[houstoncorridor]

I worked in IT for a large energy company as a developer. The market cap of said company is in the tens of billions.

We did use Office 365 because those people had our CIOs ear and gave various discounts to lock us into the MSFT stack, but in-house development was all deployed to our own hardware. Other platforms we ran as part of IT (databases, ERP, analytics) also all were inhouse.

The number one reason were not running all we could on AWS or Azure could be broken down as follows

1) we didn't have the technical knowledge to make the transition 2) the people who were interested in this at all were the younger kids out of college 3) the company is run by older white males who don't trust the younger kids (FTE) and certainly don't trust the IT contractors 4) there was massive resistance to change, even when our industry is bleeding because of low energy prices and little to no profitability 5) Fundamental misunderstanding or lack of understanding of how to secure out data in the cloud 6) business people saw IT as a barrier to innovation 7) IT was very risk averse and with business people not trusting them, it only reinforced their inability to progress

As for [5], we had numerous conversations with MSFT and AWS about trying to run their cloud on premise. We were convinced that we can protect our data better (even though it's not our company's vote competency) than companies like AWS, who are literally in this exact business.

Yeah for all that and other reasons, I left.