The study aims to identify the importance of human resources on-the-job training in knowledge management and revealing the necessary skills and experiences when writing administrative letters to transfer distinguished female employees' tacit knowledge. In addition, it identifies the common mistakes in writing these letters, and coming up with the job competencies that are needed when designing training programs for female administrative staff. It relied on the Delphi approach. The results show that the higher the qualification is, the fewer common errors related to the linguistic aspects, and the higher the qualification is, the greater the desire for performance enhancement. As well, the more the experience, the greater reading skills and learning speed is. The results proved that the study sample agreed on the importance of the skills and competencies to enable them to write administrative letters and perform their work properly, which are in the following order according to the responses of the participants in the study: Accuracy at work, the desire to develop work and improve performance, computer skills, oral and written communication skills, continuous reading, and work organization. The study recommended the participation of these distinguished employees in training programs to transfer their experience to others.