[3] During his technical studies at the CEGEP, he worked on the issues of biofuels and became involved in an advocacy campaign to finance a project of design of electric vehicles for the students of his department.

In 2011, Tyrrell enrolled in an environmental science program at Concordia University in Montreal, focusing his studies to better understand the problems of pollution, the impacts of climate change, and issues related to the environment.

[7] Following the victory of Thomas Mulcair, Tyrrell stepped back from the federal political scene and turned his commitment to the student movement.

Bernard Drainville, former member of the National Assembly of Quebec, accused Tyrell of "adopting Putin’s rhetoric ... and being his accomplice", while CAQ Deputy Christopher Skeete noted this was a "horrible insult to the Jewish community".

[14] Alex Tyrrell argues that activism for peace was always carried by the left and the Green Party both in Canada and in Quebec and his position reflects that.

[15] In July 2022, Tyrrell was expelled from the federal Green Party while preparing to launch a leadership bid, in part due to the controversy surrounding his comments about the war in Ukraine.

He is currently appealing the decision[16] Following the student protests of 2012, Tyrrell became interested in provincial politics, becoming involved with the Green Party of Quebec by submitting his candidacy in the riding of Jacques-Cartier.

Tyrrell campaigned on the slogan "Uniting the PVQ", a direct reference to the internal divisions that he saw as preventing the party from advancing in Quebec politics.

[18] Tyrrell proposed to broaden the party's environment-oriented agenda to present a more comprehensive platform that called for massive investments in public services such as health and education.