David Geronemus

David Geronemus, Esq.

JAMS Mediator, Arbitrator and Referee/Special Master

Case Manager
Christiane Catoe
T: 212-607-2780
F: 212-751-4099
620 Eighth Avenue, 34th Floor, New York, New York 10018


David Geronemus is one of the most respected and sought after dispute resolution professionals. He has been a full-time neutral with JAMS since 1994. A former law clerk to Supreme Court Justice Potter Stewart, Mr. Geronemus has taught negotiation and alternative dispute resolution on an adjunct basis at Yale and Columbia Law Schools.

Mr. Geronemus has settled hundreds of cases, including a wide variety of commercial and securities disputes.

Representative Mediations

  • A case arising out of the failure of a savings and loan holding company involving claims of securities fraud and breach of fiduciary duty
  • A class action against a health maintenance organization arising out of amounts charged to its participants
  • A class action involving claims of securities fraud arising out of a decline in the price of a company that manufactures medical devices
  • A complex, multi-million dollar dispute arising out of the termination of a contract for the sale of cellular phones
  • A dispute about the performance of a contract to install a new computer system
  • A dispute alleging fraud and misrepresentation in connection with the sale of a portfolio of cogeneration plants
  • A dispute alleging unfair competition and theft of trade secrets by a former partner
  • A dispute arising out of the merger of two corporations providing medical services
  • A dispute arising out of the termination of a contract for the production of educational videotapes
  • A dispute between a creditor's committee, the parent of the debtor, and the directors' and officers' of the debtor involving issues of alter ego liability and alleged breaches of fiduciary duty
  • A dispute between a pension fund and a broker arising out of the sale of collateralized mortgage obligations; the case contained allegations under the securities laws and ERISA
  • A dispute between the two principal owners of a manufacturing company over the future course of the business
  • A dispute concerning the termination of a consulting contract to provide services relating to computer hardware and software for the hospitality industry
  • A dispute involving an antitrust class action arising out of the sale of certain medical devices
  • A dispute over the proper interpretation of earnout provisions in an acquisition of a computer software company
  • A multi-party dispute arising out of the acquisition of a television station; the case involved the appropriate division of the proceeds between the selling partners
  • An ERISA case involving alleged breach of duties regarding a health and welfare fund of a bankrupt entity
  • Business libel cases
  • Claims by policyholders and state regulators arising out of the failure of an insurance company
  • Dispute between the owners of a financial services company over the future direction and ownership of the company
  • Dispute between two partners in a real estate partnership concerning the appropriate division of profits and the overall conduct of the business
  • Dispute concerning the retirement benefits for the founder of a group medical practice
  • Dispute involving an action brought by a bankruptcy trustee against the directors and officers of the bankrupt entity and a related company. The case, against approximately 16 defendants, involved claims of fraudulent conveyance, preference, as well as negligence and breach of fiduciary duty.
  • Dispute over valuation of a deceased partner's shares in a law firm; the case had been litigated for over 14 years before being settled in one day of mediation
  • Disputes about finders' fees in connection with a corporate financing
  • Disputes alleging breaches of representations and warranties in acquisition agreements
  • Disputes arising out of Canadian reorganization proceedings, including claims by multiple plaintiffs that they were injured by debtor’s products, two class actions, and insurance coverage issues
  • Disputes arising out of the sale and financing of securitized portfolios of automobile leases, involving securities law, contract claims, and insurance coverage issues
  • Dissolution and division of assets of a family owned corporation
  • Tax refund litigation involving approximately 100 claimants and over one hundred million dollars in refund claims
  • Recognized as Best Lawyers' New York City "Lawyer of the Year" for Mediation, 2022
  • Designated with the highest level ranking (Band 1) in Mediation, Chambers USA America’s Leading Lawyers for Business, 2016-2022
  • Recognized in Who's Who Legal in the practice area of Mediation, 2016-2019
  • Recognized as one of seven most highly regarded individuals in the U.S. of Who’s Who Legal in the practice area of Insurance and Reinsurance, 2015
  • Recognized as a Best Lawyer, ADR Category, Best Lawyers in America, 2007-2022
  • Recognized as a New York Super Lawyer by Law & Politics every year since 2007
  • Registered Mediator, United States Bankruptcy Court for the Southern District of New York

ADR Profiles

  • "David Geronemus," 2018 ADR Champions, The National Law Journal, June, 2018
  • Mediator, JAMS, 1994-present
  • Partner, Donovan, Leisure, Newton & Irvine, Washington, D.C. and New York, 1990-1994
  • Associate and Partner, Rogovin, Huge & Schiller, Washington, D.C., 1984-1989
  • Law Clerk, Supreme Court Justice Potter Stewart, 1983-1984
  • Law Clerk, Chief Judge Collins Seitz, U.S. Court of Appeals, 3rd Circuit, 1982-1983
  • J.D., New York University Law School, 1982 (Senior Articles Editor, N.Y.U. Law Review; N.Y.U. Alumni Association Award; John Norton Pomeroy Prize, the Leonard M. Henkin Prize; Member, Order of the Coif)
  • M.B.A., Columbia University Graduate School of Business, 1980 (Roswell C. McCrea Prize, Beta Gamma Sigma Honor Society)
  • B.A., Wesleyan, 1975




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