Hello dlearyous,
Glad that I got in here first with a substantive answer. The answer to your question is really two parts.
Before I tell you that, let me warn you that pretty much all the posts below mine will be from people telling you it's not possible to truly make diving a career, that the salries are too low and that you should just do it for fun or part time. Don't believe it.
To paint the entire industry and every job avaiable with such a brush is just foolish and short-sighted. Take a look at who's doing the posting, how many posts they make on SB and judge the source. As on any message board, there's a hard-core crust of people ready to shout down enthusiastic, hopeful people based on their bad experiences. I'm not saying many dive jobs don't offer low wages. They do. But I am saying that there are indeed good opportunities out there and that many, many, many people are happily working and living comfortably in diving.
Having said that, there's one thing I do beleive to be true: To have your best shot at working in the industry, you need to be an instructor. While we have had Divemaster graduates from our Diving Instructor Training (Thailand) internship program that make a liveable wage (for Thailand) during high season, the fact is that worldwide, DMs don't earn enough. (In Thailand we have grads pulling in about 30,000-60,000 baht per month, working and selling photo CDs to liveable customers.)
Instructors can do much better. In Thailand we reguarly see our grads land jobs paying 80,000-120,000 a month during high season and average about 30,000-45,000 during low season. That's a decent wage if you plan to live in Thailand and with the Malay and Thai economies being of near-equal size, I'd guess you coudl do the same at home.
We've had grads go on to work for cruise ships where all their accommodatins and food are paid for and they still get US$3,000 per month in tips and salary per month. And they get to live on a cruise ship. That's a pretty nice life IMHO.
If you'd like to become an instructor, I invite you to give us a try. See us at the link below (DivingInstructorTraining.com). We have a 2-month DM to Instructor program that is entirely all-inclsive and offers not only your IDC, but a full suite of additional courses to make you as employable as possible.
The second part of your question -- What's out there -- is more easily determined. I invite you to set up a free account at Jobs4Divers.com, which is the Internet's largest database of diving jobs. As of today there are nearly 800 jobs listed. Browsing the site will give you a good understanding of the types of jobs are available in what areas for specific certifications. There are, in fact, a large number of firms seeking DMs, so you might find something good right now.
Jobs4Divers is another reason to come to join at Aqauanauts for your instructor training. The site is the public face of our separately incorproated, full-time
diving jobs placement service. The jobs you see online are not published for 2 days after the employer posts them. If you were an Aquanauts customer, you'd get immediate access to the jobs as soon as they are posted, giving you a big leg up in the job competition. In addition, we have an oflline database of 6,500 dive centers worldwdie we can query for job openings not even on the website yet.
Hope that helps. Please do have a look at both our training and jobs site and feel free to contact me if you have questions.