To access Bid Contract solicitations and Request for Proposal documents to download and view for free, click on the "Vendor Portal" link. All construction contracts must specify the term, contract amount and clearly identify the scope of work.Nassau County Department of Public Works is requesting proposals from firms to provide Construction. On Wednesday, July 10, 2024. Each. BID shall consist of one (1) original and three (3) copies of the RFP Package which shall include all required documents and any supplemental information. Bids together with Bid Security will be accepted in the office of the Purchasing Dept. , Nassau University Medical Center, 2201 Hempstead.