Quirk, Bosio and McKay will join hitting coach Rudy Jaramillo, third-base coach Pat Listach and bullpen coach Lester Strode, who are holdovers from Mike Quade's staff. Quade was dismissed after a 71-91 season, and Sveum was named the Cubs' 52nd manager on Nov. 18.
Mike Borzello and Franklin Font also will serve as Major League staff assistants. Borzello will work with the catchers and be involved in advance scouting, while Font, who was the Cubs' Minor League infield coordinator, will assist Jaramillo.
Sveum met with the coaching staff in Arizona on Thursday to go over how he wants things run in his first Spring Training camp. The staff also discussed the 40-man roster.
"We hunkered down and spent about six hours in a room, and we just got a lot of things done and ironed out ... how we're going to run things," Sveum said.
Heading into the Winter Meetings, all of Sveum's staff had been set except for McKay, 61, who has spent the last 16 seasons as the Cardinals' first-base coach. The 2012 season will be McKay's 27th season as a big league coach. He has been a member of three World Series champion staffs -- 1989 in Oakland as well as '06 and '11 in St. Louis.
Sveum said Friday he wasn't aware McKay was not returning to the Cardinals until late in the process.
"I'm just glad Dave got a hold of me and let me know he was out there," Sveum said. "He's a huge asset to any team."
McKay was a coach on the Athletics' staff when Sveum played for Oakland, and will be an outfield and baserunning instructor.
Sveum also was enthused to get Quirk, 57, on his staff. He joins the Cubs with 18 years of Major League coaching experience with three teams, including 12 seasons as a big league bench coach with the Royals (1996-2001) and Rockies (2003-08). The former big league catcher played for eight teams during his 18-year Major League career (1975-92) and was a member of the 1985 World Series champion Royals.
"He really wanted to get back in the mix of things in the dugout," Sveum said. "He's a huge asset to me."
The addition of Quirk will move Listach, 44, to third-base coach, a position he held with the Nationals.
"Everybody has a lot of good things to say about how he coaches third," Sveum said. "He's enthusiastic, he does a good job, he's very prepared."
Bosio, 48, begins his third stint as a big league pitching coach, previously coaching in the Majors for the Rays in 2003 and the Brewers in '09. He became the Brewers' advance scout following the '09 season and remained in that role until being named pitching coach for Triple-A Nashville in '11.
Sveum said Bosio can not only teach pitchers mechanics, but also help with the "psychology part" -- going over the mental part of the game and pitch sequences.
"Chris is a very hard-working guy, no-nonsense-type guy who will get down and dirty with each and every pitcher to get the best out of them," Sveum said. "Most important, he's good at understanding how to get hitters out."
Bosio pitched 11 seasons for the Brewers and Mariners and was Sveum's teammate with Milwaukee.
Jaramillo, 61, enters his third season with the Cubs and 18th straight at the Major League level as a hitting coach. Strode, 53, enters his 24th season in the Cubs' organization and sixth at the Major League level on the coaching staff.
Borzello, 41, joins the Cubs with 16 years of experience with Major League clubs. He spent the past four seasons with the Dodgers as their bullpen catcher, a stint that followed 12 years in the Yankees' organization starting in 1996.
Font, 34, returns for his 18th season in the Cubs' organization and his first at the Major League level. He spent the last three years as the Cubs' Minor League infield coordinator and has a good relationship with shortstop Starlin Castro.
"It's a big asset for us," Sveum said of Font. "The guy is due diligent with his work. It's hard to outwork the guy. He's very excited to have his first stint in the big leagues."
Carrie Muskat is a reporter for MLB.com. She writes a blog, Muskat Ramblings, and you can follow her on Twitter@CarrieMuskat. This story was not subject to the approval of Major League Baseball or its clubs.