Senior Cloud Security Engineer - Multi-Cloud IR & Detection

Chubb; Philadelphia (Philadelphia County); On-site; USD 140,000 - 190,000; Full time

Job summary

Chubb Global Information Security is seeking a hands-on Senior Cloud Security Engineer to detect, respond to, and harden our multi-cloud environment (Azure, AWS, GCP, and Microsoft 365). You will build detections, respond to incidents, and reduce attack surface through automation.

Ideal candidates have strong incident response fundamentals, apply them to cloud and SaaS, and can deliver detection content and automation rather than just consume it.

Qualifications

• 7+ years IT Security experience, with 3+ years hands-on in Azure and/or AWS security.
• Strong incident response background.
• Experience writing or tuning detection logic (KQL, Sigma, or equivalent) in a SIEM (Microsoft Sentinel preferred)
• Proficient with core security tooling: SIEM, EDR, cloud-native logging/posture tools (Defender for Cloud, GuardDuty, etc.)
• Comfortable using AI coding/analysis tools (Claude Code or similar) and automation workflows to streamline operations and accelerate investigations.
• Scripting ability (PowerShell and/or Python) for automation and tooling
• Strong time management and organizational skills
• Excellent communication skills, both verbal and written
• Solid problem-solving and decision-making skills
• Ability to be on-call or available after hours for emergencies

Responsibilities

• Detect, respond to, and remediate cyber threats across Azure, AWS, GCP, and Microsoft 365
• Build and tune detection content (KQL analytics rules, Sigma rules, Sentinel workbooks) to close coverage gaps as new threats and cloud services emerge
• Lead and support incident response engagements end-to-end — triage, containment, eradication, and after-action reporting
• Harden cloud and SaaS environments against known attack techniques in partnership with infrastructure, IAM, and application teams
• Create workflows and automations (logic apps, scripts, or AI-assisted tooling) to solve recurring security challenges and speed up triage/response
• Investigate anomalous activity using SIEM, EDR, and native cloud logging; drive tuning to reduce false positives without losing coverage
• Prepare operational reporting and after-action reports for business and IT Security management
• Stay current on emerging cloud attack techniques and translate them into new detections or hardening controls before they're needed

Skills

Incident response

Cloud security

Threat detection

KQL/Sigma

PowerShell

Python

Automation

SIEM/EDR

Tools

Microsoft Sentinel

Defender for Cloud

GuardDuty

Cloud logging tools

SIEM tooling

Job description

Chubb Global Information Security is seeking a hands-on Senior Cloud Security Engineer to detect, respond to, and harden our multi-cloud environment (Azure, AWS, GCP, and Microsoft 365). You will build detections, respond to incidents, and reduce attack surface through automation.

Ideal candidates have strong incident response fundamentals, apply them to cloud and SaaS, and can deliver detection content and automation rather than just consume it.