Facing the demographic challenge, an increasing healthy life expectancy and the need of organisations for experience and competencies, the focus of the presented empirical survey is on the workforce capacity of older persons beyond formal retirement age in good mental and physical health. As pension schemes might not sufficiently guarantee financial support for a growing older population, Reday-Mulvey (2005) suggested to supplement pension income by a fourth pension 'pillar' from a flexible extension of working life....