I think what the biggest hurdle in this case, is the probation is still active.
I don't think the offense is a disqualifier, as much as the fact it's still not completed.
Most of the major carriers will expect anywhere from 7 to 10 years of no criminal activity, from the date of the completion of the conviction.
I think any OTR job is going to be impossible, until all terms of a conviction are completed, and get at least a minimum of 3 years past that.
But it gets worse....
Felon's are not allowed to cross into Canada, without a Canadian pardon.
Many carrier's will not hire a felon, even if they have gone 10 years past the debt to society, if they are unable to enter Canada.
A Canadian pardon is very time consuming, and expensive. They also have a 10 year period of no criminal activity, before they will even consider a felon for a pardon.