Medical laboratory sites utility costs issues

The medical laboratory sites I'm into right now are having issues with utility costs in different branches. Actually, the energy bill is so high and its not normal. This could be a cause for investigation. The managers are thinking about the possible techniques that will track consumption and operations cost effectively. What do you suggest in managing and seeing to it that the different sites are doing well or those have to be given attention in terms of utility use and cost. Is it advisable to hire other services to monitor the laboratory energy expense and consumption? Any other suggestions on how to resolve such issues?