This PhD thesis focuses on three strategies to sustain employability: development (i.e. adjusting one’s knowledge base), mobility (i.e. changing jobs) and work redesign (i.e. making adjustments to the current job). Less educated employees make relatively little use of these three options. This is due to a lack of confidence – for example in their ability to successfully complete a training course or find a new job. Positive experiences help to build this confidence. New HR tools do not appear to be required to achieve this. Instead, access to existing tools should be improved, for example by making them more ‘small-scale’, though they should by no means be small in scope. It turns out that successive reorganisations make it even harder to r...