A survey has found that 87% of the engineers and plumbers questioned reported that they were either very or quite sure about their future prospects.
It shows that building services engineers are the most confident among any of the trades surveyed by employee benefits company ECIC.
Its survey found that 33% of respondents had worked in excess of 50 hours a week last year, and 21% had worked up to 60 hours a week.
Out of these, 30% said they regularly worked evenings and weekends.
This had led to 18% suffering from stress-related conditions such as high blood pressure, headaches and panic attacks, with 23% considering alternative careers. However, nearly half (46%) said that they had earned more last year than in 2013, while 39% earned the same.
ECIC said the findings showed that greater employee support was required to retain much-needed skills and expertise, and to increase staff loyalty levels.