The pair are part of a broader shake-up at the show, which includes the addition of Lonnie Quinn as a regular weather anchor.
"CBS Evening News," one of America's longest-running newscasts, is getting a significant overhaul, one that will put the role of a singular and towering Walter Cronkite-like evening news anchor in the rearview mirror.
Just two days after Norah O'Donnell announced that she would depart the show's anchor chair this fall, CBS News executives said she would be replaced by John Dickerson, the network's lead political analyst and the host of an evening CBS News streaming show, and Maurice DuBois, a longtime anchor for the CBS affiliate in New York.
Additionally, the network named Lonnie Quinn, a local weatherman and Mr. DuBois's colleague at WCBS-TV, the first-ever chief weathercaster for "Evening News." Other veteran CBS journalists, like Jim Axelrod, Steve Hartman and Margaret Brennan, are expected to be regular presences on the show, as will other correspondents.
Mr. DuBois and Mr. Quinn will continue in their local roles as well, the network said.
In some ways, the program, with dedicated weather segments and a cast of frequently appearing correspondents, may resemble something closer to a morning show, or a local newscast.
But network executives promise there will be journalistic rigor to the show. Bill Owens, the executive producer of "60 Minutes," will oversee the editorial direction of "Evening News." Additionally, Guy Campanile, a "60 Minutes" producer, will become the nightly show's executive producer.
Wendy McMahon, the chief executive of CBS News, Stations and CBS Media Ventures, said in an interview that the new leadership team represented "the infusion of '60 Minutes' mission and values into the 'CBS Evening News' nightly."
The new format seems to be an acknowledgment of the rapidly changing stature of 6:30 p.m. newscasts, a long-running staple of American television. In the streaming era, the shows' audiences are getting smaller and older, and budgets are getting significantly tighter.
At least for CBS, and at least for now, the days of tapping industry giants like Katie Couric for multimillion-dollar paydays to take over the anchor chair appear to be over. (Lester Holt still anchors "NBC Nightly News," and David Muir remains in command at ABC's "World News Tonight.")
The "Evening News" shake-up is a significant change for a news division in the midst of a volatile presidential election and a pair of wars overseas. Acknowledging the "big changes," Ms. McMahon told employees on Thursday that there would soon be meetings in the news division's New York, Washington, Los Angeles and London bureaus to answer questions about the new format. "We recognize there's a lot here," she wrote in an email.
That's not the only disruption. Ingrid Ciprian-Matthews announced her departure as CBS News president in July, and no replacement has yet been named. (Ms. McMahon said that would come "soon.") The news division's parent, Paramount Global, is on the hunt for $500 million in savings. Job cuts throughout the company, including the news division, are expected this summer. And Paramount is in the midst of a merger with the production company Skydance, a move that will install a new leadership team and may bring further layoffs after the deal closes next year.
In Ms. O'Donnell's five years as anchor of "Evening News," CBS has remained in third place in the ratings, its position for many years, perhaps giving network executives some room to experiment. From April through June, "CBS Evening News" averaged 4.4 million viewers, compared with 5.7 million who watched "NBC Nightly News" and 7.2 million who tuned into "World News Tonight."
The title of "managing editor," a position that has traditionally been given to evening newscast anchors, including Ms. O'Donnell, will also be retired. And "Evening News" will return to New York after it moved to Washington during Ms. O'Donnell's tenure.
Mr. Owens, the "60 Minutes" executive producer, described the changes as "huge, but in some ways, we're going back to the past."
He cited Mr. Cronkite's 1970s "Evening News" broadcasts, when, he said, the anchor spent a minute at the top of the show giving a roll call of all the various far-flung correspondents whom he would be kicking off to over the next half an hour. The show also had two anchors before, including a two-year run when Dan Rather and Connie Chung anchored "Evening News" together in the 1990s.
The updates are also something of a sea change for the culture of CBS News itself. "60 Minutes" has long acted as a separate kingdom within the network, which has spurred rivalries and tensions over the decades. The latest moves bring "60 Minutes" and the news division even closer together, with "60 Minutes" producers in control of the flagship newscast.
"I think this format is going to make people -- and this is our intention -- feel a little bit smarter at the end of a broadcast," Mr. Owens said.