SUPPLEMENTAL NOTICEREQUEST FOR PROPOSALSRFP No. PW-S35121-06M The Nassau County Department of Public Works intends to issue a Request for Proposals (RFP) for services regarding the following project: NASSAU COUNTY DEPARTMENT OF PUBLIC WORKSSouth Shore WRF-Aeration Blower Facility The Department of Public Works is requesting proposals from qualified firms to provide construction management services. These services may include but not be limited to resident engineering, office engineering, inspection, CPM scheduling services and cost estimating. The Construction Manager’s duties are defined in the “Scope of Services” section of the RFP. Technical and cost proposals regarding this project are due at or before 3:00 PM Tuesday, February 17th, 2026 at the location indicated within the RFP. Please note that this notice is not the Request for Proposals. An actual copy of the RFP may be obtained on the Nassau County website: https://apps.nassaucountyny.gov/eProc/index.php. Vendors doing business with Nassau County, including those responding to this solicitation, must register with the County. Vendors may register at https://www.nassaucountyny.gov/3153/e-Services by clicking the “Vendor Portal Registration”. In addition, any vendor submitting an offer for this solicitation should submit the required vendor disclosures in the Vendor Portal aswell. Proposals should only be submitted after careful examination of the completed RFP and its requirements. The firm selected for this work will be required to provide proof of general and professional liability insurance in the minimum amounts of $2,000,000 and $4,000,000 per occurrence, respectively. The successful Proposer shall be required to comply with the requirements of Local Law No. 14-2002, “Participation by Minority Group Members and Women in Nassau County Contracts,” and 2-2016, “Participation of Service-Disabled Veterans in County Contracts.” All Proposers should review the provisions of Appendix EE (included as an attachment to the RFP) which outlines the requirements of Local Law No. 14-2002. Technical proposals shall include information regarding the Proposer’s plan tocomply with Local Law No. 14-2002. All phases of this project (engineering services and construction) are eligible for financing through the New York State Environmental Facilities Corporation (NYSEFC). Proposers should carefully review the “NY State Revolving Fund Bid Packet for Non-Construction Contracts and Service Providers” which is included as part of the RFP. Among other requirements, the successful Firm shall make documented “good faith efforts” to achieve 15% Minority Business Enterprises (MBE) and/or Women’s BusinessEnterprises (WBE) participation, and 6% minimum good faith efforts for the participation of Service Disable Veteran-Owned Businesses (SDVOB) in the performance of the work. Additional requirements may be needed for compliance with other funding sources that the County is pursuing. Any questions regarding this RFP should be submitted via email prior to 4 PM, February 3, 2026 to Mr. Chris Vella at cvella@nassaucountyny.gov. Dated: January 28, 2026 By: Michael Kwaschyn, P.E.Commissioner Public Works Business enterprises awarded an identical or substantially similar procurement contract within the past five years: LiRo Program and Construction Management, PE, P.C. LiRo Engineers, Inc. Gannett Fleming Engineers & Architects Lockwood Kessler & Bartlett, Inc. de Bruin Engineering, PC URS Corporation - New York CH2M HILL Engineering, P.A. Jacobs Project Management Co. Hazen and Sawyer IMEG Consultants Corp. Service-Disabled Veteran-Owned Business (SDVOB) SDVOB Goal: 6.00% Minority / Women Business Enterprise contracting goals (MWBE) Total MWBE Goals: 15.00%