Why Elysium?
Elysium Law combines high-stakes litigation expertise with proactive strategic counsel. Whether you need guidance on complex corporate governance, defense against government actions, or advocacy for vital community interests, we deliver focused, partner-led legal solutions tailored to achieve your most secure outcome.
Helping businesses grow and bringing justice across Canada. One case at a time.
Guillaume Sirois, Founder of Elysium
“After years of working to uphold the rule of law—from defending governments to investigating them, and from coast to coast taking all levels of governments to court—I wanted to build a firm that encompasses the ideals of defending the rule of law with the highest standards of integrity, excellence, and unwavering advocacy.”
Guillaume Sirois in the news
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A group of citizens in Sept-Îles, represented by their counsel, Guillaume Sirois, filed an injunction to halt the planned demolition of the City Hall building. The Superior Court agreed to hear the urgent motion before the scheduled demolition start date, securing a temporary standstill from the City. The citizens' suit argues that the decision to demolish was improperly timed during an electoral period, preventing newly elected officials from weighing in. Furthermore, during the proceedings, Guillaume Sirois successfully pleaded for the withdrawal of the City's original counsel due to a potential conflict of interest, forcing the municipality to secure a new legal team for the defense of the demolition decision.
Read full article (in French) here. -
During the cross-examination of Prime Minister Justin Trudeau at the Commission of Inquiry into Foreign Interference, Guillaume Sirois, counsel for the Russian Canadian Democratic Alliance (RCDA), focused on the role of foreign propaganda in domestic events. Mr. Sirois presented multiple headlines from the Russian state-funded broadcaster, Russia Today (RT), relating to the 2022 'Freedom Convoy' protests. This line of questioning led PM Trudeau to testify that anti-vaccination messages during the pandemic and convoy were "amplified by Russian propaganda," and that his government had observed RT funding bloggers and right-wing personalities to amplify messages aimed at destabilizing democracies.
Read full article here.
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A US Department of Justice indictment alleging that a Canadian-founded far-right media outlet received $10 million from a Russian entity to interfere in the US election was brought before Canada's Public Inquiry into Foreign Interference. Counsel for the Russian Canadian Democratic Alliance (RCDA), Guillaume Sirois, formally asked the Commission to examine this new evidence. Mr. Sirois argued that the case falls directly within the inquiry's mandate because the time frame of the alleged contract (March 2021 – February 2022) overlapped with Canada's 2021 federal election. He stressed that if a Kremlin agent (RT) was paying a Canadian influencer who then promoted a specific Canadian political party without disclosing the financial relationship, the matter is directly relevant to the inquiry's scope.
Read full article here. -
During the public hearings of the Commission of Inquiry into Foreign Interference, a crucial conflict emerged between the government's claimed workload and its duty to disclose secret documents. While Public Safety Minister Dominic LeBlanc affirmed that "Ottawa's workload cannot be an obstacle to transparency," a Justice Department letter revealed the extensive time (200 hours for 13 documents) required for review, suggesting the task was "untenable." In response, the lawyer representing the Russian Canadian Democratic Alliance, Guillaume Sirois, pressed the Commission on the fact that the government's explanation failed to confirm whether the public interest in disclosure had even been considered, underscoring the vital need for greater transparency and accountability from federal security agencies.
Read full article (in French) here.