This document outlines a request for proposals from consultants to provide supervision and mentoring services for the Water Supply and Sanitation Infrastructure Improvement Program in Guyana. The objective of the program is to improve water supply, reduce non-revenue water, and improve access to sanitation. The scope of services for consultants includes supervising construction of new water treatment plants, rehabilitation of existing plants, developing standard operating procedures, and training Guyanese staff. Proposals are due by July 21, 2015 and consulting services are expected to commence in October 2015, lasting 42 months. Evaluation criteria emphasize relevant experience, methodology, staff qualifications, knowledge transfer, and national participation.