O*NET OnLine offers a Military to Civilian Crosswalk that may help you improve your veterans outreach by targeting specific Military Occupational Classification codes that relate to civilian positions.
Simply enter the job title you are looking to fill (e.g., accountant, human resources, warehouse, etc.) into the military search section. Most civilian occupations will display a list of the occupational specialty codes used by the different branches of the military. You might consider including a list of these codes in your job announcement as a way to help veterans better understand the correlation between their military training and the civilian career you have available.