Amazon Web Services has a new market for its cloud computing, analytics, and storage services.

This week, the Defense Department granted the cloud computing giant a provisional authorization to host Impact Level 5 workloads, which are the military and Pentagon’s most sensitive, unclassified information.

“This further bolsters AWS as an industry leader in helping support the DoD’s critical mission in protecting our security,” the company said in a statement. “The AWS services support a variety of DoD workloads, including workloads containing sensitive controlled unclassified information and National Security Systems information.”

» Get the best federal technology news and ideas delivered right to your inbox. Sign up here.

Already, DoD is using AWS to host sensitive, mission-critical workloads, including the operational control system for the Global Positioning System. The provisional authorization allows military customers an easier route to use AWS for a variety of other IT services.

In total, three commercial companies—AWS, IBM and Microsoft—are now able to host and store the military’s most sensitive unclassified data. AWS has expanded its defense business, it remains the dominant cloud service provider in the intelligence community by virtue of its $600 million contract with the Central Intelligence Agency. AWS’ C2S cloud hosts classified information for the 17 intelligence agencies.

The company’s Beltway presence continues to grow in lines with its federal market share. AWS recently announced a new corporate headquarters and up to 1,500 jobs in Fairfax County and expects a new East Coast computing region to come online in 2018. Called US-East, the region will essentially be a mass of computer networks operating by AWS entirely for government customers, including the Defense Department.