Compagnie Électro-Mécanique
| Company type | Subsidiary |
|---|---|
| Industry | Rail transport |
| Founded | 1932 |
| Defunct | 1983 |
| Successor | Alstom |
| Headquarters | Lyon, France |
Area served | Worldwide |
| Products | Locomotives High-speed trains Intercity and commuter trains Trams People movers Signalling systems |
Compagnie Électro-Mécanique (CEM) was a French electrical engineering manufacturer based in Paris, Le Havre, Lyon, Le Bourget, Nancy, Dijon. It was a subsidiary company of Brown, Boveri & Cie.