{"schemaVersion":"jobsearcher.job.v1","id":"a13f3c0800438285662c09d4","url":"https://jobsearcher.com/jobs/a13f3c0800438285662c09d4","canonicalUrl":"https://jobsearcher.com/jobs/a13f3c0800438285662c09d4","title":"Security Engineer, OT","description":"Location\n\nSan Francisco, CA; Austin, TX; New York, NY; Seattle, WA; U.S. Remote\n\nEmployment Type\n\nFull time\n\nLocation Type\n\nOn-site\n\nDepartment\n\nSecurity & Corp IT\n\nCompensation\n$275K – $344K\n\nTo provide greater transparency to candidates, we share base pay ranges for all US-based job postings. Our compensation package includes base salary, equity for all full time roles, benefits, and, for applicable roles, commissions plans.\n\nThis range reflects a good-faith estimate based on the applicable pay scale, the range previously established for this role, the compensation of individuals currently in equivalent positions, and/or the budgeted amount for the position. Actual compensation may vary based on experience, qualifications, and other factors.\n\nWe welcome compensation discussions if this range doesn't meet your requirements. Outstanding candidates may be eligible for adjusted terms, plus meaningful equity that ensures you benefit directly from the company's long-term performance.\n\nTotal compensation may also include equity in the form of restricted stock units.\nAbout Fluidstack\n\nWe exist to make humanity more free. For most of human history, you farmed or you starved. Technology gave people more time for the things they wanted to do, instead of things they had to do. Powerful AI will be the biggest lever for human choice we've ever built - but only if models are aligned with what humanity actually wants. There are groups building AI who don't share these goals. Whoever deploys frontier compute infrastructure fastest will decide whether AI expands human freedom or shrinks it.\n\nWe're singularly focused on delivering 10 to 100s of GWs of compute faster than anyone else, rethinking every layer of the stack. We acquire power, design and build data centers, and operate them - with teams spanning hardware and software. Speed and scale are our key differentiators. Come be a part of building civilization-scale infrastructure for AI.\n\nWe hire people who care deeply about this problem space. If that is you, please apply!\n\nHow We Operate\n\nBe a barrel. Full autonomy. Own things end to end, take on scope without being asked, no permission required to operate outside your core role.\n\nInsane urgency. We drive everything forward as fast as possible.\n\nReason from first principles. Challenge every assumption. Zero analogy thinking, no egos, the best idea wins.\n\nLove of the game. The frontier of AI is the most interesting problem of our time. We put in long hours at high intensity to push the frontier forward.\n\nBuild something that actually matters. If you're going to spend your time, spend it on something that matters to the world.\n\nThe Security Team\n\nExamples of key problems the team is working on\n\nYou're securing the frontier of AI. The model weights training on our infrastructure are the most valuable and most targeted artifacts in technology, and we're standing up the compute to hold them faster than anyone ever has. A breach isn't a leak, it's the frontier walking out the door.\n\nBuild the entire security program from scratch. Most leaders inherit someone else's system and spend a career patching it. Here you own it end to end, bare metal to boardroom, as we scale across continents.\n\nYour threat surface is measured in gigawatts. The customers running on our infrastructure are building the most consequential technology in human history, and being responsible for the physical and logical security of that work makes everything else feel small.\n\nRole Scope\n\nThreat model OT systems and environments across the fleet: SCADA platforms, BMS and EPMS, cooling and power systems, and the sensor networks that feed them.\n\nDesign the architecture and segmentation that keeps a gigawatt-scale OT estate defensible: network zones, remote access paths, and the IT/OT boundary.\n\nForward-deploy with controls engineering to secure operational deployments, from PLC code pipelines and virtualized controllers to the SCADA layer above them.\n\nServe as the security consultant to power, controls, commissioning, and site teams as new capacity energizes, turning review requests into guidance teams can actually deploy.\n\nWork with the detection and response org to understand and tune OT-environment detection coverage, and respond alongside incident responders when attacks reach OT infrastructure.\n\nLead 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.\n\nWhat We're Looking For\n\nThe below is a starting point. We always make space for exceptional people, so if you don't fit this role exactly, tell us where you would.\n\nYou've secured substations, SCADA, or controls systems in production: Ignition or comparable platforms, PLCs, relays, and the industrial protocols beneath them.\n\nYou've threat modeled OT environments and turned the results into segmentation and controls that operators could live with.\n\nYou 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.\n\nYou've worked hands-on with common OT security tooling (Claroty, Nozomi, Dragos, or similar) and know what each class of tool can and can't see.\n\nYou know BMS, EPMS, and cooling systems well enough to hold your own with the engineers who run them.\n\nYou've moved security forward in engineering teams that don't report to you, through consultation and design review rather than mandate.\n\nBonus: NERC CIP or IEC 62443 depth. Securing virtualized or containerized industrial control. Commissioning-phase security work at construction sites.\n\nWe are committed to pay equity and transparency.\n\nFluidstack is an Equal Employment Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability and protected veterans’ status, or any other characteristic protected by law. Fluidstack will consider for employment qualified applicants with arrest and conviction records pursuant to applicable law.\n\nYou will receive a confirmation email once your application has successfully been accepted. If there is an error with your submission and you did not receive a confirmation email, please email careers@fluidstack.io with your resume/CV, the role you've applied for, and the date you submitted your application- someone from our recruiting team will be in touch.\n\nCompensation Range: $275K - $344K","company":"FluidStack","rawCompany":"fluidstack","city":"Millbrae","state":"CA","isRemote":false,"isActive":true,"createdAt":"2026-10-24T08:22:46.351Z","occupations":[{"code":"15-1299.05","title":"Information Security Engineers","slug":"information-security-engineers"},{"code":"15-1299.08","title":"Computer Systems Engineers/Architects","slug":"computer-systems-engineers-architects"},{"code":"15-1212.00","title":"Information Security Analysts","slug":"information-security-analysts"}],"industries":[{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"},{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"},{"code":"513210","title":"Software Publishers","slug":"software-publishers"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Security Engineer, OT","description":"Location\n\nSan Francisco, CA; Austin, TX; New York, NY; Seattle, WA; U.S. Remote\n\nEmployment Type\n\nFull time\n\nLocation Type\n\nOn-site\n\nDepartment\n\nSecurity & Corp IT\n\nCompensation\n$275K – $344K\n\nTo provide greater transparency to candidates, we share base pay ranges for all US-based job postings. Our compensation package includes base salary, equity for all full time roles, benefits, and, for applicable roles, commissions plans.\n\nThis range reflects a good-faith estimate based on the applicable pay scale, the range previously established for this role, the compensation of individuals currently in equivalent positions, and/or the budgeted amount for the position. Actual compensation may vary based on experience, qualifications, and other factors.\n\nWe welcome compensation discussions if this range doesn't meet your requirements. Outstanding candidates may be eligible for adjusted terms, plus meaningful equity that ensures you benefit directly from the company's long-term performance.\n\nTotal compensation may also include equity in the form of restricted stock units.\nAbout Fluidstack\n\nWe exist to make humanity more free. For most of human history, you farmed or you starved. Technology gave people more time for the things they wanted to do, instead of things they had to do. Powerful AI will be the biggest lever for human choice we've ever built - but only if models are aligned with what humanity actually wants. There are groups building AI who don't share these goals. Whoever deploys frontier compute infrastructure fastest will decide whether AI expands human freedom or shrinks it.\n\nWe're singularly focused on delivering 10 to 100s of GWs of compute faster than anyone else, rethinking every layer of the stack. We acquire power, design and build data centers, and operate them - with teams spanning hardware and software. Speed and scale are our key differentiators. Come be a part of building civilization-scale infrastructure for AI.\n\nWe hire people who care deeply about this problem space. If that is you, please apply!\n\nHow We Operate\n\nBe a barrel. Full autonomy. Own things end to end, take on scope without being asked, no permission required to operate outside your core role.\n\nInsane urgency. We drive everything forward as fast as possible.\n\nReason from first principles. Challenge every assumption. Zero analogy thinking, no egos, the best idea wins.\n\nLove of the game. The frontier of AI is the most interesting problem of our time. We put in long hours at high intensity to push the frontier forward.\n\nBuild something that actually matters. If you're going to spend your time, spend it on something that matters to the world.\n\nThe Security Team\n\nExamples of key problems the team is working on\n\nYou're securing the frontier of AI. The model weights training on our infrastructure are the most valuable and most targeted artifacts in technology, and we're standing up the compute to hold them faster than anyone ever has. A breach isn't a leak, it's the frontier walking out the door.\n\nBuild the entire security program from scratch. Most leaders inherit someone else's system and spend a career patching it. Here you own it end to end, bare metal to boardroom, as we scale across continents.\n\nYour threat surface is measured in gigawatts. The customers running on our infrastructure are building the most consequential technology in human history, and being responsible for the physical and logical security of that work makes everything else feel small.\n\nRole Scope\n\nThreat model OT systems and environments across the fleet: SCADA platforms, BMS and EPMS, cooling and power systems, and the sensor networks that feed them.\n\nDesign the architecture and segmentation that keeps a gigawatt-scale OT estate defensible: network zones, remote access paths, and the IT/OT boundary.\n\nForward-deploy with controls engineering to secure operational deployments, from PLC code pipelines and virtualized controllers to the SCADA layer above them.\n\nServe as the security consultant to power, controls, commissioning, and site teams as new capacity energizes, turning review requests into guidance teams can actually deploy.\n\nWork with the detection and response org to understand and tune OT-environment detection coverage, and respond alongside incident responders when attacks reach OT infrastructure.\n\nLead 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.\n\nWhat We're Looking For\n\nThe below is a starting point. We always make space for exceptional people, so if you don't fit this role exactly, tell us where you would.\n\nYou've secured substations, SCADA, or controls systems in production: Ignition or comparable platforms, PLCs, relays, and the industrial protocols beneath them.\n\nYou've threat modeled OT environments and turned the results into segmentation and controls that operators could live with.\n\nYou 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.\n\nYou've worked hands-on with common OT security tooling (Claroty, Nozomi, Dragos, or similar) and know what each class of tool can and can't see.\n\nYou know BMS, EPMS, and cooling systems well enough to hold your own with the engineers who run them.\n\nYou've moved security forward in engineering teams that don't report to you, through consultation and design review rather than mandate.\n\nBonus: NERC CIP or IEC 62443 depth. Securing virtualized or containerized industrial control. Commissioning-phase security work at construction sites.\n\nWe are committed to pay equity and transparency.\n\nFluidstack is an Equal Employment Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability and protected veterans’ status, or any other characteristic protected by law. Fluidstack will consider for employment qualified applicants with arrest and conviction records pursuant to applicable law.\n\nYou will receive a confirmation email once your application has successfully been accepted. If there is an error with your submission and you did not receive a confirmation email, please email careers@fluidstack.io with your resume/CV, the role you've applied for, and the date you submitted your application- someone from our recruiting team will be in touch.\n\nCompensation Range: $275K - $344K","datePosted":"2026-10-24T08:22:46.351Z","dateModified":"2026-10-24T08:22:46.351Z","hiringOrganization":{"@type":"Organization","name":"FluidStack","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Millbrae","addressRegion":"CA","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"a13f3c0800438285662c09d4"},"url":"https://jobsearcher.com/jobs/a13f3c0800438285662c09d4"}}