Chuck Mattern


As a relationship partner, I have always strived to help my clients, whether it’s tax related for their business or for them personally. That’s where the satisfaction comes in.

Chuck Mattern is a Partner at PKF O’Connor Davies with over 36 years of experience in accounting, auditing and taxation. He developed a niche in construction and real estate, real property holding, and not-for-profit accounting, auditing and taxation. In addition, he also assists with planning, management advisory services and tax needs for manufacturing, software engineering companies, professional services firms and other closely held companies.

Chuck has broad-based experience in auditing, accounting and taxation, and provides business advisory services, business succession planning, and consulting to high net-worth individuals regarding wealth management services.  He is also responsible for quality control policies and procedures.

Chuck is a past Chairperson of the Real Estate/Construction Contractors Committee for the Suffolk Chapter of the New York State Society of Certified Public Accountants and belongs to not-for-profit community organizations. He is a registered representative who has passed the FINRA Series 7 and NASAA Series 66 exams.  He also holds a New York State Life and Health Insurance license.

Professional Affiliations & Civic Involvement

  • American Institute of Certified Public Accountants (AICPA)
  • New York State Society of Certified Public Accountants (NYSSCPA)


  • Certified Public Accountant (New York)