Collocations for competent - adj.

be, feel, look, seem
become
make sb
A year of college had made her more socially competent.

consider sb, regard sb as
He was not considered competent to teach seven-year-olds.

extremely, fairly, very, etc.
highly
a small number of highly competent officials

fully, perfectly
mentally
She was mentally competent and she had the capacity to decide for herself.
mentally competent to stand trial (AmE,law)

culturally, socially, technically

in
She is competent in five languages.

Competent is used with these nouns:
authority, handling, lawyer, management, professional, reader, solicitor, teacher