Image of Michael E. Mathisen

Michael E. Mathisen

Partner Emeritus
646 375 3825

Mike is a seasoned tax advisor with more than 30 years of extensive insurance, financial services, and accounting experience. He is a highly respected knowledge leader in the insurance sector, particularly with respect to international tax and financing issues.

Prior to joining the firm, Mike was a principal in an international accounting and advisor firm's insurance tax practice and served as head of the practice for its northeast and mid-atlantic regions. Mike also served as executive vice president and global treasurer of XL Capital, a leading worldwide provider of insurance, reinsurance, and financial products.


  • Admitted to the Bar in Connecticut
  • Admitted to the Bar in New York
  • Admitted to the Bar in Pennsylvania
  • Admitted to the Federal Bar for the Northern District of New York


  • FMS, Philadelphia Chapter
  • New Jersey Bankers Association
  • Pennsylvania Association of Community Bankers
  • Organization of Multinational Insurance Taxation
  • Chester County International Business Council
  • Academy of Notre Dame de Namur, Trustee
  • Seaside Villas Fenwick Island, DE, Board Member


State University of New York at Binghamton
Bachelor of Arts

Albany Law School of Union University
Juris Doctor

Boston University School of Law
Master of Laws, Taxation

Continuing Education

  • Advancement Management Program, Duke University Fuqua School of Business
  • Insurance Institute of the Wharton School of Business