daily operation of boilers and air conditioning equipment. monitoring temps and pressure of the same. maintenance of pumps boilers and HVAC equipment. knowledge of plumbing and related equipment. knowledge of carpentry and construction. respond to hotel guest complaints and make on site repairs as needed. knowledge of electrical (switches outlets ballasts etc.) general repairs and mainteance as needed.replacement of air filters. i did all the jobs in the engieers department and building mainteance.