Job Description. Job Description. APPLY IN PERSON. 7900 Beechcraft Ave, Gaithersburg, MD 20879 or CALL : 301-370-2311. This position is eligible for a $1,000 Sign-on BONUS for new employees after completion of 6 months of employment with good performance and good attendance. Must mention this ad at time of hire. Must have. CDL Class A or B Drivers License with air brake certification. Clean MVR and safe driving record. Pass pre-employment drug sc...