It will likely depend upon the rules and guidelines of the company which you are hired by and their auto insurance provider as to how long removed your DUI will need to be so that you will be permitted to drive and be insured in a company car.
In Ohio the DUI is listed at least 6 years on your driver's history since it is noted by the OH Bureau of Motor Vehicles (BMV) that it is considered a first DUI offense if you are found operating a vehicle with a prohibited alcohol concentration or drug of abuse with no prior OVIs within the last 6 years on the driving record. It is considered a second offense if you have at least one prior OMVI within the last 6 years on the driving record.
In Ohio they have at one time or the other referred to being under the influence as either an OVI, for Operating a Vehicle under the Influence, DUI for Driving Under the Influence and OMVI for Operating a Motor Vehicle under the Influence.
If you want to find out how long your DUI will remain on your driving record then check with the BMV. As for use of a company car, as explained above this is typically up to the individual company and their insurance carrier so you would have to discuss with the hiring agent if the DUI on your record would keep you from using the company car or not.
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