| GODWIN, Andrew Peter ACTIVE | Director | 04 Nov 2013 | | United Kingdom | August 1965 | PO BOX 29, The Pensnett Estate, Kingswinford, West Midlands, DY6 7NP, United Kingdom |
| LASK, Thomas Ludwig, Dr ACTIVE | Director | 18 Dec 2015 | | Germany | January 1957 | 36, Universitatsstrasse, Erlangen 91054, Germany |
| BONIME, Jonathan David RESIGNED | Secretary | 31 Oct 1998 | 18 Jan 2001 | | | 240 Trotwood Drive, Upper St Claire Pennsylvania 15241, Usa, FOREIGN |
| DAVIS, Elliot Staub RESIGNED | Secretary | 20 Oct 2008 | 04 Nov 2013 | | | 1000, Six Ppg Placehoodridge Drive, Pittsburgh, Pa 15222, Usa |
| GLASSON, Peter RESIGNED | Secretary | | 27 Mar 1997 | | | Danes Lye, Westbury Road, Bratton, Westbury, Wiltshire, BA13 4TB |
| RUSSELL, Lewis Michael RESIGNED | Secretary | 29 Dec 1995 | 27 Mar 1997 | | | 833 So Rimpau Blvd, Los Angeles, California, 90005, Usa |
| TISHOK, John Michael RESIGNED | Secretary | 18 Jan 2001 | 01 Apr 2008 | | | 1 Sunedecker Road, Amity, Pa 15311, United States |
| VICCARO, Patrick RESIGNED | Secretary | 27 Mar 1997 | 31 Oct 1998 | | | 1000 Six Ppg Place, Pittsburgh 15222-5479, Pennsylvania Usa, FOREIGN |
| GRAVITAS COMPANY SECRETARIAL SERVICES LIMITED RESIGNED | Secretary | 01 Apr 2008 | 04 Nov 2013 | | | One, New Change, London, EC4M 9AF |
| REED SMITH CORPORATE SERVICES LIMITED RESIGNED | Secretary | 04 Nov 2013 | 31 Mar 2016 | | | The Broadgate Tower, Third Floor, 20 Primrose Street, London, EC2A 2RS, United Kingdom |
| BAILLIE, James H RESIGNED | Director | 29 Dec 1995 | 25 Mar 1996 | | December 1946 | Hagenauer Strabe 42, Wiesbaden 65203, Germany, FOREIGN |
| BENSON, Richard RESIGNED | Director | | 29 Dec 1995 | | | Stockadon Farm, Cheriton Fitzpaine, Crediton, Devon, EX17 4JU |
| COOPER, Anthony Rupert Valentine RESIGNED | Director | 01 Mar 1994 | 29 Dec 1995 | | May 1937 | Edington Priory, Edington, Westbury, Wiltshire, BA13 4QR |
| DAVIS, Elliot Staub RESIGNED | Director | 01 May 2011 | 04 Nov 2013 | United States | August 1961 | 1000, Six Ppg Place, Pittsburgh, Pa 15222, Usa |
| DECOURCY, Patrick RESIGNED | Director | 15 Jul 2013 | 04 Nov 2013 | United States | October 1962 | 1000, Six Ppg Place, Pittsburgh, PA 15222, Usa |
| GLASSON, Peter RESIGNED | Director | | 29 Dec 1995 | United Kingdom | June 1939 | Danes Lye, Westbury Road, Bratton, Westbury, Wiltshire, BA13 4TB |
| GONESETH, Denis RESIGNED | Director | | 14 May 1993 | | October 1942 | Nyon, Ch 1226, FOREIGN, Switzerland |
| GONSETH, Denis RESIGNED | Director | 28 Jun 1993 | 27 Dec 1995 | | October 1942 | Nyon Ch 1225, Switzerland, FOREIGN |
| GRUNSKY, Manfred RESIGNED | Director | 01 Mar 1994 | 27 Dec 1995 | | January 1935 | Im Rehwinkel 3, Heusenstamm, D-63150 Germany |
| HOGAN, David Michael RESIGNED | Director | 29 Dec 1995 | 01 Apr 2012 | | February 1947 | 506 Midway Circle Brentwood, Tennessee 37027, Usa |
| KIEFFER, Bernhard Fritz RESIGNED | Director | 29 Dec 1995 | 26 Dec 1996 | | March 1934 | 11 Old Chimney Road, Huntsville, Alabama, 35801, Usa |
| PARKER, Clive RESIGNED | Director | 31 Dec 1999 | 28 Feb 2003 | | November 1964 | Schlossstrasse 37, 65719 Hofheim, Germany |
| REID, Dale Gary RESIGNED | Director | 03 May 2012 | 15 Jul 2013 | Usa | December 1955 | 1000, Six Ppg Place, Pittsburgh, Pa 15222, Usa |
| RILEY, Gary L RESIGNED | Director | 29 Dec 1995 | 31 Jul 1997 | | April 1937 | 4226 Tarzana Estates Drive, Tarzana 91356 California, Usa, FOREIGN |
| RUSSELL, Lewis Michael RESIGNED | Director | 23 Sep 1996 | 23 Sep 1996 | | August 1947 | 833 So Rimpau Blvd, Los Angeles, California, 90005, Usa |
| TOLLEY, Trevor David RESIGNED | Director | 01 Apr 1998 | 31 Oct 1998 | England | December 1952 | Tolbrook Coventry Close, Kinnersley Severn Stoke, Worcester, Worcestershire, WR8 9JR |
| WALKER, Neil Jonathan RESIGNED | Director | 04 Nov 2013 | 31 Dec 2015 | England | June 1967 | PO BOX 29, The Pensnett Estate, Kingswinford, West Midlands, DY6 7NP, United Kingdom |
| WALTON, Jon David RESIGNED | Director | 01 Apr 1998 | 01 May 2011 | | September 1942 | 137 Hoodridge Drive, Pittsburgh, Pennsylvania 15228, Usa |
| WETHERBEE, Robert Solon RESIGNED | Director | 03 May 2012 | 28 Feb 2013 | Usa | August 1959 | 1000, Six Ppg Place, Pittsburgh, Pa 15222, Usa |
| WHITWORTH, John Edward RESIGNED | Director | 20 Aug 1993 | 27 Dec 1995 | United Kingdom | December 1944 | Tara Long Walk, Chalfont St Giles, Buckinghamshire, HP8 4AW |
| WHITWORTH, John Edward RESIGNED | Director | | 14 May 1993 | | December 1944 | 2 Garners End, Chalfont St Peter, Gerrards Cross, Buckinghamshire, SL9 0HE |