In the sentence our new assistant is very efficient however she often late getting to office word a?

The sentence "Our new assistant is very efficient, however she is often late getting to the office" has a couple of issues:

1. Punctuation: There should be a comma after "efficient" to separate the two clauses.

2. Grammar: The phrase "she often late" is grammatically incorrect. It needs a verb to be complete.

Here's a corrected version:

"Our new assistant is very efficient, however, she is often late getting to the office."