John Geisler

Operating Partner Emeritus, FP&A & Diligence

John joined Gryphon in 2013 and was responsible for due diligence of potential new portfolio companies and the underwriting and professionalization of the finance and accounting groups, processes, procedures and IT systems of Gryphon portfolio companies. He previously held Chairman or Director roles with ECG Management Consultants, Jensen Hughes, K&N Engineering, Orchid Underwriters, SynteractHCR and Trinity Consultants. John also served on the investment review committee and assisted Gryphon deal teams in evaluating prospective investments.


  • Natural Systems Utilities, Chief Financial Officer
  • Golub Capital, Chief Financial Officer & Chief Administrative Officer, Senior Advisor
  • Acadia Partners, Managing Director and COO
  • Lehman Brothers, CFO Merchant Banking Partnerships
  • JP Morgan Chase, Second Vice President/CFO’s Office 
  • PriceWaterhouseCoopers, Manager


B.A., Accounting, Adelphi University (magna cum laude)
New York State Society of CPAs, Member
American Institute of CPAs, Member


Stranger in a Strange Land by Robert A. Heinlein