# Security Engineer, Network

**Company:** [Fluidstack](https://hotfix.jobs/companies/fluidstack)
**Location:** Austin, TX, New York, NY, San Francsisco, CA, Seattle, WA
**Role:** Security Engineering
**Salary:** $218k – $252k/yr
**Experience:** 7+ years
**Skills:** network security, packet capture analysis, network segmentation, it/ot environments, ndr, flow-based detection, Infrastructure As Code, firewall automation, ot security, ics security, BGP, routing security, zeek, suricata
**Posted:** 2026-07-17

> Design and defend network security architecture for AI compute infrastructure at gigawatt scale, including segmentation, detection, and OT hardening across data centers, corp, and cloud. Requires experience securing large production networks with IT/OT mix, packet analysis, IaC for security controls, and real intrusion detection.

## Job Description

## Responsibilities
- 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.

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