About Daniel

Daniel Castellano is a partner in Marcum’s Accounting Services Group, specializing in strategic planning and tax planning for closely-held construction companies and their executives. He also possesses practical experience in surety and banking enhancement, mergers and acquisitions and financial negotiations.

Mr. Castellano has authored numerous articles and is a frequent lecturer of construction accounting and taxation to bonding companies and banks.

Actively involved in the community, Mr. Castellano is a proud supporter of organizations including the Cooley’s Anemia Foundation, Suffolk Chapter; Contractors for Kids; Sunrise Day Camp; Long Island Cares; and Long Island Alzheimer’s Foundation.

Mr. Castellano came to Marcum after the Firm joined forces with Castellano, Korenberg & Company in 2020.

Professional & Civic Affiliations

  • American Institute of Certified Public Accountants (AICPA)
  • New York State Society of Certified Public Accountants (NYSSCPA), Nassau Chapter
  • General Contractors Association
  • Long Island Contractors Association
  • Mechanical Contractors Association
  • New York City Surety Association
  • Risk Management Association, Board of Directors
  • Subcontractors Trade Association
  • The Columbus Citizens Foundation
  • Association of Wall Ceiling Carpentry Industries of NY
Practice Focus

Strategic Planning
Tax Planning
Bonding Enhancement

Industry Focus

Real Estate


Bachelor of Business Administration
Iona College