The Ninth International Conference on Remediation and Management of Contaminated Sediments was conducted January 9-12, 2017, in New Orleans, Louisiana. Like the previous conferences in this series, it was presented and organized by Battelle. The Conference was attended by 1,190 scientists, engineers, regulators, and other environmental professionals representing universities, government site management and regulatory agencies, and R&D and manufacturing firms from more than 20 countries. The technical program encompassed nearly 500 platform and poster presentations and five panel discussions presented in 51 specialized sessions.