achiever
🇺🇸
/əˈtʃiːvər/
🇬🇧
/əˈtʃiːvə(r)/
A person who is very successful, especially in their job.
She's a high achiever in her field, always reaching her goals.
A person who reaches a certain level of success.
Even though he's considered a low achiever, he's content with his progress.