What do I do if company submitted false information to a DAC report provider, and has caused me to be unable to work in any safety-sensitive job?

I am looking for information regarding a possible suit against a former employer, a major trucking company. I have written documentation from this employer, which verifies and demonstrates their inaccurate, and I believe, deliberate reporting of events related to my work history. I have spoken with a few people who have either worked for the DOT previously, and are very familiar with the guidelines employers must follow regarding posting reports, and have been advised that it might be a good idea to seek professional counsel.