Yes, he did but he also testified that attempts to meddle in American elections have been going on since the Cold War. He was asked about WHY nothing was said or done prior to October, he answered that "they" thought that would be adequate time.
 Jeh also testified that there were a number of other countries other then just Russia who have attempted or tried to interfere with our elections.  
Nothing was said by him to indicate that Trump had anything to do with the Russian's interference. 
Maybe Obama needs to be called to testify why 
Apparently, it was up to the states, 21 or so, who were warned to acknowledge who they are (targets of the election hacking) to say who they are.
Furthermore, NO EVIDENCE  has been found that what Russia or other countries did changed the outcome of the election.
What has happened by the meddling is that people's confidence in computer activity is eroding and that the meddling has served its purpose by causing so much valuable time being spent on it.