The phrase "fruitful career" means having a successful and fulfilling professional life, where you achieve your goals and make significant accomplishments. Full definition
Students are able to choose from nearly 100 different majors and areas of concentration that lead to successful and fruitful careers in teaching, administration, counseling, and more. (teachercertificationdegrees.com)
Nevertheless, he believes that answering the difficult questions leads to the most fruitful career. (sciencemag.org)
During my lengthy, fruitful career many achievements were made, and numerous awards and honors were presented. (sciencemag.org)