"全体决策人员" can be translated into English as "all decision-makers" or "the entire decision-making body", depending on the context and the level of formality required.
"All decision-makers" is straightforward and commonly used, emphasizing the inclusivity of everyone involved in the decision-making process.
"The entire decision-making body" is more formal and might be used in official or organizational contexts, referring to the collective group responsible for making decisions.