He won't loose his job by company default, he would only loose his job if is mental state is not secure. It's sad all round, those effected in anyone. Thoughts are with the gentlemans family and friends and likewise the train drivers and all those touched by these sad events.
Update on missing teenager. http://www.devonlive.com/search-continues-for-missing-teenager-sol-mclean-from-dawlish/story-30404386-detail/story.html