Sentinel
Sentinel is an integrated management system for some safety critical competencies on the railway. Every cardholder must be registered and managed by a sponsor / employer. The system was introduced in April 1999 by Network Rail to improve the control and processes for track safety training / competence, certification and the supply of on-track labour.The purpose of Sentinel is to minimise the risk of untrained personnel from carrying out safety critical work on the railway. The sponsor / employer takes responsibility for the training, assessment and briefing activities that ensure that both the employer and employee are compliant with the requirements for each competency.
In subsequent years the system has been refined, developed and expanded its scope in order to capture a growing list of diverse competencies such that it now provides the necessary support structure for a formal competence management system.
Sentinel comprises two distinct, but interdependent, components:
- Management of the computerised records of individual training/competencies and the production, distribution and control of associated competency cards. This is known as the National Competency Control Agency (NCCA).
- Accreditation of licensed training and assessment providers (managed by Achilles Information Limited).

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