A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | 1
| Obiettivo Lavoro (20) | OCB (8) |
| OCC Computer Personnel (6) | OCE Belgium (9) |
| Ocmw Asse (8) | OCMW LIER (8) |
| OCMW MAASMECHELEN (6) | Octopus Computer Associates (14) |
| Office National du Ducroire (ONDD) (5) | OfficeTeam (303) |
| Offre d'emploi (7) | ON Semiconductor (22) |
| Only SALES Job (10) | OpenERP sa (5) |
| .OPTIMA (16) | Optima Financial Planners (6) |
| OPTIMA RECRUITMENT EUROPE s.r.o (5) | ORA (7) |
| Ora RKM (5) | Orange Business Services / Silicomp (12) |
| Oranje vzw (8) | ORBID (22) |
| ORBID NV (13) | Ordina Belgium (12) |
| OSBJ (8) | Oudenaarde, AZ Oudenaarde (8) |
| ouvrier (8) | Oxfam-Solidarité (14) |
| Oxfam Solidariteit (10) |