My brother, who is an engineer, used to work in a construction firm before where his boss reprimanded him and his co-workers to have proper mens workwear. During week days, he wore his overalls but on weekends, he used his favorite denim pants.
One of the requirements imposed was for him to wear quality jeans so that he could easily move around and still felt protected. And when he had no work, he could wear his jeans without anyone noticing it that he was actually wearing his uniform.
If your work requires you to be on the field, better wear levis or dickies jeans to keep you protected. A lot of people I knew prefer to wear these jeans because it is comfortable and reliable. To know more about the latest trends and styles on these jeans, better check it online so you can start deciding which style suits you best.