It's definitely the kind of company you want to work at if you're middle-aged.
List this firm please, it might help someone.
But I don't think that's exclusively a software engineering issue. If I tried to become an electrician at 40, my guess is I'd encounter some bias, though probably less than in software.
One other thing: by "BigCorps", I'm referring to things like banks, Wal-Mart and so forth, not technology companies like eg Google.
Yeah, I'd much rather work at a traditional conservative BigCorp than a Silicon Valley company that never grew up from startup mentality.
If you do want to stay I tech, I'd recommend looking at the B2B telecom sector. It's far, far more conservative then any other part of the tech industry. They're the only tech companies that I've seen ban T-shirts in the office.
I just got hired by one in Texas that reflects that impression, which I had before I ever interviewed there.
They don't immediately adopt new technologies, but frankly, nowadays I see that as more as a feature than a bug (although once in a blue moon I wish the delay in finally adopting them, when they have been successfully proven themselves, wasn't so long).
The most glaringly conservative aspect of my current job is its very rigid adherence to process. Again I must say that, having worked in places where it wasn't the case, I'm so glad that process is followed strictly.
The big problem with this job is that I've acquired a ton of domain knowledge that probably won't be useful in another job. This means that I need to keep other tech skills (algorithms, programming languages...) much more finely honed. On the other hand, I've acquired top notch documentation skills.
EDIT: I also can confirm that there is plenty of >40yo people here. Definitely a good place to be when you reach that age, although I'm only in my eearly thirties. I've found also a high level of diversity in general, which is very, very good.
"I don't think Java is all that bad, and I can enjoy well-done object-oriented programming."
This is probably the most accurate opinion of Java the language I've seen, one that isn't tarnished by what anyone has seen in any proprietary codebase.
I would rather program in Java the programming language than Javascript any day of the year, even if I dislike the vast majority of popular Java frameworks like Spring, Hibernate, etc.