined the Legal Division of Warner Lambert Company, a large multi-national conglomerate, as a corporate attorney and rose to Vice President and Associate General Counsel and member of the Executive Committee of the Consumer Products Group. His responsibilities at that company included supervision of general corporate, securities and contractual issues as well as acquisition, divestiture and licensing matters. He left Warner Lambert to become a founding member and Executive Vice President, Chief Administrative Officer and General Counsel of Indevus Pharmaceuticals, Inc., a start-up specialty pharmaceuticals company which became a publicly traded company with more than 250 employees. His legal responsibilites at Indevus included general corporate and contractual issues ,licensing, intellectual property matters and the supervision of litigation matters. After managing the sale of the company in 2009, Mr. Butler started Marnex Advisors LLC to advise clients on a variety of contractual, corporate, trust and estate and real estate matters.

Areas of Practice

  • 50% General Corporate Matters
  • 25% Real Estate Matters
  • 25% Trust &Estates Matters

Bar Admissions

  • New York, 1975


  • Fordham University School of Law, New York, New York
    • J.D.
  • Holy Cross College, Worcester, Massachusetts
    • B.A. - 1968
    • Major: History
  • New York University Graduate School of Business, New York, New York
    • Advanced Professional Certificate in Finance

Professional Associations and Memberships

  • New York State Bar Association, Member
  • Suffolk County Bar Association, Member
  • East Hampton Village Planning Board, Member

Past Employment Positions

  • Marnex Advisors LLC, Partner, 2010 - 2016
  • Indevus Pharmaceuticals Inc., EVP, CAO and General Counsel, 1994 - 2009
  • Warner-Lambert Company, Morris Plains, NJ, 1979 - 1993
  • Shearman & Sterling, Corporate Associate, 1975 - 1979

Pro Bono Activities

  • Volunteer Mediator, Community Dispute Resolution Centers (small claims mediation)

Ancillary Businesses

  • Real Estate Broker