Sedentary behavior is a well-known risk factor for several non-communicable diseases. The aim of our study was to investigate sedentary time and physical activity in crane operators and office workers within work and non-work context. Fourteen crane operators and 15 office workers wore activPAL continuously for up to five consecutive working days to obtain sitting/lying, standing and stepping time, objectively. Working time and sleep time were also documented. Both groups spent work hours (72.9 % and 72.9 % for crane operators and office workers, respectively) and non-work hours (60.3 % and 54.1 %) mostly sedentary. Subjects of the two groups (crane operators and office workers, respectively) accumulated 3036 and 3177 steps at work and 6236 and 6181 steps outside work on workdays. No significant (p < .05) changes were found between the two studied occupational groups. Health promotion activities for all sedentary occupations to reduce prolonged sitting time should be encouraged.