The phrase 'intelligence apparatus' is correct and can be used in written English.
The intelligence apparatus of the US government is highly classified.
The Party became an intelligence apparatus.
Iran's security and intelligence apparatus are suspicious of dual citizens.
Will the civilian intelligence apparatus challenge the military?
What ensued was prolonged captivity at the hands of the Iranian intelligence apparatus.
Much of the architecture of the regime's judicial, security and intelligence apparatus remain intact.
If you have a secret, the Iranian intelligence apparatus will tear you apart to expose it.
The general has ordered an overhaul to the American military's intelligence apparatus in the country.
Their work is supplemented by that of the professional intelligence apparatus.
The links between the Haqqani network and Pakistan's intelligence apparatus are well-established.
The case comes amid heightened concern over the actions of South Korea's intelligence apparatus.
The domestic intelligence apparatus was meant to protect against just such extremist groups.
