garageman

[ guh-rahzh-man, -rahj- or, esp. British, gar-ij-, -ahzh- ]

/ gəˈrɑʒˌmæn, -ˈrɑdʒ- or, esp. British, ˈgær ɪdʒ-, -ɑʒ- /

a person who works in a garage, as a mechanic or attendant.

Origin of garageman

First recorded in 1915–20; garage + -man

We got acquainted with the garageman's family, for one thing.

The Car That Went Abroad |Albert Bigelow Paine
Who the garageman is, apparently as you say, that it came from a garageman somewhere.

Warren Commission (11 of 26): Hearings Vol. XI (of 15) |The President's Commission on the Assassination of President Kennedy
He was wondering whether, after the summer's maturity of being a garageman, Ted would "get busy" in the university.

Babbitt |Sinclair Lewis
I got a heavy canvas lining, and the garageman patched and vulcanized and sold me a variety of appliances.

The Car That Went Abroad |Albert Bigelow Paine

Its acceptance by the garageman imposes on him the duty of exercising due care for its safety and protection.

Putnam's Handy Law Book for the Layman |Albert Sidney Bolles