| David Constable | President & CEO, South Africa | 2011 | 2016 |
| Matthew Long | Process Engineer | 2012 | 2013 |
| Ross Weaver | Technical Assistant (London) | 2011 | 2012 |
| Johan Brand | Business Manager, Underground Coal Gasification | 2007 | 2009 |
| Jan de Jager | Regional Chief Financial Officer | 2000 | 2008 |
| Cobus Malherbe | Senior Process Engineer | 1998 | 2007 |
| Kalien Selby | Manager, Market & Technical Service (South Africa) | 1999 | 2007 |
| Johan Brand | Mining & Engineering Manager, UCG Business Analyst | 2003 | 2007 |
| Johan Brand | Mine Engineer, Maintenance Manager | 1996 | 2001 |
