Arch Capital Group Ltd.

Senior Security Engineer (Remote - North Carolina, Florida, or South Carolina preferred)

Arch Capital Group Ltd.$100K — $130K *
US-Anywhere
+ 6 other locationsRemote
Information Technology
5 - 7 years of experience
Job Overview by Ladders

Qualifications

  • 7+ years of cybersecurity experience focusing on security or detection engineering
  • 3+ years in a Senior Security Engineer role
  • In-depth technical knowledge of incident response and threat hunting
  • Experience with detection logic in enterprise SIEM, EDR/XDR, or cloud-native tools
  • Expertise in securing cloud infrastructure (AWS, Azure, or GCP)
  • Proficiency in Python/Powershell for building tools and working with REST APIs
  • Bachelor's degree in Computer Science, Cybersecurity, or Engineering

Responsibilities

  • Design and deploy AI workflows and autonomous playbooks for alert triage and incident response
  • Develop and tune detection logic focusing on behavioral analytics and anomaly detection
  • Utilize Python to create custom security tools and maintain codebases for orchestration
  • Lead threat hunting efforts and serve as a Tier-3 escalation resource
  • Analyze attacker tactics using the MITRE ATT&CK framework and close coverage gaps
  • Secure cloud environments, especially for AI/LLM pipelines
  • Mentor junior team members and enforce software engineering best practices

Benefits

  • Work remotely from anywhere in the U.S. (near Arch office preferred)
  • Opportunity to shape next-generation security capabilities
  • Involvement in high-impact enterprise security challenges
  • Access to advanced AI-driven detection and automation technologies
Full Job Description

Overview

We are seeking a Senior Security Engineer to protect enterprise systems, data, and cloud environments from evolving cyber threats. This role focuses on advanced security engineering, threat detection, and AI-driven security capabilities. You will serve as a senior technical resource, leading complex investigations and improving detection and response through automation and AI.

Why This Role

This role offers the opportunity to shape next-generation security capabilities, including AI-driven detection, automation, and cloud security, while working on high-impact enterprise challenges.

This is a remote role that can sit anywhere in US (near Arch office preferred).

Key Responsibilities

  • Design, build, and deploy agentic AI workflows and intelligent autonomous playbooks to automate Tier-1/2 alert triage, context enrichment, and incident response.

  • Develop and tune complex detection logic across SIEM, EDR/XDR, and cloud platforms, focusing on behavioral analytics and anomaly detection.

  • Utilize Python to build custom security tools, integrate disparate security APIs, andmaintainhigh-quality, reusable codebases for security orchestration (SOAR).

  • Lead threat hunting initiatives and serve as a Tier-3 escalation resource for complex, high-severity security incidents.

  • Analyze attacker tactics, techniques, and procedures (TTPs) to map coverage against the MITRE ATT&CK framework and proactively close gaps.

  • Secure cloud environments (AWS, Azure, or GCP), with a specific focus on auditing, monitoring, and protectingproductionAI/LLM pipelines and workloads.

  • Mentor junior team members, conduct code reviews for automation scripts, and promote robust software engineering best practices within the security team.

Qualifications

Required

  • 7+ years of cybersecurity experience with a focus on security or detection engineering

  • 3+yearsin a Sr. SecurityEngineerrole

  • Deep technical knowledge of incident response, threat hunting, and adversary TTPs.

  • Experience implementing and managing detection logic across enterprise SIEM, EDR/XDR, or cloud-native security tools.

  • Experience securing and monitoring cloud infrastructure (AWS, Azure, or GCP).

  • Demonstrated experience building functional toolsin Python/Powershell, interacting with REST APIs, and writing clean, structured code (experience with Git and CI/CD pipelines preferred).

  • Bachelorsdegree inComputer Science, Cybersecurity,orEngineering.

Preferred

  • Practical understanding of building or implementing LLM-based agents, prompt engineering, and integrating AI models into automated workflowsandcustom API integrations.

  • Familiarity with AI/LLM-specific security vulnerabilities (e.g., OWASP Top 10 for LLMs, prompt injection, data poisoning, model evasion).

  • Experience with SIEM, EDR/XDR, SOAR, or identity security platforms

  • Advanced certifications (e.g., CISSP,GIACGCIA/GCIH, or cloud security certifications).

  • Masters degree inComputer Science, Cybersecurity, IT Management with an emphasis on AI/Automation.

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About Arch Capital Group Ltd.

Arch Capital Group Ltd. is a Bermuda-based public limited liability company which writes insurance, reinsurance and mortgage insurance on a worldwide basis. Arch Capital Services Inc. provides support and expertise to entities across ACGL to help them operate effectively and efficiently. Arch is committed to helping its associates create what’s next by providing access to a variety of programs supporting your professional development and a culture that encourages innovation, collaboration and professional growth. Arch Capital Group Ltd. is a Bermuda-based public limited liability company which writes insurance, reinsurance and mortgage insurance on a worldwide basis. Arch Capital Services Inc. provides support and expertise to entities across ACGL to help them operate effectively and efficiently. Arch is committed to helping its associates create what’s next by providing access to a variety of programs supporting your professional development and a culture that encourages innovation, collaboration and professional growth.
Learn more about Arch Capital Group Ltd.
Size
4,000 employees
Market Cap
$23.1 billion
Industry
Net Income
$1.4 billion
5 Year Trend
+16.3%
Revenue
$8.3 billion

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