Security Engineer

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 environment, including protection against targeted account compromise, credential theft and sophisticated social-engineering attempts.

What we’re looking for

- Professional experience in cloud security, IT security, security engineering or a closely related role. - Strong practical knowledge of AWS security, including identity and access management, logging, monitoring and secure configuration. - Experience operating endpoint detection and response and device-management tooling. Experience with CrowdStrike and Jamf is strongly preferred. - A track record of automating operational workflows through scripting, APIs, infrastructure tooling, agents or security orchestration. - Comfort handling both security engineering and hands-on internal IT responsibilities. - A proactive, low-ego approach. You identify gaps, propose solutions and follow work through to completion. - Excellent written and spoken English, with the ability to communicate clearly across technical and non-technical teams. - Sound judgment under pressure and a practical approach to balancing security, speed and usability.

Nice to have

- Experience securing data platforms, ingestion pipelines or environments that hold high-value datasets. - Familiarity with Google Cloud or Google Workspace administration and security. - Experience working in Web3, blockchain or another environment exposed to persistent, sophisticated threat actors. - Experience supporting multiple companies, business units or portfolio organizations through a shared security function.

What success looks like

- Security coverage remains reliable and responsive across Poseidon and PIP Labs’ cloud environments, endpoints and employee systems. - High-priority risks and alerts are investigated quickly, communicated clearly and driven through remediation. - Manual work decreases as repeatable security and IT workflows become automated. - Infrastructure and engineering teams across both organizations have a trusted, hands-on security partner who helps them ship safely.