American Welding Society
Phone: 800.443.9353
E-mail: info@aws.org
http://www.aws.org/

Welding.com
http://www.welding.com
Click on "Welding Resources" at the top of the page. Click on an area of interest.

National Institute of Metalworking Skills, Inc.
Phone: 703.352.4971
Fax: 703.352.4991
E-mail: tsnowden@nims-skills.org
http://www.nims-skills.org/
Click on "Credentialing."

National Center for Construction Education and Research
Phone: 888.622.3720
Fax: 352.334.0932
http://www.nccer.org/