| Business | Phone |
| A & A Consultants Inc 810 River Ave # 220, Pittsburgh 15212 | (412) 323-2200 |
| Advanced Technology Systems 639 Alpha Dr, Pittsburgh 15238 | (412) 967-1900 |
| Aea Technology Engineering Svc 241 Curry Hollow Rd, Pittsburgh 15236 | (412) 655-1200 |
| Allen & Shariff Corp 700 River Ave, Pittsburgh 15212 | (412) 322-9280 |
| Antakamatics 3500 5th Ave, Pittsburgh 15213 | (412) 802-7813 |
| Applied Analysis Inc 2104 Mountford Ave, Pittsburgh 15214 | (412) 322-7723 |
| Arty Engineering Inc 810 River Ave # 140, Pittsburgh 15212 | (412) 323-1511 |
| Atac Engineering Inc 300 Mount Lebanon Blvd, Pittsburgh 15234 | (412) 306-0199 |
| B & C Transit Consultant 1542 Lucille Dr, Pittsburgh 15234 | (412) 381-0613 |
| Blasland Bouck & Lee Inc 600 Waterfront Dr, Pittsburgh 15222 | (412) 231-6624 |
| Blazosky Assoc Inc 787 Pine St, Pittsburgh 15238 | (724) 733-2060 |
| Brace Engineering 3440 Babcock Blvd, Pittsburgh 15237 | (412) 367-7700 |
| Buchart-Horn Inc 2200 Liberty Ave # 300, Pittsburgh 15222 | (412) 261-5059 |
| Burns Engineering Inc Penn Center W, Pittsburgh 15276 | (412) 788-8200 |
| Business Development Group Inc 109 Dewalt Ave, Pittsburgh 15227 | (412) 882-0184 |
| Business Development Group Inc 1241 Earlford Dr, Pittsburgh 15227 | (412) 882-0184 |
| C V Engineering Inc 4840 Mcknight Rd # 208, Pittsburgh 15237 | (412) 364-2180 |
| James A Christenson 1123 Glencoe Ave, Pittsburgh 15220 | (412) 921-3726 |
| Cintar Inc 907 Penn Ave # 2, Pittsburgh 15222 | (412) 471-4150 |
| Civil & Environmental Consultants 333 Baldwin Rd, Pittsburgh 15205 | (412) 429-2324 |
| Claitman Engineering Assoc Inc 1340 Old Freeport Rd, Pittsburgh 15238 | (412) 963-6700 |
| Clean Air Engineering Inc 1601 Parkway View Dr, Pittsburgh 15205 | (412) 787-9130 |
| Cmc Engineering 1035 Boyce Rd # 120, Pittsburgh 15241 | (412) 257-9666 |
| D & D Engineering Inc 35 Wilson St # 205, Pittsburgh 15223 | (412) 784-1560 |
| Design Sciences Inc 105 Gadshill Pl, Pittsburgh 15237 | (412) 366-1141 |
| Di Gioia Gray & Assoc 11 Wisteria Dr, Pittsburgh 15235 | (412) 372-4500 |
| Di Perna & Assoc 332 Dewey Ave, Pittsburgh 15218 | (412) 731-2927 |
| Dynamic Soft Analysis 5001 Baum Blvd # 656, Pittsburgh 15213 | (412) 683-0161 |
| Earth Inc 8150 Perry Hwy, Pittsburgh 15237 | (412) 931-6393 |
| Ed Gaston Assoc Inc 1551 Pinehurst Dr, Pittsburgh 15241 | (412) 221-8556 |
| Emerging Technologies Inc 6327 Burchfield Ave, Pittsburgh 15217 | (412) 421-4408 |
| G Tech Inc 201 Penn Center Blvd # 470, Pittsburgh 15235 | (412) 823-7110 |
| Galletta Engineering Corp 1200 Penn Ave, Pittsburgh 15222 | (412) 261-3357 |
| Gannett Fleming Inc 601 Holiday Dr # 200, Pittsburgh 15220 | (412) 922-5575 |
| Ground Water Solutions Inc 100 W Station Square Dr, Pittsburgh 15219 | (412) 281-2415 |
| H F Lenz Co 1051 Brinton Rd, Pittsburgh 15221 | (412) 371-9073 |
| H2m1 Engineering 401 Liberty Ave, Pittsburgh 15222 | (412) 566-1040 |
| Hatch 1600 W Carson St, Pittsburgh 15219 | (412) 497-2000 |
| Hdr Engineering Inc 401 Liberty Ave # 3, Pittsburgh 15222 | (412) 497-6000 |
| Integrated Industrial Tech Inc 221 7th St # Ll, Pittsburgh 15238 | (412) 828-1200 |
| International Steel Svc Inc 7 Foster Plz, Pittsburgh 15220 | (412) 922-9100 |
| Jacobs Engineering Assoc Pc 35 Wilson St # 207, Pittsburgh 15223 | (412) 784-8004 |
| Johnson Mirmiran & Thompson 1000 Commerce Dr # 300, Pittsburgh 15275 | (412) 490-9800 |
| Kci Technology Inc 3424 William Penn Hwy # 230, Pittsburgh 15235 | (412) 824-7046 |
| Kraft Technical 626 California Ave # L, Pittsburgh 15202 | (412) 761-3881 |
| Kunz Engineering Consultants 1818 Kent Rd, Pittsburgh 15241 | (412) 831-1222 |
| Lea & Elliott Inc 401 Wood St # 1100, Pittsburgh 15222 | (412) 338-2100 |
| Max Leva 1 Hodgson Ave, Pittsburgh 15205 | (412) 922-2232 |
| Maguire Group Inc 503 Martindale St, Pittsburgh 15212 | (412) 281-6393 |
| Mc Cartney Enterprises 202 Eton Rd, Pittsburgh 15205 | (412) 922-8680 |
| Mc Cormick Taylor & Assoc Inc 7 Parkway Ctr # 201, Pittsburgh 15220 | (412) 922-6880 |
| Mdg Solutions Inc 1360 Old Freeport Rd # 3af, Pittsburgh 15238 | (412) 422-9300 |
| Ofr Engineering Assoc Inc 347 Mansfield Ave, Pittsburgh 15220 | (412) 922-7834 |
| Orbital Engineering Inc 1344 5th Ave, Pittsburgh 15219 | (412) 261-9100 |
| P L Frank Inc 5850 Ellsworth Ave # 301, Pittsburgh 15232 | (412) 361-7707 |
| Parson Brinckerhoff 4 Gateway Ctr, Pittsburgh 15222 | (412) 281-9900 |
| Pittsburgh Engineering Cnsltnt 2275 Swallow Hill Rd # 400, Pittsburgh 15220 | (412) 276-8200 |
| Renaissance Engineering 3352 Perrysville Ave, Pittsburgh 15214 | (412) 321-5423 |
| Sai Consulting Engineers Inc 1400 Penn Ave # 101, Pittsburgh 15222 | (412) 392-8750 |
| Martin D Schlesinger Pe 4766 Wallingford St, Pittsburgh 15213 | (412) 681-1655 |
| Senate Engineering 420 William Pitt Way, Pittsburgh 15238 | (412) 826-5454 |
| Norman Shorr Pe 4220 Saw Mill Run Blvd, Pittsburgh 15227 | (412) 561-5319 |
| Sigma Resources 7950 Saltsburg Rd, Pittsburgh 15239 | (412) 712-1030 |
| Slogan Engineering 300 Mount Lebanon Blvd # 200, Pittsburgh 15234 | (412) 563-3947 |
| Stv Inc 444 Liberty Ave # 325, Pittsburgh 15222 | (412) 392-3500 |
| Stanley R Swatchick Pe 300 Mount Lebanon Blvd # 314, Pittsburgh 15234 | (412) 257-8187 |
| Systems Planning Assoc 200 S Craig St, Pittsburgh 15213 | (412) 687-2813 |
| T W Consultants Inc 5500 Corporate Dr # 300, Pittsburgh 15237 | (412) 369-7500 |
| Technical Engineering Cnsltnts 804 White Oak Cir, Pittsburgh 15228 | (412) 343-2290 |
| Tetra Tech Nus Inc 661 Andersen Dr, Pittsburgh 15220 | (412) 921-7090 |
| Tetra Technologies Inc Cliffmine Rd, Pittsburgh 15275 | (412) 788-8300 |
| Thomas Monti & Assoc 651 Holiday Dr, Pittsburgh 15220 | (412) 928-3940 |
| Tower Engineering 115 Evergreen Heights Dr # 400, Pittsburgh 15229 | (412) 931-8888 |
| Towns Electric 6324 Jackson St, Pittsburgh 15206 | (412) 363-7249 |
| Trans Associates Engineering 4955 Steubenville Pike # 400, Pittsburgh 15205 | (412) 490-0630 |
| Trimark Engineers-Constructors 650 Smithfield St # 300, Pittsburgh 15222 | (412) 471-5900 |
| Unicer Consulting 2691 Marshfield Dr, Pittsburgh 15241 | (724) 942-0716 |
| Urs Corp 501 Holiday Dr # 300, Pittsburgh 15220 | (412) 351-2006 |
| Urs Corp 600 Grant St # P2, Pittsburgh 15219 | (412) 201-6984 |
| Wagester Engineering 801 Northridge Dr, Pittsburgh 15216 | (412) 344-9162 |
| Ward Electric Svc Corp 733 Bar Harbor Dr, Pittsburgh 15239 | (724) 325-5561 |
| Whitfield Services Group 2306 Tilbury Ave, Pittsburgh 15217 | (412) 422-4599 |
| Zba Inc 4415 5th Ave, Pittsburgh 15213 | (412) 687-4118 |
| Psi 850 Poplar St, Pittsburgh 15220 | (412) 922-4000 |
| R & B Systems Engineering 2020 Ardmore Blvd # 235, Pittsburgh 15221 | (412) 271-7724 |
| R & D Engineering 40 Oak Spring Dr, Pittsburgh 15238 | (412) 967-0449 |
| R F Mitall & Assoc Inc 117 Sagamore Hill Rd, Pittsburgh 15239 | (724) 327-7474 |
| R T Patterson Co 230 3rd Ave, Pittsburgh 15222 | (412) 227-6600 |
| Ralph Whitehead Assoc 2 Penn Ctr W # 120, Pittsburgh 15276 | (412) 512-6029 |
| Ray Engineering 1841 Universal Rd, Pittsburgh 15235 | (412) 795-5972 |