self-starter

/S EH1 L F S T AA0 R T ER0/
noun
  1. 1

    A person who shows initiative and resourcefulness.

  2. 2

    A mechanism (usually one operated by electricity, compressed air, a spring, or an explosive gas), attached to an internal-combustion engine, as on an automobile, and used as a means of starting the engine without cranking it by hand.

Source: https://en.wiktionary.org/wiki/self-starter