No way. You'll make more like $700-$1500 per day, but it's not long term employment, it's a contract job for a few weeks to a month at a time. You'd have to have 12 months of work lined up with over time to clear $500k or more. I'm not sure how you could ever hit $1 million in one year. A lot of these divers will only have a couple jobs a year limiting annual income. There are even cases where sat divers compete with each other by giving gifts to project managers at O&G companies in order to line up more work.

These days, remotely controlled underwater vehicles have taken over most the work, especially at the deeper (and higher paying) depths.