Our vision: a safe, secure and prosperous Canada, through trusted intelligence and advice. csis is at the forefront of Canada's national security system. our role is to investigate activities suspected of constituting threats to the security of Canada and to report on these to the government of Canada. we may also take measures to reduce threats to the security of canada in accordance with well-defined legal requirements and ministerial direction. mandate csis is canada’s security and intelligence service. its role is to investigate activities suspected of constituting threats to the security of canada and to report these to the government of Canada. csis may also take measures to reduce threats to the security of Canada in accordance with well-defined legal requirements and ministerial direction. csis collects and analyzes threat-related information, which is typically disseminated to government partners through intelligence reports and other intelligence products. key threats include terrorism, the proliferation of weapons of mass destruction, espionage, foreign interference and cyber-tampering affecting critical infrastructure.