| | | | | | | | |
| Name of Corporation | | Jurisdiction of Incorporation |
| | |
| Castronics, LLC | | Delaware |
| Chemtec Energy Services, L.L.C. | | Texas |
| CXT Incorporated | | Delaware |
| IOS Acquisitions, Inc. | | Delaware |
| IOS Holdings, Inc. | | Delaware |
| IOS/PCI, LLC | | Louisiana |
| James Clark Inspections, Inc. | | Texas |
| L.B. Foster GmbH | | Germany |
| L.B. Foster Protective Coatings, Inc. | | Texas |
| L.B. Foster India Holdings Company | | Delaware |
| L.B. Foster International Holdings Company | | Delaware |
| L.B. Foster Latin America Holdings Company | | Delaware |
| L.B. Foster Produtos Ferroviários do Brasil Ltda. | | Brazil |
| L.B. Foster Rail Technologies Canada Ltd. | | Quebec, Canada |
| L.B. Foster Rail Technologies, Corp. | | British Columbia, Canada |
| L.B. Foster Rail Technologies, Inc. | | West Virginia |
| L.B. Foster Rail Technologies (UK) Limited | | United Kingdom |
| L.B. Foster Technologies (Beijing), Ltd. | | China |
| L.B. Foster UK Ltd. | | United Kingdom |
| Mike’s Pipe Inspection, Inc. | | Kansas |
| Netpractise Limited | | United Kingdom |
| OTI Operating, Inc. | | Oklahoma |
| Portec Rail Nova Scotia Company | | Nova Scotia, Canada |
| Salient Systems, Inc. | | Ohio |
| TEW Holdings (2012) Limited | | United Kingdom |
| TEW Holdings 2008 Limited | | United Kingdom |
| TEW Engineering Limited | | United Kingdom |
| TEW Plus Limited | | United Kingdom |