The U.S. Embassy in Gabon seeks a contractor for preventive maintenance of its wastewater collection and treatment system in Libreville. The anticipated performance period is for a base year with four one-year option periods and a potential six-month extension. The contract will be firm fixed-price with economic price adjustment. All contractors must be registered in SAM.gov at the time of quote submission, and offers must be submitted electronically with technical and financial quotes in separate files. The place of performance is the U.S. Embassy in Libreville, Gabon.