At the AWS ReInvent 2019 conference, Vanguard had a presentation, where they detailed moving a chunk of their US-based IT infrastructure to AWS in that year. The plan in 2020 was to move their regional IT back-ends to AWS.
If they've gone significantly to cloud, this means they can leverage a lot of new analytical applications and platforms, AI/ML, etc.
Infosys have significant experience on the cloud side, so it could be Vanguard using them instead of building their own teams to do it.
Vanguard being a financial firm obviously eyes IT as a cost center which should be eliminated.
This is globalization in effect. Perils and all...