Network Security Engineer

Cerebras Systems builds large-scale AI chip and computing technologies designed to accelerate AI training and inference. The Network Security Engineer will design, build, and operate firewall, segmentation, zero-trust, network detection, and access-control systems across data center, cloud, and corporate environments while automating security infrastructure and partnering with engineering and security teams.

Responsibilities:

• Design and operate firewall, segmentation, and zero-trust controls across data center, corporate, and cloud (AWS) networks
• Build and maintain network security infrastructure as code — including firewall rules, policy automation, and CI/CD-driven deployment
• Lead network lifecycle management: design review, configuration baselines, change automation, and ongoing rule hygiene
• Build detection capabilities for network-based attacker behaviors and partner with the Detection & Response team on response playbooks
• Implement and operate network access controls including ZTNA, VPN, and remote access patterns
• Drive periodic firewall rule reviews, segmentation audits, and remediation campaigns to reduce risk and complexity
• Document network security architecture, controls, and operating procedures in clear runbooks

Requirements:

• • Master's degree or higher in computer science
• • Deep expertise with industry leading firewalls, including policy design, automation, and operations
• • Strong proficiency with infrastructure as code (Terraform, Ansible) and at least one scripting language (Python preferred)
• • Hands-on experience operating network controls in a major cloud environment (AWS preferred), including VPCs, transit gateways, security groups, and cloud-native firewalls
• • Practical understanding of ZTNA, segmentation, and modern network access patterns
• • Solid fundamentals in TCP/IP, routing, switching, DNS, and TLS — with the ability to troubleshoot across the stack
• • Excellent written communication skills, with the ability to create clear documentation for both engineers and operators