OT Security Engineer: Guard Frontier AI Compute

Fluidstack; United States; Remote; USD 150,000 - 210,000; Full time

Job summary

Fluidstack in the United States is seeking a Security Engineer to join the OT security team. You will secure substations, SCADA, and controls systems in production, and help build defensible architectures across the gigawatt-scale estate.

You'll partner with hardware, controls, and site teams to embed security into deployment pipelines, tune detection and response, and advance supply chain security with industry standards.

Qualifications

• You've secured substations, SCADA, or controls systems in production.
• You've threat modeled OT environments and turned the results into segmentation and controls.
• You think in the Purdue Model and know when to break it, because virtualized PLCs and software-defined OT don’t always fit the reference architecture.
• You've worked hands-on with common OT security tooling (Claroty, Nozomi, Dragos, or similar).
• You know BMS, EPMS, and cooling systems well enough to hold your own with the engineers who run them.
• You've moved security forward in engineering teams that don’t report to you, through consultation and design review rather than mandate.
• Bonus: NERC CIP or IEC 62443 depth. Securing virtualized or containerized industrial control. Commissioning-phase security work at construction sites.

Responsibilities

• Threat model OT systems and environments across the fleet: SCADA platforms, BMS and EPMS, cooling and power systems, and the sensor networks that feed them.
• Design the architecture and segmentation that keeps a gigawatt-scale OT estate defensible: network zones, remote access paths, and the IT/OT boundary.
• Forward-deploy with controls engineering to secure operational deployments, from PLC code pipelines and virtualized controllers to the SCADA layer above them.
• Serve as the security consultant to power, controls, commissioning, and site teams as new capacity energizes, turning review requests into guidance teams can actually deploy.
• Work with the detection and response org to understand and tune OT-environment detection coverage, and respond alongside incident responders when attacks reach OT infrastructure.
• Lead engagements with hardware OEM’s on product security requirements and use cases such as firmware security, tamper evidence, and counterfeit detection to address supply chain risk.

Skills

OT security

Threat modeling

Purdue Model

Industrial protocols

Security tooling

Hardware security

Networking security

Job description

Fluidstack in the United States is seeking a Security Engineer to join the OT security team. You will secure substations, SCADA, and controls systems in production, and help build defensible architectures across the gigawatt-scale estate.

You'll partner with hardware, controls, and site teams to embed security into deployment pipelines, tune detection and response, and advance supply chain security with industry standards.