This report introduces the WorkFORCE Assessment for Job Fit, a personality assessment utilizing the FACETS core capability, which is based on innovations in forced-choice assessment and computer adaptive testing. The instrument is derived from the five-factor model (FFM) of personality and encompasses a broad spectrum of personality assessment. This document provides an overview of the assessment, beginning with detailing evidence-based practices for personality measurement and modeling its relationship to workplace outcomes. We address the validity and fairness of this assessment, the creation of composite scores, and the generalizability of the assessment across languages and job types. We conclude with recommendations on the use of this capability for workforce applications and guidelines for future research.