go-getter 
noun informal
An aggressively enterprising person: boys are expected to be assertive go-getters...
- In their heyday, we have discovered, Shakers were business go-getters and technologists.
- This often includes lazy or incompetent peers, ineffective management, or a seniority system that rewards obsolete employees and punishes newer, more aggressive go-getters.
- Market historians tend to view early American farmers as acquisitive, money-making, land-hungry, entrepreneurial go-getters.
Derivatives
go-getting
/ adjective ...- It is quite possible that the strong-willed go-getting CEO's have been brought up by a very capable and active mother and learnt from them unconsciously.
- If the government is keen on winning the confidence of the people, it must unleash some of its go-getting, hands-on, upright and efficient bureaucrats to take charge of these areas and implement development programmes on a war footing.
- As such, the punk movement, whether it would acknowledge it or not, paved the way for the go-getting - or selfish, depending on your point of view - decade that would follow.