DERA was formed in April 1995 as an amalgamation of:
The chief executive throughout DERA's existence was John Chisholm. DERA's staffing level was around 9,000 scientists, technologists and support staff.
DERA was split into two organisations, based on short-lived transition bodies known as PDERA ("privatised" DERA) - becoming a commercial firm, QinetiQ - and "RDERA" ( "retained" in Government DERA) - becoming the Defence Science and Technology Laboratory (Dstl).
At the split, QinetiQ was formed from the majority (about 3/4 of the staff and most of the facilities) of DERA, with Dstl assuming responsibility for those aspects which were best done in government. A few examples of the work undertaken by Dstl include nuclear, chemical, and biological research. In the time since the split both organisations have undergone significant change programmes. QinetiQ has increased its focus on overseas research with a number of US and other foreign acquisitions, whereas Dstl has a major rationalisation programme.
Eds. Robert Bud and Philip Gummett, Cold War Hot Science: Applied Research in Britain's Defence Laboratories 1945-1990, Harwood, 1999 ISBN 90-5702-481-0 /wiki/Philip_Gummett ↩