The Belgian Railways consist of three companies
SNCB/NMBS is the National Railway Company of Belgium. Owner and manager of the rolling stock, it is responsible for passenger train services
Infrabel is the owner and the manager of the railway-infrastructure. It is responsible for signalling and railway safety.
HR Rail is the subsidiary responsible for human resources. It is the legal employer of all employees of the Belgian Railways (SNCB, Infrabel and HR Rail)