All Employees: Professional and Business Services: Investigation and Security Services in California was 171.22247 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, All Employees: Professional and Business Services: Investigation and Security Services in California reached a record high of 171.22247 in January of 2024 and a record low of 76.49002 in June of 1991. Trading Economics provides the current actual value, an historical data chart and related indicators for All Employees: Professional and Business Services: Investigation and Security Services in California - last updated from the United States Federal Reserve on March of 2024.