rustler

an ambitious person who eagerly goes after what is desired the job requires a rustler who doesn't always need to be told what to do Synonyms bootstrapper, go-ahead, highflier (or highflyer), hummer, hustler, live wire, powerhouse, go-getter, self-starterRelated Words eager beaver; achiever, comer, doer, enterpriser; he-man, individualistNear Antonyms dawdler, idler, loafer, lounger, putterer, trifler; goldbrick, malingerer, procrastinator, shirker, slacker; drone, lazybones, sluggard; dallier, laggard, lingerer, loiterer, slowpoke, stick-in-the-mud; ignorer, ne'er-do-well, neglecter; daydreamer, dreamer; dropout, quitter