Data analysis, management, and governance are critical elements of insider threat (InT) programs. To strengthen the InT community’s ability to improve their prevention and response efforts, the Threat Lab developed the Data Analysis Plan for the Insider Threat Community: A Collaborative Workbook (henceforth, “Workbook”), an instructional guide for use by InT analysts. The research team conducted stakeholder meetings and semi-structured interviews to identify opportunities to enhance data analysis efforts across InT programs. This resulted in an operationally relevant workbook with supplemental material to enable end-users to conduct analyses and interpret results.