This is almost 'cosy' with the amount of lovingly described medicine, anatomy, geology, space science and so on.  Unfortunately the plot itself is thin and too tidy ... and despite the author's lived experience, this didn't 'feel' as military-grounded as I'd hoped.  The characterisation is thin, too, and there's a lot of "his or her" when a singular 'they' would have been much smoother to read.

Recommended if you mostly read non-fiction, perhaps, and will enjoy the infodumping.