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About the Role

We are seeking an Infrastructure Security Engineer with a strong Windows engineering background and practical exposure to modern platform security controls to help our global team secure Jane Street’s IT platforms. This role involves prioritizing remediation efforts, providing technical advice, and making decisions on behalf of the group. We are looking for individuals who excel at writing code and automation (e.g., PowerShell modules, Python) and integrating security products via their APIs.

Responsibilities

Proactively propose, design, test, implement, and document strategic security controls.
Coordinate and deliver security solutions across IT platforms.
Identify opportunities to further automate intelligent workflows.
Help secure internal IT and remote working platforms through hands-on technical work, consultancy, and security influence.
Build security controls that scale.
Investigate emerging threats.
Develop new security tooling.
Drive vulnerability management initiatives.

Requirements

Proficient in securing Windows OS platforms and resolving complex technical issues in a fast-moving environment.
Hands-on experience utilizing integrated security technologies for safeguarding Windows operating systems, including application control, host-based firewalls, auditing and event monitoring, and disk encryption.
Skilled in administering endpoint security and vulnerability management solutions, including antivirus, anti-malware, EDR, vulnerability scanning, and patch management.
Knowledgeable about security best practices, including operating system hardening, privileged access management, and vulnerability mitigation.
Understand common threat tactics, techniques, and procedures (TTPs) and effective countermeasures.
Well-versed in Windows core infrastructure services (AD/EntraID, PKI).
Eager to produce scalable and repeatable security practices through automation.
Understand security tooling and APIs.
Flexible, reliable, and highly collaborative.
Proven experience automating workflows in PowerShell or other scripting languages.
Fluent in English.

Skills

Windows engineering
Platform security controls
PowerShell
Python
API integration
Security tooling
Endpoint security
Vulnerability management
Operating system hardening
Privileged access management
Threat tactics, techniques, and procedures (TTPs)
Windows core infrastructure services (AD/EntraID, PKI)
Automation

About the Company

Jane Street’s IT Engineering group is a highly dedicated team of engineers who monitor and manage our environment across a physical/virtual computing landscape that spans three continents.