This sentence contains a dangling modifier.
As a Principal Technical Editor/Writer for Alpha Communications, with over 12 years of experience, the internship would provide an opportunity to work with technical documents outside my familiar "comfort zone" of technical manuals.
I think this is in passive voice.
Would this work to fix it?
The internship would provide me, a Principal Technical Editor/Writer for Alpha Communications, with over 12 years of experience,an opportunity to work with technical documents outside my familiar "comfort zone" of technical manuals.
Are you already the "Principal Technical Editor/Writer for Alpha Communications"?
Yes, the original sentence contains a dangling modifier. The phrase "with over 12 years of experience" is modifying the noun phrase "As a Principal Technical Editor/Writer for Alpha Communications," but it is not clear what it is meant to modify because of its placement.
To fix this issue, you can rephrase the sentence by repositioning the modifier so that it directly modifies the noun it is intended to describe. Your suggested rephrased sentence is a good attempt to correct the problem. Here's the revised sentence with the modifier properly placed:
"As a Principal Technical Editor/Writer for Alpha Communications with over 12 years of experience, the internship would provide me an opportunity to work with technical documents outside my familiar 'comfort zone' of technical manuals."
This revised sentence clarifies that it is you, as the Principal Technical Editor/Writer with over 12 years of experience, who would have the opportunity to work with technical documents outside your familiar "comfort zone."