If jamie receives iron from miners and turns it into parts for machines, in what sector of industry does she work? secondary tertiary primary binary

The answer is "secondary sector of industry".

Manufacturing and Industry sector known as secondary sector, some of the time as production sector, incorporates all parts of human exercises that change crude materials into items or merchandise. The optional part incorporates auxiliary preparing of crude materials, nourishment fabricating, material assembling and industry.  

The secondary sector is regularly isolated into substantial industry and light industry (see mechanical building). Every business, association or expert gathering, chamber or society may likewise have their own grouping.