I am applying for a new job, and I am rubbish at writing CVs, so I often have a look at the examples and templates on-line, and it says that you should use not use personal pronouns in these examples. For example
I Solved an IT issue
You should use:
Solved an IT issue
Why is it frowned upon or bad to use personal pronouns in a CV/Resume?
EDIT: Is it acceptable to use I once or twice, or would you advise against it completely?