millions of federal contractors in wash dc area

https://www.washingtonpost.com/business/capitalbusiness/while-federal-employment-shrinks-in-dc-government-contractors-are-on-a-hiring-spree/2018/07/22/d80b03e4-8c45-11e8-a345-a1bf7847b375_story.html?utm_term=.8afd3aa88bd1

no total number is given - but 700K people are waiting for security clearances