Young scientists are Early Career Scientists (ECSs) identified as researchers without a permanent contract or tenure. This report summarizes the activities of the young scientist fora created within the four major experiments at the LHC (ALICE, ATLAS, CMS, and LHCb). The fora consist of the Junior Community in ALICE, the Early Career Scientist Board in ATLAS, the CMS Young Scientist Committee, and the Early Career, Gender and Diversity Office in LHCb. Also found in this report is a summary of the approaches taken by each forum to meet the needs of ECSs.