Poseidon is an AI data infrastructure company focused on sourcing and delivering high-quality real-world data for AI training. It works closely with PIP Labs, an R&D company contributing to the development of the DATA Network, open infrastructure for sourcing, processing and verifying human-generated data. We are looking for a hands-on Security Engineer to support both Poseidon and PIP Labs, owning security across their cloud environments, endpoints, internal systems and data infrastructure. This is a practical ownership role for someone who communicates clearly, moves quickly and is comfortable supporting growing, globally distributed teams. What you'll do Own day-to-day security operations across Poseidon and PIP Labs, including monitoring, alert triage, incident response and remediation. Secure and administer our AWS environments, with some exposure to Google Cloud, and continuously improve our cloud security posture. Manage endpoint security and device controls using tools such as CrowdStrike and Jamf.



Automate recurring security and IT workflows so controls can scale across both organizations without unnecessary manual work. Partner with infrastructure and engineering teams to identify risks, improve configurations and ship practical fixes, including contributing code or pull requests where appropriate. Own dependency hygiene and software supply chain security, ensuring third-party code is appropriately vetted, pinned and continuously monitored for compromise. Support identity, access, device and other internal IT security needs for globally distributed teams. Develop and maintain transparent security procedures, playbooks and documentation. Help strengthen how sensitive and valuable real-world datasets are ingested, stored, accessed and protected across Poseidon, PIP Labs and the broader DATA Network ecosystem. Contribute to security readiness in a high-threat environment, including protection against targeted

📌 Security Engineer (Toronto)
🏢 Poseidon AI
📍 Toronto