You send in your application and resume and are invited to take an online editing test. The test was perhaps 10 questions of sentences that needed to be corrected. When you pass that, you are invited to begin work, initially on very small assignments. The process seems decent enough at the start and if you are a decent editor/science person, it should be do-able.

I submitted my cv and covering letter, which was followed by a 15 questions test in 40 minutes. I was then intimated that I passed the test and the senior editors will contact me in 3 days. I am still waiting to hear from them. This test is based in Mumbai. Earlier I have a test in Canberra where I was given a passage to edit.