Security Engineer

Summary

Poseidon is an AI data infrastructure company focused on sourcing and delivering high-quality real-world data for AI training. The Security Engineer will own day-to-day security across cloud environments, endpoints, internal systems and data infrastructure for Poseidon and PIP Labs, while improving security operations, automation, identity controls and protection of sensitive datasets.

Responsibilities

• 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

Skills

• 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
• 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
• Experience with CrowdStrike and Jamf is strongly preferred
• 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

Qualifications

Must Haves

• 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
• 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 Haves

• Experience with CrowdStrike and Jamf is strongly preferred
• 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

Benefits

• Remote work arrangement