| 4-tel.com Inc. | | Management consulting company servicing the telecommunications and high tech industries. |
| Abinger Telecom | | Independent advice on all types of telecommunications projects including equipment specification, selection and project management within UK and Europe. |
| Actima | | Consultancy services for corporate customers and carriers, specialists for powerline communication and telecommunication for transport industry. |
| Ambridge Group | | Project management for global telecommunications. Offices in London, Frankfurt, and New York. |
| Arabian Construction Co. | | Arabian construction company offering information technology in the telecommunications industry. |
| Atlantic - ACM | | An international strategy consulting firm that focuses on the emerging and converging telecommunications and multimedia industries worldwide. |
| ATLAS Group | | Assists corporations with telecommunications planning, design, vendor sourcing and project management in North America, Latin America, Europe, Middle East, Africa and Asia. |
| Aurora Consulting | | An independent worldwide business consultancy for the new and old economy, focussing on strategy, planning, communications,research and analysis based on practical professional experience. |
| Black Inc. | | International consulting firm with clients all over the world. Provide project manager professionals and technical staffing resources to the industry on a project-by-project basis. |
| Callahan Associates International | | Develop and operate integrated broadband communications networks and wireless networks. Securing the capital backing to develop and operate a competitive business. |
| CCww | | Specialist in telecommunications consultancy who provide a complete software design and integration service to manufacturers of GSM, GPRS and UMTS handsets around the world. |
| ChaseWaterford | | Provides a range of management consultancy services aimed at assisting telephone companies reduce exposure to fraud and security failure. |
| Communications Advanced Technologies, Inc. | | Telecommunications firm providing logistical, consulting and call center services. Professional expertice in value added solutions, business development mission-critical support and products. |
| CompuCom Systems, Inc. | | Provides distributed desktop products and network integration services to fortune 1000 customers, including lan/wan projects, consulting and asset tracking, network management, help-desk and field engineering, procurement, configuration, distribution and software management. (Nasdaq: CMPC). |
| Comsil | | Hong Kong based, specializes in providing technical and commercial services from network planning, engineering and optimisation to commercial strategy advisory. |
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