This study aims to design multimedia materials to be used in career counseling and to test their effects on self-efficacy and learning. Multimedia Learning Theory and Cognitive Load Theory were used in the study as a theoretical framework. The students were provided to recognize their personality traits (interests and abilities) and almost 50 professions in the light of Holland's Theory. 68 eighth graders (34 experimental, 34 control) took part in the study. A statistically significant increase in the career decision-making self-efficacy scores was found for the students in the experimental group who received multimedia training. The material evaluation form revealed that the students in the experimental group found the material useful and effective. The learning test results suggested that the content presented in the materials was learned well. Based on these results; the video materials that allow individuals to get to know themselves and their professions more closely can be used as an effective way in the career counseling process.