| LEAHY, Michael ACTIVE | Director | 05 Jan 2016 | | Scotland | November 1964 | Scientific Drilling Controls Limited, Wellheads Crescent, Wellheads Industrial Estate, Aberdeen, AB21 7GA, Scotland |
| SHEWAN, Michael Roy ACTIVE | Director | 06 Jan 2016 | | Scotland | July 1970 | Scientific Drilling, Wellheads Crescent, Wellheads Industrial Estate, Aberdeen, AB21 7GA, Scotland |
| CARTER, Daniel Roland RESIGNED | Secretary | 24 May 2012 | 07 Jan 2016 | | | Corporate Headquarters, 16701 Greenspoint Park Drive, Suite 200, Houston, Texas, 77060, Usa |
| LEAHY, Michael RESIGNED | Secretary | 24 May 2012 | 06 Jan 2016 | | | 20-22 Bedford Row, London, WC1R 4JS |
| MACRAE, Alasdair RESIGNED | Secretary | | 31 Mar 1998 | | | 36 Fountainhall Road, Aberdeen, Aberdeenshire, AB15 4DT |
| MACRAE, Sophie Louise RESIGNED | Secretary | 05 Jan 2016 | 05 Jan 2016 | | | Scientific Drilling Controls Limited, Wellheads Crescent, Wellheads Industrial Estate, Aberdeen, AB21 7GA, Scotland |
| MOIR, George RESIGNED | Secretary | 01 Aug 2009 | 24 May 2012 | | | Lower Cothal Mill, Fintray, Aberdeen, Aberdeenshire, AB21 0HU, Uk |
| THOMSON, Gordon Watt RESIGNED | Secretary | | 01 Aug 2009 | | | 14 Pine Island Place, The Woodlands, Texas, 77382, Usa |
| VAN STEENWYK, Elizabeth Anne RESIGNED | Secretary | | 24 May 2012 | | | 3025, Buena Vista, Paso Robles, California 93446, Usa |
| ARMSTRONG, Dana Anne RESIGNED | Director | 09 May 2016 | 24 Apr 2020 | United States | June 1971 | Scientific Drilling Controls Limited, Wellheads Crescent, Wellheads Industrial Estate, Aberdeen, AB21 7GA, Scotland |
| CARTER, Daniel Roland RESIGNED | Director | 06 Jan 2016 | 19 Mar 2026 | United States | August 1956 | 110 Rankin Road, Scientific Drilling International, Inc., 110 Rankin Road, Houston, Texas Tx 77073, TX77073, United States |
| DUROCHER, Gene H RESIGNED | Director | 07 Dec 2009 | 24 May 2012 | Usa | February 1937 | 20-22 Bedford Row, London, WC1R 4JS |
| MOIR, George RESIGNED | Director | 24 May 2012 | 06 Aug 2014 | United Arab Emirates | May 1954 | #2, 1207 Jumeirah Business Centre 2, Jumeirah Lakes Towers, Dubai, United Arab Emirates |
| THOMSON, Gordon Watt RESIGNED | Director | 29 Sep 2014 | 30 Dec 2015 | Scotland | October 1958 | Scientific Drilling Controls Ltd., Wellheads Crescent, Wellheads Industrial Estate, Aberdeen, AB21 7GA, Scotland |
| VAN STEENWYK, Brett H RESIGNED | Director | 01 Aug 2009 | 28 Jan 2011 | Usa | February 1958 | 3025, Buena Vista, Paso Robles, California, 93446, Usa |
| VAN STEENWYK, Donald Hubert RESIGNED | Director | | 07 Dec 2009 | | June 1926 | 3025, Buena Vista, Paso Robles, California 93446, Usa |
| VAN STEENWYK, Elizabeth Anne RESIGNED | Director | | 24 May 2012 | United States | July 1926 | 3025, Buena Vista, Paso Robles, California 93446, Usa |
| VAN STEENWYK, Kedrin RESIGNED | Director | 01 Aug 2009 | 24 May 2012 | Usa | November 1953 | 10571, Falls Creek Lane, Centreville, Ohio, 45458, Usa |
| VAN STEENWYK, Matthew Donald RESIGNED | Director | | 30 Jun 1993 | | March 1956 | 2450 Mission Street, San Marino, California 91108, Usa |
| WADE, William Benjamin RESIGNED | Director | 28 Jul 2010 | 31 Aug 2014 | Usa | November 1942 | Chq, 16701 Greenspoint Park Drive, Suite 200, Houston, Texas, 77060, Usa |
| WATSON, Scott Michael RESIGNED | Director | 24 May 2012 | 29 Sep 2014 | United States | August 1968 | Chq, 16701 Greenspoint Park Drive, Suite 200, Houston, Texas, 77060, Usa |