Merging maximo animation to a current asset

I was not sure how to best go about what to write for my title topic and I do apologise if it seems to come across as confusing or misleading. I currently have an asset I bought from the marketplace called Personnel which includes the necessary assets I need for a project I am working on, however I am considering adding an additional animation to the Personnel asset. What I want to try and achieve is something along the lines of this -> I currently have a scientist that I am using in my lab in my project and when my character TPS comes in to contact or nearby the scientist with his gun pointing in the direction of the scientist I want the scientist to cower/appear scarred. I have found the right animation I want to use to achi e this but I would like to know how to go about this please. I am really struggling to find answers so I thought I would ask on here. Many thanks James