The project, known as the Joint Enterprise Defense Infrastructure cloud, or JEDI, involves transitioning massive amounts of Defense Department data to a commercially operated cloud system. Companies are due to submit bids for the contract, which could last as long as 10 years, on Oct. 12.
Google's announcement on Monday came just months after the company decided not to renew its contract with a Pentagon artificial intelligence program, after extensive protests from employees of the internet giant about working with the military. The company then released a set of principles designed to evaluate what kind of artificial intelligence projects it would pursue.
"We are not bidding on the JEDI contract because first, we couldn't be assured that it would align with our AI Principles," a Google spokesman said in a statement. "And second, we determined that there were portions of the contract that were out of scope with our current government certifications."
The spokesman added that Google is "working to support the U.S. government with our cloud in many ways."
The Tech Workers Coalition, which advocates for giving employees a say in technology company decisions, said in a statement that Google's decision to withdraw from the cloud competition stemmed from "sustained" pressure from tech workers who "have significant power, and are increasingly willing to use it."
Google is behind other technology companies such as Amazon and Microsoft in obtaining government cloud-security authorizations that depend on the sensitivity of data a service is hosting.
The JEDI contract attracted widespread interest from technology companies struggling to catch up with Amazon in the burgeoning federal government market for cloud services. Final requirements for the project were released in July after a months-long lobbying campaign in Washington by tech companies including Microsoft, IBM and Oracle that opposed the Pentagon's plans to choose just one winner for the project instead of splitting the contract among a number of providers.
"Had the JEDI contract been open to multiple vendors, we would have submitted a compelling solution for portions of it," the Google spokesman said. "Google Cloud believes that a multi-cloud approach is in the best interest of government agencies, because it allows them to choose the right cloud for the right workload."
In a report to Congress, the Defense Department said making multiple awards under current acquisition law would be a slow process that "could prevent DoD from rapidly delivering new capabilities and improved effectiveness to the warfighter that enterprise-level cloud computing can enable."
The department also said it expects "to maintain contracts with numerous cloud providers to access specialized capabilities not available under the JEDI Cloud contract."