Need a vocal track tuning

Require vocal tuning on dance music vocal track. There are 4 vocal stems and one combined so either require 4 to be done separately or as one merged if possible.

Additional info:
I need the vocals tuned as well. The song has less than 10 tracks recorded that need mixing. I'm going to hire a different mastering engineer. I'm interested in working with a very experienced mixer. . I need it by 11 September, 2019.