Contact Us
| Position | Name | Phone | |
| Sales | Odess Dimopoulos | 630-497-8700 | odydimo@gmail.com |
| Accounts Receivable | Christi Moeller | 630-497-8700 ext 329 | ChristiM@grp7.com |
| Controller | Sara White | 630-497-8700 ext 228 | SaraW@grp7.com |
| Engineering | Slade O'Keefe | 630-497-8700 ext 251 | Slade@grp7.com |
| Clean Fill Processor | Marjory McMahon | 630-497-8700 ext 234 | marjory@reliablematerials.com |
| Gradations | Derrick Kloc | 847-717-0614 | Derrick@grp7.com |
| IT Manager | Robert Bier | 630-497-8700 ext 289 | Info@bluffcitymaterials.com |