Securing their head coaching and front office leadership, the San Francisco 49ers on Wednesday extended coach George Seifert's contract two years, and named Carmen Policy the team's president.

The 49ers also changed the logo on the side of the team's helmets to one that features "49ers" in large white letters. The 49ers' old logo was the white letters "SF" in a red circle outlined in black.Seifert, who coached the 49ers to a Super Bowl in his first season as coach and led them to the NFC Championship game this past season, had his contract extended through the 1993 season.

Seifert, 51, was entering the final year of a three-year contract he signed after taking over the team's head coaching duties from Bill Walsh in 1989.

"My relationship with George during his tenure with the 49ers has been superb," 49ers owner Edward J. DeBartolo Jr. said Wednesday at a news conference at the team's training facility. "In my opinion, he is the best head coach in the NFL."

Policy, who had served as the team's executive vice president and general counsel the past two seasons, will be responsible for the day-to-day operations of the NFL franchise, and will handle matters relating to the NFL.

"He has the autonomy to make decisions and be involved," DeBartolo said. " . . . It's important to have one man there on the scene to handle everything that is an NFL franchise.

"It's been a long time coming. We've been talking about this for a couple of years."

As the team's general counsel, Policy had been working for the 49ers out of his law office in Youngstown, Ohio. Policy plans to move to the San Francisco area by the time training camp begins next July.

"I think being here (in the San Francisco area) on a full-time basis I can more readily and regularly bring into play the DeBartolo style and the owner's overall concept in how this organization should operate," Policy said.

Policy served as DeBartolo's personal attorney and advisor prior to joining the 49ers' staff in 1983.

He was named an executive vice president in 1989 when he assumed the duties of handling all the 49ers front office and league relations.

DeBartolo said that naming Policy as the 49ers' president will not affect his involvement with the franchise.

"I will not do anything different than I normally do," he said. "This enables me to have someone on the scene every day. What (the move) does is bring an extension of me (to the organization) on an everyday basis."

Policy said Wednesday that NFL Commissioner Paul Tagliabue had requested he become more involved in the league's committee work.

DeBartolo said the logo change was an attempt to modernize the team's image. The 49ers had gone with the overlapping "SF" logo since 1962.

"The San Francisco 49ers will always be, but the team is known as the 49ers," DeBartolo said. "We just wanted to make things a little more modern."

The logo was designed by the creative division of NFL Properties and has been tested for television.