Please click on the "Supplier Registration" link above to register to bid on opportunities with Nassau County. Welcome to the Online Vendor Bid Site for suppliers and bidders interested in bidding opportunities for the commodities services and technology contracts.Before you start to fill out the bid form, read the bid carefully. The Nassau County Bid Solicitation Boards are open to all registered vendors. Vendors that have not registered are able to view open solicitation opportunities. Access bids and request for proposals for consultants, service providers, contractors, vendors, and suppliers.