Rosman moved to New York City and became an assistant to Elaina Richardson at
Elle magazine. In 2004, she was hired as a staff reporter by
The Wall Street Journal. In 2014, she joined the staff of
The New York Times. She is the author of the memoir,
If You Knew Suzy, published by HarperCollins in 2010. Rosman was a finalist in the feature category for the Gerald Loeb Awards for her story, "The Itsy-Bitsy, Teenie-Weenie, Very Litigious Bikini". She has been written about by the
Harvard Business Review based on her "Survival Guide to Journalism in the Social Media Age". In February 2019, a story by Rosman caused a
Times reporter and photographer to be disinvited from the
Vanity Fair Oscar party.
Dylan Byers, a senior media reporter at
NBC and
MSNBC tweeted, "I have decided not to attend this year's Vanity Fair Oscars party in light of their decision to ban the [
New York Times] on account of their very legitimate reporting. The decision to ban the
Times because of critical reporting is incongruous with journalistic values
Vanity Fair claims to uphold." A
Times reporter, Edmund Lee, also tweeted of the event, "After great reporting by [Katherine Rosman and Brooks Barnes] on
Vanity Fair Oscars party,
Conde Nast saw fit to ban
Times reporters from covering the event. This, from a publication that touts journalism." Others protested the event as well. She also starred in a 2019 documentary called
Secrets of Sugar Baby Dating, directed by Joyce Trozzo in relation to a story she wrote an article called "A 'Sugar Date' Gone Sour" on October 15, 2018, then "The 'Sugar Dater'" on October 19, 2018, followed by more. Rosman continues to write about current events, publishing a fluctuating amount of articles in
The New York Times each month. In January 2023,
The New York Times announced that Rosman would depart from the
Styles section "after a run of enthralling stories" and move to the
Metro section. Since then, Rosman has contributed narratives of individuals, relationships and more within
New York,
Connecticut, and
New Jersey. Rosman was a winner of the Best in Business Award from the Society of American Business Editors in 2018. In 2024, Rosman wrote ''The New York Times's'' most engaged article of the year, and the fourth-most globally. == Personal life ==