After the destruction of the '' Enterprise '' - D , he was on detached leave ( ' : '' The Way of the Warrior '' ) , where he meets former Enterprise - D crewmember and DS9 's Chief of Operations , Miles O'Brien .
After the destruction of the '' Enterprise '' - D , he was on detached leave ( ' : '' The Way of the Warrior '' ) , until he was called to Deep Space Nine to advise Captain Sisko when a Klingon fleet masses at DS9 . 
 On arriving , he meets former Enterprise - D crewmember and DS9 's Chief of Operations , Miles O'Brien .