noun
auto mechanic; car mechanic; automotive technician
Refers to a certified professional who maintains and repairs automobiles. Often implies formal qualification.
兄は自動車整備士の資格を取った。
My older brother got his auto mechanic certification.
あの自動車整備士はエンジンの修理が得意だ。
That auto mechanic is good at repairing engines.
Compound of 自動車 (automobile) + 整備士 (maintenance technician).