Company Profile

    Company overview

    Company size

    11-50
    STM Group is comprised of 5 companies. PT. STM Tunggal Jaya is the holding company which has 30 ~ 100% of shares of 5 subsidiaries including 2 coal mining concessions (AMNK dan CEM).

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    Recent reviews

    3.0
    Senior Mining Supervisor
    Nov 2025
    Malinau North Kalimantan2 to 3 years in the role, former employee
    Dengan kondisi site yang sangat jauh dan rooster panjang membuat kita sangat jenuh
    The good thingsOrang lokal yang sangat wellcome dengan pendatang
    The challengesTidak ada development karyawan, makanan tidak bergizi, site sangat jauh, jaringan seluler tidak ada dan dihuni banyak orang korea yang skeptis
    Ratings for Atha Marth Naha Kramo are shared as-is from employees in line with our community guidelines
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