“Enterprise” is not a field. I take it to mean “working with traditional businesses.” That encompasses a huge number of business domains and technologies, you can’t really specialize in “enterprise” in a meaningful way. I call those “companies that make money already,” as opposed to startups. Some of them will also have ML/AI work (in fact lots of them).

ML/AI is either research and startup work or already included in “enterprise” applications. Amazon, Microsoft, Apple, Google, Adobe, etc. are both enterprise companies and doing a lot of work with ML/AI.

If blockchain ever turns out to have real business uses, not just enabling the crypto circus, it will become enterprise too. At this point it looks like a solution in search of a problem.