In order to say
My job must involve using computers,
how would I use the present participle of use?
Is this correct?
Mein Beruf muss Computer benutzen einschließen.
German uses the present participle very scarcely compared to English. The only thing it is used for on a regular basis is as an adjective or an adverb.
For all other uses of the English present participle (or gerund for that matter), my advice is to avoid a direct transfer to German. It will most likely be unidiomatic (though understandable). The options you have are using a noun or making a dependent clause with the activity (or, as @Toscho suggested in a comment to the other answer, an infinitive-construction). Which one is better depends on the particular case. I'll use 3 different intro-sentences but they are interchangeable.
The first version is the best, the third one is awful.
In this particular case, depending on what exactly the context is, another phrasing is possible.
I'd say (tersely)
This wording contains "use of computers" as a noun.