Abstrak Program Kuliah Kerja Nyata di PT. Karunia Armada Indonesia, Kecamatan Tabang, Kabupaten Kutai Kartanegara, dilaksanakan untuk meningkatkan kesadaran dan kepatuhan karyawan terhadap aspek keselamatan dan kesehatan kerja. Kegiatan dilakukan melalui sosialisasi K3LH dan pendampingan praktik penerapan Lock Out Tag Out (LOTO) di area workshop. Metode pelaksanaan meliputi pelatihan interaktif, demonstrasi penggunaan APD, dan observasi perilaku keselamatan sebelum dan sesudah kegiatan. Program diikuti oleh 22 karyawan, dengan 14 orang diantaranya mengikuti pendampingan praktik LOTO secara langsung. Hasil evaluasi menunjukkan peningkatan kepatuhan penggunaan APD dari sekitar 60% menjadi 85%, serta peningkatan penerapan prosedur LOTO dari 30% menjadi 70% pada aktivitas perawatan alat. Perubahan ini mengindikasikan bahwa program KKN efektif dalam memperkuat pemahaman dan budaya keselamatan kerja karyawan, serta berkontribusi terhadap penerapan standar K3LH yang lebih konsisten di lingkungan industri. Kata kunci: Kuliah Kerja Nyata; K3LH; LOTO; keselamatan kerja; pengabdian masyarakat. AbstractThe Community Service Program (Kuliah Kerja Nyata—KKN) conducted at PT. Karunia Armada Indonesia, located in Tabang District, Kutai Kartanegara Regency, aimed to enhance workers’ awareness and compliance with occupational health and safety practices. The program was implemented through K3LH (Occupational Health, Safety, and Environment) socialization and hands-on mentoring on the application of Lock Out Tag Out (LOTO) procedures in the workshop area. The activities involved interactive training sessions, demonstrations of proper personal protective equipment (PPE) usage, and observational assessments conducted before and after the intervention. A total of 22 employees participated in the program, with 14 individuals taking part in direct LOTO practice mentoring. The evaluation results indicated an increase in PPE compliance from approximately 60% to 85%, as well as an improvement in LOTO implementation from 30% to 70% across maintenance activities. These findings demonstrate that the KKN program effectively strengthened workers’ understanding and safety culture, contributing to more consistent adherence to K3LH standards within the industrial environment. Keywords: community service program; K3LH; LOTO; workplace safety; industrial engagement.