Past and Present Clients include:
- London Underground (TfL)
- High Speed 2 (HS2)
- Mott MacDonald
- WSP UK
- WSP Denmark
- Thales-Strukton Rail
- Railway Management Systems Ltd
- Balfour Beatty Civil Engineering Ltd
- Balfour Beatty Engineering Services Ltd
- Network Rail
- Qatar Rail
- Deutsche Bahn International (DBi)
- Costain Laing O'Rourke (CoLOR)
- Costain Skanska Joint Venture (CSJV)
- Advent Communications Ltd
- Solid State Logic Ltd
