O, The Oprah Magazine has announced several new hires, filling out the editorial department under new editor-in-chief Susan Casey.

Among the new hires are former Marie Claire executive editor Lucy Kaylin, who has been named deputy editor; Patrick Mitchell, who is taking the role of design director; former Publishers Weekly editor-in-chief Sara Nelson, who has been named books director; former Prevention senior editor Tyler Graham, who will be health and environment editor and Jennifer Rainey Marquez, formerly of Women's Health, who will take on the role of senior editor.

"As we prepare for O's tenth anniversary year in 2010, I couldn't be more pleased that Lucy, Patrick, Sara, Tyler and Jennifer are joining our team," said Casey, who joined the magazine earlier this summer. "They all come to the magazine with incredible talent and experience in their respective areas and I'm confident they will be a great asset to O as we move into our next phase of growth."

O also named Dr. Mehmet Oz a contributing editor. He will write a regular health column for the magazine starting with the October issue. The magazine also said that features director Pat Towers will be retiring this month, although she will continue to work on special projects for the magazine.

And in other Oprah Winfrey news, Sirius XM has announced the launch of Winfrey's exclusive 24/7 Sirius XM radio station. Starting on Monday, episodes of "The Oprah Winfrey Show" will now be broadcast on satellite radio the morning after they air in syndication on TV. The channel will also replay classic "Oprah Show" episodes as well as shows hosted by Gayle King, Dr. Oz, Maya Angelou and sex therapist Dr. Laura Berman.

After the jump, the full release about the O hires, as well as longer bios.

Earlier: Two Magazines Lose Top Talent After Short Tenures

O, THE OPRAH MAGAZINE ANNOUNCES KEY EDITORIAL HIRES AND NAMES DR. MEHMET OZ AS CONTRIBUTING EDITOR

NEW YORK, September 9, 2009 -- Susan Casey, editor in chief of O, The Oprah Magazine, today announced several key hires to the editorial team: Lucy Kaylin has been named deputy editor; Patrick Mitchell, design director; Sara Nelson, books director; Tyler Graham, health and environment editor and Jennifer Rainey Marquez, senior editor. In addition, Dr. Mehmet Oz will be joining as a contributing editor. All editorial hires will start in their new roles later this month and will report to Casey. Dr. Oz’s first column will appear in the October issue, on newsstands September 15.

Lucy Kaylin will become deputy editor of O, The Oprah Magazine. Kaylin comes from Marie Claire, where she held the position of executive editor since July 2006. Prior to Marie Claire, Kaylin served as features editor of GQ, where she started in 1987 as an editorial assistant. Kaylin began her career at Little, Brown and Company, and she is the author of the books The Perfect Stranger: The Truth about Mothers and Nannies (Bloomsbury, 2007) and For the Love of God: The Faith and Future of the American Nun (William Morrow, 2000).

Patrick Mitchell, appointed design director, is the founder and creative director of PlutoMedia, an editorial design studio whose clients include Barnes & Noble, DirecTV and Disney. Before launching PlutoMedia, Mitchell served as design director for Nylon magazine—for which he was a National Magazine Award finalist in 2006. As the founding design director of Fast Company, Mitchell was the winner of the 2000 National Magazine Award for Excellence in Design.

Named O's books director, Sara Nelson was formally the editor in chief of Publishers Weekly from 2005 to 2009, during which time she overhauled the 135-year-old magazine and oversaw the development of its Web site. Nelson has previously written a publishing column for the New York Observer and her freelance pieces have appeared in the New York Times and The Wall Street Journal. In 2003, she published her memoir/reading guide, So Many Books, So Little Time, which became a BookSense bestseller.

O, The Oprah Magazine's features director, Pat Towers, is retiring this month. However, she will continue to work on special projects for the magazine.

Tyler Graham will join the magazine as health and environment editor. Previously he served as senior editor at Prevention, overseeing all of the nutrition content. Before joining Prevention, Graham held several editorial positions at Best Life magazine from 2005-2009. Graham has been nominated for two National Magazine Awards, in 2009 for Magazine Section and in 2007 for Public Interest.

Jennifer Rainey Marquez will join O as senior editor. Previously she was at Women's Health where she was the magazine's first full-time health editor. Prior to Women's Health, Marquez served as health editor for Women’s Day and was part of the initial launch team for All You. Marquez is a graduate of the University of Georgia where she received her B.A. in Journalism.

Also joining O, The Oprah Magazine is new contributing editor, Dr. Mehmet Oz. Beginning with the October issue, Oz will serve as the magazine's regular health columnist. He has been the health expert on "The Oprah Winfrey Show" for the past five years and launches his own syndicated talk show, "The Dr. Oz Show," this month. As Vice-Chairman and Professor of Surgery at the New York Presbyterian Hospital/Columbia University Media center, he directs the Cardiovascular Institute. Dr. Oz has co-authored five New York Times bestsellers and is also the host of a daily talk show on Sirius XM radio's "Oprah Radio."

"As we prepare for O's tenth anniversary year in 2010, I couldn't be more pleased that Lucy, Patrick, Sara, Tyler and Jennifer are joining our team," said Casey. "They all come to the magazine with incredible talent and experience in their respective areas and I'm confident they will be a great asset to O as we move into our next phase of growth."

Casey added, "I know that our readers will respond very favorably to having Dr. Oz in our pages on a monthly basis. His vast knowledge of health and wellness is a topic that resonates with O’s audience and we’re pleased to have him on board as a regular contributor."