This article describes an innovative approach to address the crucial issue of career choice among senior high school students. Grounded in the life design career guidance framework, the authors mitigate the prevalent problem of students selecting inappropriate majors upon entering tertiary institutions. Employing a positivist research paradigm and a quantitative approach, the study uses a quasiexperimental design with a non-equivalent pre-posttest control group method. Tenth-grade students of a senior high school were selected through purposive sampling. The career choice instrument, analyzed using the non-parametric statistical Mann-Whitney U test, forms the methodology. The results reveal the practicality of life design career guidance, with a two-tailed significance value of 0.001 in the experimental class test, indicating its efficacy in developing students' career choices. The authors illustrate the proposed life design career guidance method, showcasing its practical application to high school students. The method leads to a noteworthy improvement, as evidenced by a significant increase in the significance value in the experimental class test. This underscores the method's effectiveness and contributes to the existing knowledge in career guidance. In conclusion, this research provides a novel and effective alternative in the form of life design career guidance for improving decision-making processes among high school students. The findings contribute to the ongoing discourse on evidencebased career guidance strategies, offering valuable insights for educators, counselors, and policymakers seeking innovative solutions to enhance career development services in educational institutions.