Contact us:

Dr. Marcelo Hirschler
2 Friar’s Lane
Mill Valley, CA 94941

Tel:     (415) 388-8278
Fax:     (415) 388-5546
Email:  mmh@gbhint.com

Mr. Tim Earl
6862 Shallowford Way
Portage, MI 49024

Tel:      (415) 250-1500
Email: tearl@gbhint.com

Our homepage has a lot of more information!

We also publish a monthly bulletin: Fire Safety & Technology Bulletin.