Those in consultancy and construction were also found to be some of the UK's happiest workers.
However, staff in retail and teachers are amongst the unhappiest employees in the UK. And its uncertainty over pay that’s causing this job dissatisfaction.
The survey, undertaken by job search engine, Adzuna, on 1,000 workers found that two out of five believe they were paid less than their colleagues.
Over half (53%) said they had no idea of their true value to employers and said they would never discuss salaries with a co-worker. Just 13.6% have been successful when asking their boss for a pay rise.
Workers in their twenties were most secure in their levels of pay, whilst those aged 35-44 were least confident – Sky News reports.
"British workplaces are rife with uncertainty over pay," said Adzuna co-founder Doug Monro. "An ingrained lack of transparency over earnings and salary bandings has created a culture of conviction others must be paid more than us. Combined with a lack of knowledge of what our own skills are worth to employers in today's job market, this spells a recipe for disaster for ambitious career builders."
It’s often advised against discussing personal information such as salaries at work, although research has found that keeping salaries hush can actually harm performance, hiring and the organisation.
Speaking to Business Insider, David Burkus, an Associate Professor of Management at Oral Roberts University, cites a study where participants were asked to complete data entry tasks. Those who were given salary information "worked harder and significantly increased their performance" in the second round.
If it’s proven to encourage better performance, why are so many firms shying away from transparency?
Burkus believes that it’s down to fear: "It's fear that when people find out that different people get paid differently, they're not going to be able to have the maturity and make the mental leap to see that there are reasons why a certain person is paid more than the other.”
However, this method could also help to put an end to the gender pay gap. “When employees are armed with data about their pay and the pay of their coworkers, it provides the opportunity to bring inequities to the attention of management,” Burkus writes. "Openness remains the best way to ensure fairness.”