Preventive maintenance services for wastewater treatment and collection systems are required at the main compound of the U.S. Embassy, Addis Ababa, Ethiopia. The Contractor shall provide the following services: Site Assessment and Survey – Conduct thorough evaluations of existing wastewater systems and infrastructure. Project Management – Oversee all phases of the maintenance contract to ensure timely and efficient execution. Professional Wastewater Treatment Services – Deliver expert-level treatment operations in accordance with applicable standards. Logistics and Material Procurement – Manage the sourcing and supply of all necessary materials and equipment. Preventive Maintenance and Testing – Perform scheduled maintenance and system testing to ensure optimal performance and compliance. Cost Estimating and Scheduling – Develop accurate cost projections and maintain a reliable project schedule. General Support Services – Provide additional operational support as required under this contract.