Simplify the following text for a Grade 10 native English-speaking person.
Original: After the war , he graduated from the All-Union Correspondence Polytechnic Institute in Moscow and got a job at the Institute of Chemical Physics of the Soviet Academy of Sciences .
Simplified: After the war ended , he went to and graduated from the All-Union Correspondence Polytechnic Institute in Moscow . After leaving school , he began work at the Institute of Chemical Physics .