After Radio-Canada appointed Hébert to cover federal politics on Parliament Hill, she worked as bureau chief for Montreal's Le Devoir and La Presse.

She has written columns appearing in The London Free Press, the Ottawa Citizen, and the National Post, and currently in Le Devoir, Metro, and the Toronto Star.

[4] In the summer of 1995, Hébert broke the story in La Presse that the 1995 Quebec referendum question's guarantee of an offer of partnership with the rest of Canada before declaring sovereignty following a "Yes" vote was a sham.

She appears frequently on CBC Television's The National as a member of the At Issue political panel hosted by Rosemary Barton alongside fellow panelists Andrew Coyne and Althia Raj.

In June 2006, Hébert took two months' leave of absence from the Toronto Star to write her first book, French Kiss: Stephen Harper's Blind Date with Quebec (Knopf Canada, February 2007, ISBN 978-0-676-97907-7).

[1] In September 2014, her second book was released, The Morning After: The 1995 Quebec Referendum and the Day that Almost Was (in French, Confessions post-référendaires: Les acteurs politiques de 1995 et le scénario d'un oui).