Selecting employees that act with integrity is paramount for organizations such as the Canadian Armed Forces (CAF) where integrity-related behaviour can impact national security. Currently, the Military Police, an occupation within the CAF, utilize a high-cost, time consuming Integrity Assessment Centre (IAC); however, personality assessment tools have the potential to be a less resource intensive way to predict integrity behaviour. The primary goal of this thesis was to examine whether facets of disinhibition, a relatively unexplored maladaptive trait, could add incremental variance above facets of conscientiousness in predicting integrity among Military Police applicants (n = 151) attending an IAC. Hierarchical linear models were conducted using a self-report assessment of integrity, and the IAC results, as outcomes. Disinhibition added incremental variance in the prediction of the IAC integrity scores but not the self-report assessment which indicates that including maladaptive facets of personality has value when predicting behavioural assessments of integrity.