I don't believe that your integrity or doing the right thing or your ethics can be at risk here. You were honest when you filled out the forms. Now IF you signed something like Nanook described then yes you should report the ticket, otherwise I would keep that to myself till the next years cert. This is your chance at getting the driving job, don't put that in jeopardy by giving up info that they don't really need at the time. Once you have completed the training and made seniority and are filling out next years form report the ticket as is proper. In the mean time either talk to a lawyer about the possibility of reduced charges or call the court and ask them about defensive driving or deferred adjudication. Deferred Adjudication basically puts your ticket on hold for a certain period of time, if you get no more moving violations during that time the ticket is dismissed, never appears on your record, although it will cost you more money that just paying the ticket.Could be worth it in the long run because your insurance doesn't go up and you don't receive points.
I think O 9.5 is right and that you are not being dishonest by not telling them at this point in time.