| Business | Phone |
| Ferrco Engineering 896 Manhattan Ave # 34, Brooklyn 11222 | (718) 349-0821 |
| John J Natoli Consulting Engr 2232 E 73rd St, Brooklyn 11234 | (718) 241-6969 |
| Harold Weinberg Pe 76 Court St # 20, Brooklyn 11201 | (718) 858-5033 |
| Felix Pustylnik Pe 415 Avenue P # 2, Brooklyn 11223 | (718) 376-1989 |