The purpose of this study was to examine the level of depression faced by bullying staff before and after the counselling session and also identify the symptoms of depression. By using single case study based on a purposive sampling method, the combination from quantitative and qualitative methods were performed in this study using the Beck Depression Inventory (BDI II), Mental Health Screening Status Form (MSE) and verbatim based on counselling process. Four screening tests were performed to client which is pre-session testing, post-test after the second session, post-test after the fourth session and third post-test after the sixth session. Six sessions were conducted against the client during the review period and BDI II screening tests are used to identify depression levels after undergoing counselling sessions. The purposed to use MSE for this process is to see the changes that are happening to the client, especially in relation to physical and personal appearance. The verbatim method used in this study is to identify the depression symptoms faced by the client. The triangulation method is used to look at the effects of the technique of dialogue in order to reduce depression which is through the combination of BDI II, MSE and verbatim analysis methods. The findings of the study found that the dialogue can reduce depression and this is evidenced by the analysis of triangulation methods in this study.