The New York City Department of Environmental Protection (DEP) plays a vital role in protecting public health and advancing environmental stewardship by collecting and treating wastewater and stormwater generated in NYC’s dense, urban environment. As the nation’s largest water and wastewater utility, DEP produces a substantial volume of solids totaling nearly 480,000 wet tons annually. This RFEI is a public solicitation to identify strategies, biosolids treatment technologies, and partners in the biosolids management community to enable the responsible and sustainable management of dewatered solids or biosolids produced at DEP’s Water Resource Recovery Facilities (WRRFs) in alignment with the following DEP goals: 1. Achieve 100% diversion of wastewater solids from landfills by 2030 2. Attain energy neutrality at the WRRFs and agency wide carbon neutrality by 2050 3. Diversify outlets and end uses to mitigate DEP’s operational and management risk.