About John F Mosca, CPA, PC

John Mosca is a South Carolina and New York State Certified Public Account. John graduated from CW Post Long Island University School of Professional Accountancy in 1978. He started his career with Seidel, Kessler & Blum & Co in Great Neck NY. John became a partner in the firm in 1986. In 1996, the firm merged with Marks Shron & Company, LLC. At that time, the new firm included 18 partners and 150 employees with offices in Great Neck NY and New York City NY. In 1998, John left the partnership to start his own accounting firm, specializing in taxation for individuals and small businesses. John has been a member of the Okatie Rotary Club for the past 13 years where he serviced at the club’s treasurer and is a three-time past president. Currently John is a board member of The Foundation for Educational Excellence.


  • Individual Income Taxes
  • Corporate Tax Returns
  • Amended and Multi-state Taxation
  • Offer in Compromise
  • Accounting, Bookkeeping & Payroll Services