Headcount Pinnacle Group April 30, 2020 In staffing, typically refers to the total number of temporary workers at a particular client. Related Articles: Practical Steps to Rolling Out a Global MSPAt Pinnacle Group, we have gone through this process with our clients and have experienced the ups and downs of implementing programs in other countries. We hope these tips will make implementation a little easier to envision. Glossary: Vendor Management System (VMS)