Work for mastering engineers is hard to find these days. It’s quite expected since you can buy the same software tools that many mastering engineers use. However, they are still a highly valuable and worthwhile resource.
The clean and precise signal path and playback environment that you get when you hire a mastering engineer could never be replicated at home. Their skills and accuracy can never be achieved with DIY jobs. You’re paying for the ears and experience, which can’t be found in a plugin with a preset. Therefore, let’s make use of their expertise while they’re still around.
Read more about this here: https://bobbyowsinskiblog.com/2019/07/10/mastering-endangered/