I'm in my 40's have been with the same company (FAANG) for over a decade. I'd say a majority of the management (including engineering) is in their mid-30's to 50's. It looks like the entirety of the senior management in engineering in my org is in their 40's.
There are fewer individual contributors in their 40's, but I know several (some moved from manager back to IC, others stayed IC).
Maybe this is a bigger issue at startups, where the founders are in their 20's?
I'd say the many/most have been with the company 10+ years (low attrition!). New hires are generally younger, but new hires that are more senior (IC or Manager) are generally older. That's not surprising, is it?
There are fewer individual contributors in their 40's, but I know several (some moved from manager back to IC, others stayed IC).
Maybe this is a bigger issue at startups, where the founders are in their 20's?