If you can get CPO, they are just fine. I have bought 3 of them.
Yes, I would agree with the Otter Box,
I saw one yesterday on a friend's phone and was impressed that it includes a protective front cover that is sealed against accidental splashes.
Also helps to protect the screen from goudges from sharp objects, like scribes, files, wire brushes, screwdrivers, etc...
I have hardened case with a belt clip...... but, you must remove the phone from the case to use it. argh!
It has a magnetic clip that holds a fold over cover in place..... nice and sturdy, but for your husband's job.... otterbox
The case that I am using is Military Ballistic grade, but it does not have a protective front cover. I use it daily in my construction job with no issues. I keep the phone (in the case) in my front pocket. The case has a rubbery grip edges on it that keeps it from slipping out of your pocket unnoticed.
In addition to that, I have tied a neckstrap around the top lip of the case, (next to the earplug jack) and throw that neckstrap around my neck.
I have had a couple of times been glad that was on my neck, as a loose linen shirt let it fall out and over a toilet as I bent down to clean out the "residue" there. The phone just dangled from my neck in midair. (whew!)
* Speck CandyShell Grip- Black/Slate: