A prominent adviser to former Liberal prime minister Jean Chrétien will be helping the federal Greens in the upcoming election campaign, the party confirmed to iPolitics.

On Friday morning, The Globe and Mail’s Robert Fife reported on Twitter that Warren Kinsella will be “helping out” the party and leader Elizabeth May in its “war room” during the lead-up to this fall’s federal vote.

When asked by iPolitics, Green Party spokesperson John Chenery confirmed that Kinsella will join the party’s campaign to “help with strategic response and opposition research in support of the leader and our candidates.”

However, Chenery noted that the party doesn’t employ a “war room.”

Kinsella rose to prominence during the Chrétien government in the 1990s and early 2000s, serving as a key adviser and campaign staffer. Most notably, he had stints as a special adviser to Chrétien and chief of staff to then-public works minister David Dingwall.

He would then go on to hold top posts in the successful election campaigns for the Ontario Liberals under the leadership of Dalton McGuinty, who served as premier from 2003 to 2013. Kinsella also briefly served as an adviser to ex-Liberal leader Michael Ignatieff.

However, he has been quite vocal in his criticism of Prime Minister Justin Trudeau in recent years.

Kinsella is the president of the Toronto-based Daisy Consulting Group.