Oil Gas Mineral Production/Exp Srv - (OGS)
OrganizationDate of Certification
1Cat Tech Inc04/04/2005 04:32:52 PM
2CGGVeritas Services Holding (U.S.) Inc.10/15/2002 03:06:14 PM
3Core Laboratories LP09/20/2002 06:47:37 PM
4National Grid US and all of its Subsidiaries04/03/2009 03:52:06 PM
5Qittitut Consulting LLC10/10/2007 09:58:51 AM
6Smith International, Inc.03/27/2008 02:58:50 PM
7TransAtlantic Petroleum Corp.07/15/2009 12:24:42 PM