The phrase "staff vacancies" refers to job positions or openings within a company or organization that need to be filled by new employees. Full definition
As a result of teachers who chose to leave rather than adjust to a new principal, he also had a number of staff vacancies to fill. (naesp.org)
However, the report notes: «Despite the relatively low numbers of principals reporting unfilled vacancies in individual curriculum areas, there are still fairly large numbers who report that they have difficulties in suitably filling staff vacancies across all areas of the curriculum.» (teachermagazine.com.au)
Identified staff vacancies and consulted managers regarding their hiring goals and timelines (resumebuilder.org)