The phrase "decade of one's career" refers to a period of ten years that is significant and influential for a person's professional life or job. Full definition
He spent the first decades of his career studying what today we call cognitive psychology, or the study of how people think, perceive, and respond to stimulus. (educationworld.com)
She went on to teach elementary children for 26 years before spending the final decade of her career in school management. (host.madison.com)
As a result, the surviving catalogue of her known works does not at all reflect the six decades of her career as a painter and mixed - media artist. (artspace.com)