With considerable experience mixing and mastering a variety of audio in a range of contexts, I would be more than happy to take on this role. Over the years I have worked in Logic Pro X, Ableton Live and ProTools software, editing mixing and arranging a variety of audio such as songs from rock bands, sound effects for podcasts and short animated clips, and orchestral music of my own composition ready for sale online. I have also worked in video editing software when composing for film in order to match my audio to the video, however based on your description of the job it sounds much more audio-based, which is exactly what I do!
I'm also currently looking for freelance work that will continue and lead to other jobs in the long-run, so this opportunity sounds ideal for someone like me.
I hope to hear from you soon!
Chris.