The phrase "growing cadre" refers to a group of people that is increasing in number. It suggests that more individuals are joining a particular group or organization over time. Full definition
On the home front, the efforts of NNI?s growing cadre of researchers are drawing attention. (sciencemag.org)
Listening to books has grown more appealing, thanks to a growing growing cadre of famous actors. (goodereader.com)
Instead of petering out, it's garnered the attention and respect of a small but growing cadre of scientists, energy executives and adventurous investors around the world. (canadianbusiness.com)