Perusahaan yang sudah mengikuti Training di Primaxindo Training Centre adalah:
- PT.Pertamina EP
- PT.Pertamina UP
- Medco E & P
- Beraucoal
- PT. Vico Indonesia
- PT. Chevron Geothermal
- PT. Chevron Indonesia Company
- PT. Chevron Pacific Indonesia
- CNOOC SES Ltd
- PT.Pupuk Kaltim
- PT.Pupuk Sriwijaya
- PT.Semen Gresik
- PT. Petrokimia Gesik
- PT. Swabina Gatra Gresik
- PT.United Tractor Semen Gresik ( UTSG )
- JOB.Pertamina – Petrocina
- PT.Tambang Batu Bara Bukit Asam
- PT.Krakatau Stell
- PT.Kaltim Parna Industri
- PT. Kaltim Pasifik Amoniak
- PT. Total E & P Indonesie
- PT. Tiarabumi Petroleum
- PT. Semen Padang
- PT.Semen Tonasa
- PT.Indominco Mandiri
- Rumah Sakit PKT
- Conoco Philip
- Indonesia Power
- Bank Rakyat Indonesia