The new platform is to launch in early 2013 to help Blackberry compete with Apple and other smartphone makers.
Thursday's announcement comes one week after the Pentagon ended its exclusive deal with RIM to supply its vast workforce with Blackberry smartphones.
Another government agency, the US Immigration and Customs Enforcement agency, also said it was dropping the Blackberry device altogether in favor of Apple's iPhone.
The US military and intelligence agencies have long preferred the Blackberry due to security concerns and had worried that Apple, Android and other smart phones lacked sufficient safeguards.
But the technology has advanced and Pentagon officials said innovative applications available on other smartphones could be useful for different units or offices.