Announcing examination for engineering aid, mathematics aid, physical science aid, $3,760 to $5,355 a year (grades GS-3 through GS-7), engineering technician, $5,885 to $8,955 a year (grades GS-8 through GS-12), physical science technician, $5,885 and $6,435 a year (grades GS-8 and GS-9), announcement no. 154.

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