Below is a list of examples of how not work with distressing material. Working in this way below would highly likely lead you to experiencing vicarious trauma:
Work to a tight deadline
Work with the material for extended periods of time
Work on distressing material on your own without any significant break
Don't make your manager or colleagues aware of what you're working on
Work solely on this material, without having another project or collection to work on
Read secondary resources about the topic or collection you're working on outside of work and/or for long periods of time e.g. use google or search engines excessively
Carry out work while working from home
Forget or avoid telling your family, friends or support network what you're working on
Have no tangible payoff at the end
If you think your way of working with distressing material mirrors the list above, please speak to your manager as soon as possible.