Before signing a contract with an individual California Registry member, verification bodies must also follow the California Registry’s policies and process to determine the potential for a conflict of interest.

Standard Conflict of Interest Form
Conflict of Interest Renewal Form
Conflict of Interest Policy


ISO 14065 GHG Accreditation Program


ANSI is administering a GHG validation/verification body accreditation program under ISO 14065. As a part of the accreditation process, applicants must be witnessed by ANSI Assessors at an on-site visit at their offices, and also while performing a verification. View firms already enrolled in the program below.


The California Registry, The Climate Registry and the Reserve have agreed to accept verifications from a verification body participating in the accreditation program as long as they are subsequently accredited. ANSI’s website lists accredited verification bodies enrolled in the program and the applicants currently undergoing the accreditation process that members and project developers may select. If however, the applicant verification body is not subsequently accredited, the reporter/member must repeat verification with an accredited body. Accredited verification bodies that are enrolled in the program are denoted with an * below.


For more information on obtaining accreditation or to request an application, please visit ANSI’s website on the GHG accreditation program or the accreditation section of our website.


The following organizations may serve as verification bodies to California Registry members. The companies listed are experienced firms providing GHG verification services.

California Registry Recognized Verification Bodies

Verification Body

Mailing Address


Advanced Waste Management*

6430 Hixson Pike
Hixson, TN 37343
Rob Ellis
(423) 843-2206
[email protected]
AMEC Geomatrix Inc.+
510 Superior Avenue
Newport Beach, California 93663
Anne McQueen
(949) 574-7082
[email protected]
Analytical Environmental Services+
1801 7th Street, Suite 100
Sacramento, CA 95811
Erin Quinn
(916) 447-3479
[email protected]

Ashworth Leininger Group+

601 East Daily Drive, Suite 302
Camarillo, California 93010
Michael Waller
(805) 764-6003
[email protected]

Bureau Veritas Certification*
515 W. 5th Street
Jamestown, NY 14701

Dave Church
(716) 484-9002
[email protected]


Cameron-Cole, LLC+
50 Hegenberger Loop
Oakland, CA 94621

Chris Lawless
(510) 777-1858
[email protected]


Carbon Verification Service, LLC+
915 L Street, Suite C PO Box 294
Sacramento, CA 95814

James J. Groome, President
(916) 208-9389
[email protected]


Completed Integrated Services Corporation, Inc. (CICS)*

19221 I-45 South, Suite 420
Conroe, TX 77385

Kurt Teuscher
(281) 292-8606
[email protected]

Conestoga-Rovers & Associates+
19449 Riverside Drive, Suite 230
Sonoma, CA 95476 
Vel Subramanian
(707) 935-4850
[email protected]

7407 Tam O’shanter Drive
Stockton, CA 95210

Jim Hodgson
(209) 473-5000
[email protected]
Davenport Engineering, Inc.+

2461 West 208th Street, Suite 200
Torrance CA 90501

Neal Davenport
(310) 787-4600
[email protected]
Det Norske Veritas (DNV) Certification, Inc.+

One Bush Street, 12th Floor
San Francisco, CA 94104

Barbara Toole O’Neil
(415) 318-3913
[email protected]

E5, Inc.+

11358 Knott Street
Garden Grove, CA 92841

Sherrie Walters
(714) 373-3800
[email protected]
Eastern Research Group (ERG)+
8950 Cal Center Drive
Suite 348
Sacramento, CA 95826

Paula Fields
(916) 361-6751
[email protected]


E. H. Pechan & Associates+
1202 Aquila Loop
Celebration, FL 34747

Stephen Roe
(407) 864-1895
[email protected]


Environ International Cooperation+
6001 Shellmound Street, Suite 700
Emeryville, CA 94608
Douglas Daugherty
(510) 420-2513
[email protected]
Erler & Kalinowski, Inc+
1870 Ogden Drive
Burlingame, CA 94010

Andrew Safford
(650) 292-9100
[email protected]


Ernst & Young+

41 Rue Ybry 92576 Neuilly sur Seine Cedex

Jan Le Moux or Meg Fricke
[email protected]
First Environment, Inc.*+
770 L Street
Suite 950
Sacramento, CA 95814

Jay Wintergreen
(916) 492-6080
[email protected]


GHG Analytical+
262 Michelle Court
South San Francisco, California 94080
Eddy Tabet
(650) 616-1200
[email protected]
GHG Climate Team, LLP+
12247 Welch Road
Wilton, CA 95693
Ray Kapahi
(916) 687-8352
[email protected]
HF&H Consultants Inc.+

201 North Civic Drive, Suite 230
Walnut Creek CA 94596

Rick Simonson
(925) 977-6955
[email protected]


ICF Consulting Services+
(An ICF International Company)

28202 Cabot Road
Suite 510
Laguna Niguel, CA 92677
Scott Broten
(949) 347-6110
[email protected]
Insight Environmental Consultants, Inc.+
5500 Ming Avenue, Suite 360
Bakersfield CA 93309
Doug Shaffer
(661) 282-2200[email protected]
Locus Technologies+
299 Fairchild Dr.
Mountainview, California 94043
John Wesley Hawthorne
(650) 641-8264
[email protected]
KEMA Registered Quality, Inc.*

4377 County Line Road
Chalfont, PA 18914, USA
Pierre Salle
(215) 997-4519
[email protected]
Lincus, Inc.+
55 East Huntington Blvd. Suite 320
Arcadia, CA 91006
Jorj Nofal
(877) 525-8898
[email protected]
Nexant, Inc.+
101 Second Street, 10th Floor
San Francisco CA 94105
Flora Chui
(415) 369-1029[email protected]
Southern California Sales Office
9191 Towne Centre Drive
Suite 510
San Diego, CA 92122
Jeanette Halliday
Business Development Manager, NSF-ISR
(734) 649-3186
[email protected]
Toll Free: (888) 673-9000 ext. 3804
Direct: 734-827-3804
Mobile: 734-883-7803
Fax: 734-827-7164
Paragon Consulting Services+
1300 SW 6th Avenue, Suite 320
Portland, OR 97201
Michael Koszalka
[email protected]
Rincon Consultants, Inc.+
790 East Santa Clara Street
Ventura CA 93001
Matthew Maddox
(805) 641-1000 x20[email protected]
Ruby Canyon Engineering Inc. *

743 Horizon Court, Suite 385, Grand Junction, CO 85106, USA Michael Cote
(970) 241-9298
[email protected]

Ryerson, Master and Associates, Inc., a member of the Lloyd’s Register Group of entities*+

735 State Street
Suite 407
Santa Barbara, CA 93101
Ivor John
(805) 730-1338
[email protected]
Schreiber, Yonley & Associates, Inc.+
16252 Westwoods Business Park
Ellisville, MO 63021
Kathy Strubberg
(636) 256-7200
[email protected]
Scientific Certification Systems*
2200 Powell Street, Suite 725
Emeryville, CA 94608


Robert J. Hrubes, Ph.D
Phone: (510) 452-8007
[email protected]
Shaw Environmental & Infrastructure, Inc.+
4005 Port Chicago Highway
Concord, California 94520
Rich Wilson
(661) 326-1112
[email protected]
Sierra Research+
1801 J Street
Sacramento, California 95811
Jeffrey Adkins
(916) 444-6666
[email protected]


SCS Engineers*+

3117 Fite Circle
Suite 108
Sacramento, CA 95827
Pat Sullivan
(916) 361-1297
[email protected]


Tetra-Tech EM Inc. +

1999 Harrison Street, Suite 500 – Oakland, CA 94612 Ed Sussenguth
(510) 302-6300
[email protected]
Trinity Consultants, Inc.+
1 Technology Drive, Suite F-215
Irvine, CA 92618
Vineet Masuraha
(949) 296-4101
[email protected]


TÜV SÜD America, Inc.+

10040 Mesa Rim Road
San Diego, CA 92121
Paul J. Wierl
Product Manager
Direct: (519) 727-9980
Mobile: (978) 884-9507
Fax: (978) 977-0157[email protected]
Versar Inc. +

7844 Madison Avenue, Suite 167,
Fair Oaks, California 95628
Satish Natarajan
(916) 475-0090
[email protected]
WZI Inc. +
1717 28th Street
Bakersfield, California 93301
Jesse Frederick
(661) 326-1112
[email protected]


*  Indicates ANSI Accredited Verification Body

+ Indicates ARB Accredited Verification Body

 Indicates approved Verification Body for the Electric Power Generation/ Electric Utility Industry

 Indicates approved Verification Body for the Forest sector

  Indicates approved Verification Body for the Livestock sector

 Indicates approved Verification Body for the Landfill sector

 Indicates approved Verification Body for Cement sector