WALTHAM — Doc Rivers announced Tuesday that the Celtics have agreed to a two-year contract with second-round pick Luke Harangody. Terms of the deal were not disclosed. The Notre Dame alum met briefly with the media following the Shaquille O’Neal press conference.

“It’s a great feeling to have a little job security, especially guaranteed,” Harangody said. “It helps me sleep easier at night. And to sign the contract is also a great feeling as well.”

The 52nd pick of the 2010 draft, Harangody joins a star-filled front court in Boston. However, the prospect of playing with Shaquille O’Neal does not intimidate the former All-Big East player.

“The first couple of times seeing Shaq today, you are a little in awe, a little starstruck,” Harangody said of the three-time NBA Finals MVP. “At the same time, you just have to come to the gym every day. We’re teammates now, no matter who is on the court.”

There were questions about Harangody’s shooting, which some feel led to a drop in the draft. He quickly impressed, though, with an outstanding showing at the Summer League in Orlando, leading the Celtics for the week with 16.8 points per game, while shooting 47.1% from the floor and 50.0% on 3-point attempts.

“I’ve been working in the gym all summer, working on the 3-point ball, the NBA 3-point ball,” Harangody said. “It’s a big deal. I just got comfortable out there, it showed in the the summer league. It surprised a lot of people.”

As for his role with the Celtics in 2010, the soon-to-be rookie made no predictions.

“Wherever I fit in I fit in,” Harangody said.