(USA) Systems and Infrastructure Engineer III, Information Security

Walmart•Herndon, VA

9d•$108,000 - $234,000•Onsite

About The Position

This role is responsible for strengthening the security of all web ingress points across global eCommerce platforms. It focuses on developing and tuning WAF policies, enhancing client‑side detection and fingerprinting, managing defenses during active cyber‑attacks, and controlling scripted traffic. The position also collaborates closely with network and site reliability teams while building and operating the infrastructure that supports the organization’s overall web security posture. The Edge Ingress Security team plays a critical role in protecting our global eCommerce platforms from a wide range of online threats. From defending against web-based and DDoS attacks to managing unwanted scripted traffic and fraud, we are the gatekeepers of secure digital access. We collaborate closely with network, infrastructure, and product teams to ensure that every ingress flow—across all web properties—is secure, resilient, and adaptive to evolving threats. Our team thrives on solving complex security challenges in a fast-paced, high-impact environment.

Requirements

Hands-on experience with Web Application Firewall (WAF) management and DDoS mitigation strategies
Strong knowledge of network and web protocols such as TCP/IP, IPSec, HTTPS, and SSL
Deep understanding of how web properties and Content Delivery Networks (CDNs) function
Experience with client-side fingerprinting and behavioral data collection
Proficiency with log management tools such as Splunk, Kibana, or ArcSight
Strong scripting skills in at least one language
Familiarity with cloud platforms including Azure and GCP
Bachelor's degree in computer science, information technology, engineering, information systems, cybersecurity, or related area and 2 years’ experience in systems and infrastructure engineering or related area at a technology, retail, or data-driven company.
4 years’ experience in systems and infrastructure engineering or related area at a technology, retail, or data-driven company.

Nice To Haves

A security-first mindset and solid foundation in key security domains: application security, network security, architecture
Knowledge of network and security tools and protocols, including Firewalls and DNS
Strong analytical, problem-solving, and interpersonal communication skills
Certification in Security+, GISF, CISSP, CCSP, or GSEC
Master’s degree in Computer Science, Information Technology, Engineering, Information Systems, Cybersecurity, or related area
Knowledge in implementing Web Content Accessibility Guidelines (WCAG) 2.2 AA standards, assistive technologies, and integrating digital accessibility seamlessly.
Knowledge of accessibility best practices

Responsibilities

Create, tune, and enforce Web Application Firewall (WAF) policies across global eCommerce sites
Continuously evaluate and adapt ingress security policies based on the evolving threat landscape
Mature our client-side evaluation and fingerprinting capabilities
Assess and manage protection strategies during active cyber-attacks
Control and monitor scripted traffic across all digital properties
Collaborate with network and site reliability teams to secure all ingress points
Build, deploy, and manage security infrastructure and operations to support overall web security

Benefits

Performance-based bonus awards
Medical coverage
Vision coverage
Dental coverage
401(k)
Stock purchase
Company-paid life insurance
PTO (including sick leave)
Parental leave
Family care leave
Bereavement
Jury duty
Voting leave
Short-term disability
Long-term disability
Company discounts
Military Leave Pay
Adoption and surrogacy expense reimbursement
PTO and/or PPTO that can be used for vacation, sick leave, holidays, or other purposes
Walmart-paid education benefit program (Live Better U) for full-time and part-time associates
Tuition, books, and fees are completely paid for by Walmart