Abstract: This study aimed to search for methods of assessing the development of competency of personnel working in an organization. Numerous methods were deliberated and 8 were selected and submitted to experts for their consideration. Accompanying the submission of the 8 methods was a series of 8 support instruments that included questionnaires and observation forms which the experts were invited to comment on and improve where necessary. Following the expert’s analysis, the instruments were evaluated in a trial session. The 8 methods for assessing the development of competency of personnel working in an organization are: a self-competency assessment at the beginning and end of a related developing competency program. An appraisal by the personnel’s superiors showing any increase in competency. An assessment by the personnel’s work peers showing any increase in competency. An assessment by the personnel’s subordinates showing any increase in competency. The mentor must give an appraisal of the personnel in the group. A graphic review and day by day assessment of the program by development receivers. An assessment of the levels of satisfaction with the program by participating personnel. An assessment on the levels of success of the program by participating personnel. As for the results of implementing all the 8 methods of assessment of competency, it was found that these methods could efficiently assess the developing of competency of personnel in an organization.