Harbaugh said that Hammock, who was appointed to the role on Thursday, has a very impressive record at college level and is confident that he can make the step up to the NFL.
"Take a look at Thomas's college resume," Harbaugh told the club's official website. "It's impressive, and it's clear he can teach, coach and help players become better.
"He's an impressive person, and we're looking forward to seeing him coach our players."
Hammock's previous role was University of Wisconsin assistant head coach.