Although most diesel service technicians and mechanics learn on the job after a high school education, employers are increasingly preferring applicants who have completed postsecondary training programs in diesel engine and machinery system diagnostics and repair. In addition, industry certifications are important. These certifications could be universal such as ASE Automotive or EPA air conditioning certifications, or they could be manufacturer specific. Most companies will provide paid training for non-certified employees to achieve these certifications and require them in order to advance in a career path. However, many postsecondary programs incorporate these certifications into their curriculums so that the students / employees can go straight into more advanced training and / or accelerate their career path.