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

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 RoleThis 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, and maintain high-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 protecting production AI/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.

Preferred: Practical understanding of building or implementing LLM-based agents, prompt engineering, and integrating AI models into automated workflows and custom 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, GIAC GCIA/GCIH, or cloud security certifications).Master's degree in Computer Science, Cybersecurity, IT Management with an emphasis on AI/Automation. LI-Remote #LI-ZP1Benefitsmultiple medical plans plus dental, vision and prescription drug coveragea competitive 401k with generous matchingPTO beginning at 20 days per yearup to 12 paid company holidays per year plus 2 paid days of Volunteer Time Offerbasic Life and AD&D Insurance as well as Short and Long-Term Disability Paid Parental Leave of up to 10 weeks Student Loan Assistance and Tuition Reimbursement, Backup Child and Elder Careand more10200 Arch Capital Services LLCArch Capital Group Ltd. is a Bermuda-based specialty insurer that provides insurance, reinsurance and mortgage insurance on a worldwide basis. With a 20+-year track record of delivering results and a coveted position on the S&P 500 index, Arch is a great place to grow your career.