Need 4 instrumental rock/electronic tracks mastered for an EP

I need 4 songs mastered for an instrumental rock/electronic EP I've been working on. I've already mixed the songs (attached as mp3s). For reference tracks, I used Mick Gordon's DOOM 2016 soundtrack (specifically track 11: BFG Division and track 8: Flesh & Metal). Attached is the mix down of the 3rd track which is the heaviest one in the EP.

Additional info:
I'm an indie artist. Check out the song I attached. I'm interested in working with a very experienced mastering engineer. I don't have a hard deadline for this. I'm looking to master 3-5 songs. The song is mixed and ready to be mastered.