Questions related to overtime compensation

MTAS was asked whether a full-time city employee who is also a volunteer firefighter is entitled to overtime compensation when his combined hours as a city employee and as a volunteer firefighter exceed 40 hours, whether a full-time firefighter who works in the water department on Saturdays is entitled to overtime for hours worked in excess of the hours he is permitted to work during his work period, and where a city employee does dissimilar work, how his overtime compensation is calculated.