Through the CI/CD deployment pipeline that all code changes get deployed through. Primary engineering team reviews code and ensures things are tested appropriately.

If it requires a managed change, engineering team helps them draft the execution and schedule.

Skills would be similar to IT or dev ops but with expectation that they can code.

With a ci/cd in place and a reviewer from the devs it’s probably very less value that the offshore employees are providing.

Moreover these kind of upgrades sometimes involve unforeseen regressions which again can’t be solved by these employees.