StructuralEIT,
I've been in a role of hiring for some time and I have to say I've always steered more towards M.S. degree candidates.
There are good, strong engineers with the B.S. only but for me personally I really became a much better engineer with my M.S.
For online M.S. degrees, if I was confronted with two otherwise equal candidates and one had an "in school" M.S. and the other an online M.S., I would most likely go with the "in school" person.
My direct contact with my professors on a daily basis, my exposure to other students on a deily basis, the exposure to research in the lab, etc. all offer a superior experience in my opinion.
In addition, I know what graduate schools out there have high reputations in Structural Engineering and I'd question a school's stature if it offered an online program or ONLY offered an onlline program....don't know that I can describe why, or back it up, but maybe just because of my own experience and what I know to be true.
So what I'm saying is - for your direct question on whether an online program would be looked down upon by other managers, I'd say on average yes. That doesn't mean an online program isn't good or beneficial. It's just that there are many engineers out there that would be unaware of how good the online format is and be suspicious.