"SYSTEMS ENGINEERS are required for interesting work on the study of overall weapons systems (1) for simulator work associated with theoretical systems studies: (2) for work in a systems engineering laboratory containing a large Analogue Computer. Candidates for the first category should have a degree in Mathematics or Physics, and some years' experience on the simulation of guidance control systems. Candidates for the second category should have a minimum of H.N.C., and considerable experience of some of the following subjects is essential : Electro mechanical devices, D.C. amplifiers, pulse and video circuitry, general electronic techniques, precision electrical measuring techniques and relay circuitry."