Support lead mechanics. A mechanic assistant involved in providing direct support to lead mechanics. Will be under the lead mechanic's supervision or may help out by ensuring that the lead mechanic has ready access activities. Repair and Replace Automotive Parts Mechanic assistants required to repair and replace parts require a high level of technical knowledge, but a mechanic assistant may more advanced repairs or replacements replacements under the supervision of lead mechanic, such as swapping out engine components or transmissions. Support