"Additional staffing" refers to the act of hiring more people to join a team or workforce to help accommodate a higher workload or meet the needs of a growing organization. Full definition
As the advertising continues to provide more work than the current staffing can maintain, I am constantly evaluating the need for additional staffing. (lawyermarketing.com)
During a time of teacher shortages, additional staffing resources can prove crucial for schools struggling to find teachers. (educationbusinessuk.net)
It would have required additional staffing, and we were also concerned that we'd run out of square footage in the office. (realtormag.realtor.org)