Have had class A for 8 yrs how can I get a tanker job??

Ive had my class a's for 8 years now, and have not put them to work as I should. I obtained them with government municipal county job, in water construction division, operating tandem dump trucks for material hauling, low boy flat bed transporting heavy equipment, standard air brake crew truck with 3 ft trailer hauling excavation equipment the whole rig equals 53 ft as an 18 wheeler would. Our company does not provide any sort of document detailing the hours, or history of operating commercial vehicles or driving other than having the license themselves. We stay within our county limits of highway, and inner city road districts, interstates for quick access at certain circumstances. From what I've learned is that having a cdl is not enough, but the proof of experience document wise, and driving is what brings you in the door. Im certain after researching average driver salaries that its worth a try to leave were I am currently under paid while possessing a clean MVR and CDL A, for a better income. I run excavations equipment, drive commercial trucks, perform labor in hazardous trenching and sewer waste water areas, water mains, road repair, etc., and bring home $800 biweekly. Yep thats it.. I've gotten advice from friends that drive fuel delivery trucks too get my endorsement and apply for local fuel tankers.....which I plan to do asap here in atlanta, GA. Any advice from one who knows or has been through the starting steps as I am trying to get pass would help alot!!! Thanx