I am a person who often has to sift through applications - certification would be completely useless as far as I’m concerned, because I’m looking for aptitude outside of memorising where features are in a version of the editor that’s years old. Game engines move fast, when I look at candidates, I look at their previous work as an indication of their capability. I will often hire candidates with zero Unreal experience, because I presume that anyone capable of working in a rapidly changing environment can adapt and train themselves on the job.