The U.S. Coast Guard (USCG) oversees approximately 800 waterfront facilities that, among other activities, transfer hazardous liquids between marine vessels and land-based pipelines, tanks or vehicles. These “maritime bulk liquid transfers” increasingly rely on computers to operate valves and pumps, monitor sensors, and perform many other vital safety and security functions. This makes the whole system more vulnerable to cybersecurity issues ranging from malware to human error, and is the reason behind a new voluntary cybersecurity guide for the industry. Maritime bulk liquid transfer processes are part of a complex and sophisticated supply chain of the oil and natural gas industry that brings together various types of organizations and systems. The USCG and industry representatives joined with the National Cybersecurity Center of Excellence (NCCoE), part of the National Institute of Standards and Technology (NIST), to develop a profile to help those organizations assess their cybersecurity risk.