For information on certification, contact

20 PGA Drive, Suite 201
Stafford, VA 22554-8900
Tel: (540) 720-7484
Email: info@agsc.org
https://agsc.org

For information about union membership, contact

7234 Parkway Drive
Hanover, MD 21076-1307
Tel: (410) 564-5900
Email: mail@iupat.org
http://www.iupat.org

For information on certification, contact

1945 Old Gallows Road, Suite 750
Vienna, VA 22182-4012
Tel: (866) 342-5642, ext. 127
http://www.glass.org