Foreign Minister Jose Valencia told Democracia radio Monday the civil servant "worked in a very close way" with Assange. He did not provide the official's name or go into any detail, other than to say that embassy workers must respond first to the Ecuadorian state.
The removal comes as tensions between Ecuador and Assange continue to mount. Ecuador recently accused WikiLeaks of helping spread leaked personal documents belonging to President Lenin Moreno.
British police stationed officers outside Ecuador's embassy last week after tweets from WikiLeaks claiming Assange could be kicked out of the building where he has lived since 2012 within "hours to days."