Work-related disorders account for a significant part of total healthcare expenditure. Traditionally muscle-skeletal disorders were predominant as source of work absenteeism but in the last years work activity-related disorders have increased remarkably. Too little activity at work, sedentarism, or too much work activity leads to stress. The individualized behavioural analysis of employees can support ergonomy experts in optimizing work environments. However, in order to understand which aspects of the working environment need to be improved a clear understanding on the behaviours and working conditions of employees is needed. This requires analyzing and summarizing the multi-dimensional set of variables that describes a work environment. Process Mining Technologies can offer a human understandable view of what is actually occurring in workplaces in an individualized way. In this paper, we present a proof of concept of how Process Mining technologies can be used for discovering employees work flows in order to support the ergonomy experts in the selection of more accurate interventions for improving occupational health.