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Network Security Engineer

Cerebras· IT & Security
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Hybrid (Sunnyvale, CA)Full-timePosted 1mo ago

About the role

Cerebras Systems is seeking a hands-on Network Security Engineer to build, operate, and secure the network infrastructure across data centers, cloud environments, and corporate networks. The role is based in Sunnyvale, CA with regular on-site work in data centers and is hybrid.

Responsibilities

  • Operate firewalls, ACLs, segmentation, and network security controls across data center, corporate, and AWS environments.
  • Support hands-on data center network operations, including deployment, configuration, troubleshooting, maintenance, and lifecycle management.
  • Implement and maintain segmentation, firewall, and ACL policies across corporate, compute, customer, and infrastructure environments.
  • Manage inbound and outbound network controls, including public exposure, NAT, load balancers, DNS filtering, proxies, and egress policies.
  • Implement and operate VPN, ZTNA, NAC, Wi-Fi, and vendor or partner connectivity.
  • Perform recurring firewall rule reviews, segmentation audits, and remediation of unnecessary network exposure.
  • Automate network and security workflows using Terraform, Ansible, GitOps, Python, and policy as code.
  • Support network telemetry, detection, investigation, and containment in partnership with Security Operations.
  • Troubleshoot routing, switching, TCP/IP, DNS, TLS, and cloud networking issues.
  • Maintain network architecture documentation, procedures, and runbooks.

Qualifications

  • 7+ years of experience in network security, network engineering, cloud security, or infrastructure security.
  • Strong hands-on experience with firewalls, ACLs, segmentation, routing, switching, VPNs, and network troubleshooting.
  • Experience operating data center and on-premises network infrastructure.
  • Experience with AWS networking, including VPCs, transit gateways, security groups, and load balancers.
  • Experience with Palo Alto, Juniper, Cloudflare, or similar platforms.
  • Proficiency with Terraform, Ansible, Python, GitOps, or similar automation tools.
  • Strong understanding of ZTNA, NAC, egress controls, TCP/IP, DNS, and TLS.
  • Strong written communication and documentation skills.
  • Ability to work regularly on-site in Sunnyvale, CA and perform hands-on work in data center environments.

Skills

Required:FirewallsACLs and segmentationRouting and switchingVPN, ZTNA, NACCloud networking (AWS)Automation tools (Terraform, Ansible, GitOps)
Nice to have:Python
Last updated Oct 4, 2026. Interested? Apply on the company site.

About Cerebras

Cerebras is the go-to platform for fast and effortless AI training. Learn more at cerebras.ai.

Cerebras is the go-to platform for fast and effortless AI training.

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