Simplify the following text for a Grade 8 native English-speaking person.
Original: Appointed Chief Constable of Hertfordshire Constabulary in 1944 ( but released from the army only in April 1945 ) , Young now commanded an establishment of 515 at a salary of Â # 1,290 .
Simplified: Young became Chief Constable of Hertfordshire Constabulary in 1944 ( but released from the army only in April 1945 ) . He was in charge of 515 officers at a salary of Â # 1,290 .