| Company Name | Designation | Appointed on | DSC | Status |
|---|---|---|---|---|
| JOHN OIL AND GAS LTD | Director | 01 Nov, 1994 | Expired | Active |
| JOHN ENGINEERING PRIVATE LIMITED | Director | 05 Jul, 2007 | Expired | Active |
| JOHN ENERGY LIMITED | Whole-time Director | - | Expired | Active |
| JOHN DRILLING SERVICES PRIVATE LIMITED | Director | 11 May, 2011 | Expired | Active |
| AHMEDABAD INSTITUTE OF DRILLING TECHNOLOGY | Director | 02 Feb, 2015 | - | Active |
| SYNERGY DRILLING FLUIDS PRIVATE LIMITED | Director | 16 Jul, 2010 | - | Active |
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