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FluidstackFluidstack

Network Security Engineer

Design and defend network security architecture for AI compute infrastructure at gigawatt scale across data centers, OT networks, and cloud. Build detection, harden OT/BMS systems, and automate controls using IaC. Requires scaling network security experience, packet analysis, IT/OT segmentation, and real intrusion detection.

About the job

Role Scope

  • Design and defend the network security architecture across data centers, corp, and cloud: segmentation, firewalls, and east-west controls at gigawatt scale.
  • Build network detection: telemetry, flow analysis, and alerting across training fabrics, OT networks, and the WAN.
  • Harden the OT and BMS side, where the network touches physical plant, against threats most security teams never see.
  • Automate network security controls so new sites inherit the architecture on day one.

Requirements

  • Secured production networks at scale, and you read a packet capture as comfortably as a dashboard.
  • Designed segmentation for environments that mix IT, OT, and high-value compute.
  • Deployed and tuned NDR or flow-based detection that found real intrusions.
  • Work infrastructure-as-code: your firewall rules live in a repo, not a GUI.
  • Partnered with network engineering without becoming the department of no.

Nice-to-Haves

  • OT and ICS security.
  • Data center or cloud provider environments.
  • BGP and routing security.
  • Zeek or Suricata.

Skills

Network Security, Firewalls, Network Segmentation, Ndr, Flow Analysis, Packet Capture, Infrastructure As Code, Ot Security, Ics Security, BGP, Zeek, Suricata

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