EXHIBIT 15 ACCOUNTANTS' ACKNOWLEDGEMENT To the Shareholders and Board of Directors of KSW, Inc.: We hereby acknowledge our awareness of the incorporation by reference of our report dated October 30, 2003, included within the Quarterly Report on Form 10-Q of KSW, Inc. for the quarter ended September 30, 2003, in the following Registration Statements: - - Form S-8 dated February 13, 1997 (File No. 33-21735) - - Form S-8 dated April 16, 1998 (File No. 33-350293) Pursuant to Rule 436(c) under the Securities Act of 1933, such report is not considered a part of a registration statement prepared or certified by an accountant or a report prepared or certified by an accountant within the meaning of Sections 7 and 11 of that Act. MARDEN, HARRISON & KREUTER Certified Public Accounts, P.C. White Plains, New York November 13, 2003 19