I ran across a similar situation when I wanted to get on as a Teamster hauling open-rack car haul trucks. It took almost a year from the time I submitted my resume to the day I started as a trainee.
I've never hauled tankers, but I have 5 years with open racks, and about 5 years hauling dry van freight. The rest was hauling racing displays, promotional or support vehicles or enclosed liftgate auto transporters (a moving van with a back door that turns into an elevator).
Keep at it, man. If you want to haul tankers then stick to your job hunting. Don't give up. If you have no experience, be completely honest with the personnel manager. If he blows you off, stay persistent. Ask about training programs. It isn't rocket science but I would think you have to learn about the various products you might haul. If you're endorsed for tankers, you've already passed a fairly stringent test of knowledge. I've found that many interviewers will seriously consider a novice if they detect a real willingness to learn and good aptitude.
Here's a list of companies from everytruckjob.com;
http://www.everytruckjob.com/directories/tanker-companies.htmlI encourage you to identify the ones that are Teamster. You can find out which ones are union in your area by getting in touch with the nearest Teamster Local. I'm sure they will tell you which companies they have contracts with. Remember, the
company hires you, not the union. You'll have a probation period, just like you probably had at every other company you worked for, but you usually won't be allowed to join the Teamsters until after you get through probation.
Best freight to have:
Freight that you just have to open a valve and let flow off your truck.
Beats the living shit out of hand unloading 1000 boxes of something out of a dry van in the middle of the summer. I speak from experience on the latter.