He's been careering from an entry-level position to executive management in just five years.

careering 是动词 career 的现在分词形式。career 本义是"职业、事业"，在这里用作动词，表示"快速移动、疾驰"，引申为"在职业生涯中快速晋升"的意思。careering 生动地描绘了职业发展像赛车般快速前进的状态。