Much like Accenture or McKinsey, we were assigned a "partner", who was always looking to upsell more services and get more entrenched in the organisation. E.g. "we've built system X (which I assure you is better than what you have), how can we use it to do Y and switch off your existing system Z."

A lot of the times, they were just using stuff like Hadoop, and massively over-engineering simple data integration tasks.