With the British Rocket Group
In 1953, "the Director the British Rocket Group" tracked down an astronaut who had mutated into an alien creature following an experimental mission to Central London, where he defeated it in front of BBC cameras. The broadcast was subsequently played off as science fiction by the British government to prevent mass panic. (PROSE: Background) Bernard still worked alongside Dr Rachel Jensen and Allison Williams in the British Rocket Group by 1963. (TV: Remembrance of the Daleks)
Behind the scenes
Seven different actors have officially portrayed the character of Bernard Quatermass on television and film in his original series (including André Morell and Andrew Keir), with none considered "definitive". However, Lance Parkin has stated that he meant to visualise the elderly, nearly crazed John Mills version from the fourth and final Quatermass serial as the one who appeared in the Virgin New Adventures novel The Dying Days.
In the Doctor Who universe, the Nightshade serials (PROSE: Nightshade) have many similarities to the Quatermass serials. One may assume that because Bernard Quatermass is real, Nightshade effectively replaces Quatermass in the Doctor Who Universe (although Background implied that the first Quatermass serial, at least, existed within the DWU as documentary footage which had been passed off as fiction as part of a cover-up).