Boeing itself (unsure about this company though) was widely reported to have offshored their senior engineers a few years ago. eg:

https://www.bloomberg.com/news/articles/2019-06-28/boeing-s-... (paywalled)

https://archive.is/vdg9S (paywall workaround)

Note that there were several articles about it around the time, the above one is just the first reasonable seeming one from a quick search.