Network Security Engineer

Cerebras; United States; On-site; USD 90,000 - 130,000; Full time

Job summary

Cerebras is looking for a Network Security Engineer to design, build, and operate security controls ensuring safe data centers and cloud environments. This role involves the management of firewalls, network segmentation, and real-time security automation across enterprise and cloud networks.

The ideal candidate will have a Master's degree in computer science, hands-on experience with security infrastructure, and a deep understanding of network protocols and cloud-native resources.

Qualifications

• Master's degree or higher in computer science required.
• Expertise with industry-leading firewalls and policy design.
• Experience in a major cloud environment including AWS.

Responsibilities

• Design and operate firewall and security controls across networks.
• Build network security infrastructure as code.
• Lead network lifecycle management and configuration baselines.

Skills

Network security controls

Firewall management

Automation (Terraform, Ansible)

Python scripting

TCP/IP fundamentals

Education

Master's degree in computer science

Tools

AWS

Cloud-native firewalls

Job description

About The Role

We are seeking a Network Security Engineer to design, build, and operate the network security controls that keep Cerebras's data centers, cloud environments, and corporate infrastructure secure as we scale to support the world's most demanding AI workloads. You will own the lifecycle of our firewall, segmentation, and network detection capabilities — turning policy into automated, testable infrastructure — and partner closely with Network Engineering, IT, and Security Operations to keep the environment safe and operational. The right candidate brings hands‑on network security depth, an automation‑first mindset, and the ability to operate across enterprise, data center, and cloud network domains.

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.

Skills and Qualifications

• 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.

Equal Employment Opportunity

Cerebras Systems is committed to creating an equal and diverse environment and is proud to be an equal opportunity employer. We celebrate different backgrounds, perspectives, and skills. We believe inclusive teams build better products and companies. We try every day to build a work environment that empowers people to do their best work through continuous learning, growth and support of those around them.

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