If you want to have him grade the whole sequence, say ... it's done one of two ways.
The first is you export a high-quality file, probably an upper ProRes or DNx format, and the other person takes that file, breaks it into scenes with scene detect (both Premiere and Resolve can do that) ... then grades that set of 'clips'.
The other way is you make a couple exports of the sequence ... probably an FCP XML file of the sequence, and typically an H.264 of the whole sequence so they can match the clips on their end against that low-res H.264. Send those two files with the rest of the original media on a drive or upload service.
The latter is more complex, but can if done right get a bit higher end result. The first option is far easier, and if you're not going to movie theaters with a 20 foot wide screen, should work ok.