Techfellow Limited · 4 hours ago
Experienced Windows Security Engineer | Technology-Driven Quantitative Trading Firm
New York, United States
Full-time
Hybrid
Mid, Senior Level
$0/yr - $425K/yr
5+ years expTechfellow Limited is a leading global trading and technology firm seeking an Experienced Windows Security Engineer to enhance the security posture of their Windows systems environment. The role involves designing and implementing security controls, managing vulnerabilities, and developing automation for security processes across a large scale.
EmploymentHuman ResourcesRecruiting
Responsibilities
Design, implement, and maintain platform-level security controls across Windows systems in hybrid environments
Lead efforts to harden the Windows estate, including application control, host firewalls, auditing, and encryption
Drive vulnerability management and patching strategy, ensuring consistent remediation across enterprise endpoints and servers
Build automation in PowerShell and related frameworks to streamline detection, response, and compliance workflows
Integrate and optimise endpoint protection and EDR solutions, ensuring effective coverage and minimal user friction
Collaborate with platform engineers to embed secure-by-default practices into system configuration and deployment pipelines
Evaluate new security tools, conduct proof-of-concepts, and contribute to the strategic roadmap for Windows platform defence
Monitor, investigate, and respond to potential threats targeting the Windows ecosystem, using telemetry and event data to identify patterns
Partner with identity, networking, and infrastructure teams on projects related to Active Directory, Entra ID, and PKI
Produce technical documentation and guidance to support operational consistency and knowledge sharing across teams
Qualification
Required
5-9 years' professional experience in Windows systems or security engineering roles within large, distributed environments
Deep knowledge of Windows internals and operating system security controls, including kernel-level understanding of process, memory, and privilege management
Proven ability to design and implement scalable endpoint security measures (AV/EDR, vulnerability scanning, patch orchestration, and configuration baselines)
Familiarity with security frameworks and best practices, including OS hardening, access management, and least-privilege enforcement
Hands-on experience with Active Directory, Entra ID, and PKI environments, including certificate lifecycle management
Strong automation and scripting ability using PowerShell, with the capability to build repeatable, efficient security workflows
Understanding of threat tactics and countermeasures relevant to Windows environments, including lateral movement and persistence techniques
Experience working in mission-critical hybrid infrastructures, balancing risk, uptime, and performance
Excellent communication skills - able to translate complex technical issues into actionable insights for non-specialist teams
Preferred
Exposure to vulnerability assessment tooling, SIEM integration, or event correlation pipelines
Company
Techfellow Limited
We partner with trading, investment and fintech firms who depend on high-calibre engineering to compete.
11-50 employees
Funding
Current Stage
Early StageCompany data provided by crunchbase