Cerebras is seeking a
Network Security Engineer to build, operate, and secure the network infrastructure supporting our data centers, cloud environments, corporate network, and AI systems.
This is a hands-on individual contributor role based in
Sunnyvale, CA, with regular on-site work in our data centers. You will work across network security and network operations, supporting firewalls, segmentation, routing and switching, network access, and automation.
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.
Skills and 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.
Relevant ExperienceExperience in several of the following is valuable:
- AI, HPC, or large-scale compute environments.
- Data center networking and security.
- AWS network security and segmentation.
- ZTNA and VPN architectures.
- DNS filtering, SWG, proxy, or SASE platforms.
- Vendor and partner connectivity.
- Public exposure and attack surface remediation.
- Network detection and incident response.
