It involves math at a research level, but from what I've observed, people in industry with engineering job titles make relatively little use of math. They will frequently tell you with that sheepish smile: "Oh, I'm not really a math person." Students are told with great confidence by older engineers that they'll never use their college math after they graduate.

Not exactly AI by today's standards, but a lot of the math that they need has been rolled into their software tools. And Excel is quite powerful.