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 clear 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 workplace, including protection against targeted

📌 Security Engineer (Toronto)
🏢 Poseidon AI
📍 Toronto