Bernie Bickerstaff, the Washington Bullets assistant coach, met with Chicago Bulls General Manager Rod Thorn for 3 1/2 hours yesterday concerning the vacant head coaching job with the Bulls.

Bickerstaff was the third person interviewed by Thorn for the job which became available when Paul Westhead was fired at the end of the regular season.

"I thought it went pretty well," said Bickerstaff of the meeting which took place at the Twin Bridges Marriott. "It was a good basketball discussion. He asked a lot of questions. As far as I know I would think that I'm in the running. He indicated to me that the job was wide open."

Atlanta Hawks Coach Kevin Loughery is believed to be the top candidate for the job and Mike Fratello, Hubie Brown's assistant with the New York Knicks, also is high on Thorn's list.

Thorn was unavailable for comment last night, but said earlier that he hopes to have a coach before the June 28 draft.

Bickerstaff, 38, has been a Bullets assistant for nine seasons, working under K.C. Jones, Dick Motta and Gene Shue.

"I feel I'm ready," Bickerstaff said. "It's just a matter of waiting."