DHS Field Engagement Accountability Act This bill requires the Department of Homeland Security (DHS) to develop and update at least once every five years a strategy for DHS engagement with fusion centers. The term "fusion center" means a collaborative effort of two or more government agencies that combines resources, expertise, or information to maximize the ability of such agencies to detect, prevent, investigate, apprehend, and respond to criminal or terrorist activity. The Office of Intelligence and Analysis of DHS shall provide personnel and support to fusion centers, publish performance metrics for DHS field personnel assigned to fusion centers, and develop and implement training for fusion center personnel. DHS intelligence and information components shall develop policies and metrics to ensure effective use of the unclassified Homeland Security Information Sharing Network and shall assess and implement enhancements to improve such network.