| contact | position | phone | fax | email |
| Gregory L. Singer, PE | Owner/Licensed Prof.- Ext 2 | 800-652-3110 | 800-652-3110 | glsinger@glspe.com |
| Kim Andrew | Administrative Assistant- Ext 1 | 800-652-3110 | 800-652-3110 | kandrew@glspe.com |
| Toll Free | Phone/eFax/Voice Mail | 800-652-3110 | 800-652-3110 | N/A |