| Centrale | +31 (0)30 2320 | 420 | Main number |
| Bart Oskam | +31 (0)30 2320 | 400 | Sales/purchase |
| bart@janoskam.nl | 401 | ||
| Ronald Wieman | +31 (0)30 2320 | 408 | Sales/purchase |
| ronald@janoskam.nl | 409 | ||
| Erik Oskam | +31 (0)30 2320 | 404 | Sales |
| erik@janoskam.nl | 405 | ||
| Nana Chachava | +31 (0)30 2320 | 412 | Sales/purchase |
| nana@janoskam.nl | 413 | ||
| Kees Oskam | +31 (0)30 2320 | 415 | General |
| kees@janoskam.nl | 416 | ||
| Elly Oskam | +31 (0)30 2320 | 418 | Accounting |
| elly@janoskam.nl | |||
| Carolien van der Leeden | +31 (0)30 2320 | 420 | Clerk |
| carolien@janoskam.nl | |||
| Harry Pijper | +31 (0)30 2320 | 421 | Controller |
| harry@janoskam.nl | |||
| Fax | +31 (0)30 2320 | 422 | |
| Jaap Zuidam | +31 (0)30 2320 | 420 | Calibrating department |
| Wil van Schaik | +31 (0)30 2320 | 420 | Logistics manager |
