Note that for Bid Contracts, in order to submit a bid, you must purchase a bid package from the Department of Public Works Permit Office directly. Mail or hand deliver the bid envelope.Do not fax or email your bid. To access a bid please go to Vendor Portal and click the "Nassau County Procurement". Each bidder must deposit with his bid, security in the amount, form and subject to the conditions provided in the Information for Bidders. A Performance Bond, a separate Labor and Material Payment Bond, and Insurance in a form acceptable to Owner will be required of the successful Bidder.