If you think you’re content toiling away at your desk, crunching data, or hammering out the details of a grand design, try asking a construction worker or facility service employee if they ever whistle while they work.

The answer will change your perspective about getting excited for work everyday.

According to TINYpulse’s 2015 Best Industry Ranking report, gathered from its anonymous one-question feedback surveys from over 30,000 employees across more than 500 organizations, among 12 distinct industries, construction and facility service workers are the happiest employees.

Next in line were consumer products, technology, and software. Telecom, energy, and utilities are grouped together, coming in fourth place. Health care rounded out the top five. Manufacturing brought up the rear in last place.

It’s important to note that the construction industry–both residential and commercial–is bouncing back from a recession low of $716.9 billion, or 4.9% of GDP, in 2010. Three years later, it was up to $925.4 billion, or 5.8% of GDP. Likewise, 70% of what the U.S. produces is for personal consumption, making for a strong consumer product sector.

A lack of routine safety meetings could send a message to staff that their employer doesn’t care what happens to them.

On a macroeconomic scale, this steady growth is definitely a mood booster, as it contributes to job creation and higher salaries. Who isn’t happy to get a bit more dough in their paycheck?

But before you decide to ditch your keyboard and go buy a tool belt–or a lawn mower, as landscapers were among this group–the survey team at TINYpulse recommends taking a closer look at what actually drives workplace satisfaction, and what makes people unhappy.