Members with a COS Certification 
(chronologically listed)

ASP

Date of Certification

Certificate Number

ExxonMobil Production Company

ERM-CVS

January 9, 2019

COS-0005-190109A08

Anadarko Petroleum Corporation

ERM-CVS

August 29, 2018

COS-0005-180829A07

BHP Billiton Petroleum

ABS-QE

January 6, 2017

COS-0001-170106A05

BP Exploration and Production Inc.

ERM-CVS

November 21, 2016

COS-0005-161121A06

Shell Exploration and Production Company

BVC

October 28, 2016

COS-004-161028A05

Anadarko Petroleum Corporation

BVC

October 26, 2016

COS-0004-161026A04

Noble Energy

DNV-GL

October 13, 2016

COS-0003-161013A06

ConocoPhillips Company

ERM-CVS

October 1, 2016

COS-0005-161001A05

Murphy Exploration and Production Company

ERM-CVS

May 20, 2016

COS-0005-160520A04

Cobalt International Energy, L.P.

ERM-CVS

April 18, 2016

COS-0005-160418A03

Helmerich & Payne International Drilling Company

DNV-GL

April 5, 2016

COS-0003-160405A05

Cameron International

DNV-GL

February 1, 2016

COS-0003-160201A04

Chevron North America Exploration and Production

ERM-CVS

December 28, 2015

COS-0005-151228A02

Schlumberger in the Alaska Region

DNV-GL

December 11, 2015

COS-0003-151211A03

Schlumberger

DNV-GL

April 27, 2015

COS-0003-150427A02

ExxonMobil Production Company

ERM-CVS

March 20, 2015

COS-0005-150320A01

Pacific Drilling Services, Inc.

BVC

January 14, 2015

COS-004-150114A03

Anadarko Petroleum Corporation

ABS-QE

April 11, 2014

COS-0001-140411A04

Marathon Oil Company

ABS-QE

February 6, 2014

COS-0001-140206A03

Shell Exploration & Production Company

BVC

January 3, 2014

COS-0004-140103A02

Hess Corporation

ABS-QE

January 2, 2014

COS-0001-140102A02

BP Exploration & Production Inc.

DNV-GL

November 21, 2013

COS-0003-131121A01

BHP Billiton Petroleum (Deepwater) Inc.

ABS-QE

November 18, 2013

COS-0001-131118A01

Statoil Gulf Services, LLC.

BVC

November 11, 2013

COS-0004-131113A01