One of the verbs introduced here deserves special attention. «Организовать» belongs to a small group of so-called biaspectual verbs. These verbs work both as a perfective and an imperfective verb—the interpretation depends on context and common sense:
"Working on something" is a set expression in Russian too. Use «над» with the Instrumental:
The adjective "successful" is mostly used with nouns meaning some endeavors or attempts to do something; also with nouns like "company", "businessman".
Their use with random words for people is also creeping in slowly (as a calque from English) but it is going to sound weird and awkward for quite a while. Unlike English, this usage in Russian is mainly associated with fame and financial success, so it limits the professions that feel "right" and unambiguous when described as «успешный».