| Company | Category | Area | Address | Web | E-mail | Contact person |
| JASPER STEEL FABRICATION INC | Steel-Structural (Manufacturer | Pennsylvania | 191 PALMER INDUSTRIAL RD, WILLIAMSPORT, Lycoming, Pennsylvania, 17701-8518, USA |
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Timothy Jasper |
| JASS SECURITY SYSTEMS | Security Control Equip & Syste | Pennsylvania | PO BOX 176, HATBORO, Montgomery, Pennsylvania, 19040-0176, USA |
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John Adam |
| JASTRZEBSKI ENGINEERS INC | Engineers-Consulting | Pennsylvania | 1112 UPPER STATE RD, CHALFONT, Bucks, Pennsylvania, 18914-2505, USA |
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Bill Jastrzebski |
| JASTRZEBSKI ENGINEERS INC | Engineers-Consulting | Pennsylvania | 2103 N BROAD ST, LANSDALE, Montgomery, Pennsylvania, 19446-1054, USA |
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