More than 4 Million Americans Have Access to Classified Information, Including 1 Million Contractors

The 4.2-million figure that the article opened with came from the Director of National Intelligence's first-ever report to Congress on security-clearance numbers, mandated by the FY2010 Intelligence Authorization Act and delivered in September 2011. The report was the first time the cumulative size of the U.S. classified-information access population had been publicly stated as an audited figure, and it was substantially larger than the pre-report estimates that watchdogs and Congressional staff had been working from.

The contractor breakdown — that roughly 1 in 4 of the top-secret-cleared population were private-sector contractors, not federal employees — was the part that most concerned the post-9/11 intelligence-oversight community. The post-Snowden conversations of 2013 and the post-Booz-Allen-Hamilton conversations about contractor vetting standards both drew explicitly on the 2011 ODNI report's numbers. Tim Shorrock's earlier book Spies for Hire (2008) and Dana Priest and William Arkin's Top Secret America series in the Washington Post (2010) had laid the analytical groundwork; the 2011 numbers gave it a concrete denominator.

The clearance population continued to grow in absolute terms over the following decade, with periodic Government Accountability Office reports identifying inefficiencies in the OPM-then-DCSA clearance-investigation process. The 2011 figures, and the AllGov coverage that surfaced them, were the entry point for a now-decade-and-a-half-long policy conversation about the size, vetting standards, and contractor share of the U.S. classified-information access population.