The United Nations Interim Security Force for Abyei (UNISFA) is seeking qualified and experienced companies for the design and building of Conventional Activated Sludge Wastewater Treatment Plants for UNISFA in Abyei. NOTE: 1. Submission of the EOI does not constitute an obligation by the United Nations to include your company in this specific procurement exercise, neither does it assure that a respective bidding exercise will be undertaken in due course. 2. Vendors currently registered at basic level must proceed to submit requirements for level 1 & level 2 registration. 3. To be awarded a contract, the Bidder must be registered with the UN Secretariat through the United Nations Global Marketplace (UNGM).