The phrase "large cadre" refers to a big group of people who share a common purpose or profession. It typically implies having a significant number of skilled individuals within a particular organization or field. Full definition
These consist of male drones, but mostly large cadres of female «worker» bees that attend to the hive and its inhabitants and forage for food. (sciencenewsforstudents.org)
Some choose the Sermon on the Mount, and an unfortunately large cadre who are simply looking for a justification of their bigoted, selfish, vindictive worldview. (religion.blogs.cnn.com)
That was a central lesson that emerged from a recent interview with three Seattle - area superintendents who form part of that state's unusually large cadre of women school administrators. (edweek.org)