self-starting

noun

1. starter(def 3).
2. Informal. a person who begins work or undertakes a project on his or her own initiative, without needing to be told or encouraged to do so.

noun

1. the former name for a starter (def. 2)
2. a person who is strongly motivated and shows initiative, esp at work

n.1894, of engines, 1960, of persons (especially workers), from self- + starter. Self-starting (adj.), of motors, is attested from 1866.