Senior Threat Researcher

Title: Senior Threat Researcher Location: Home Office - US

We are looking for an experienced, highly resourceful Senior Threat Researcher to join Guardz's Security Research team.

In this role, you will operate at the intersection of advanced threat research, detection engineering, and incident response, serving as a key technical escalation point for our security research teams and also for the global Managed Detection and Response (MDR) team.
You will investigate complex security incidents, uncover emerging threats, develop effective detection mechanisms, and conduct security market research to help shape our product capabilities and security strategy.
This is a highly hands-on, high-impact position for someone who thrives on solving complex problems, takes ownership, and is comfortable navigating uncharted technical territory.

Responsibilities:

• Research emerging attack techniques, vulnerabilities, and adversarial behaviors, translating findings into effective detection rules, security controls, and response capabilities.
• Research emerging cybersecurity technologies, competitor capabilities, market trends, and evolving attack surfaces to identify opportunities for product innovation and differentiation.
• Continuously evaluate detection effectiveness, identify coverage gaps, reduce false positives, and improve detection accuracy.
• Serve as a senior technical escalation point for Guardz's global MDR team, leading complex investigations, threat hunting, root cause analysis, and incident response guidance.
• Partner with Security Research, Product, Engineering, and MDR teams to turn technical findings and field insights into scalable security capabilities.
• Partner with Customer Success and other go-to-market teams to provide expert security guidance and technical context for customer-facing discussions involving complex incidents, findings, and response actions.
• Develop investigation methodologies, detection strategies, and response playbooks, while mentoring and supporting analysts across our global security operations.
• Independently explore new technologies, tools, and research methodologies to anticipate emerging threats and strengthen Guardz's security offering.

Requirements:

• 5+ years of hands-on experience in threat research, detection engineering, incident response, or advanced security operations.
• Strong background in Tier 3 security operations, including complex incident investigations, threat hunting, and threat mitigation.
• Deep understanding of modern attack techniques, adversary behavior, and frameworks such as MITRE ATT&CK.
• Hands-on expertise in cloud, identity, email, and endpoint security, particularly Microsoft 365, Entra ID, and/or Google Workspace.
• Experience developing, testing, and optimizing detection logic within SIEM, EDR, XDR, or similar security platforms.
• Strong scripting and analytical capabilities, including Python and SQL.
• Experience researching AI-driven threats, agentic AI security, or AI-powered detection and response.
• Broad knowledge of cybersecurity technologies, attacker methodologies, and the modern security vendor landscape.
• Strong communication skills and the ability to explain sophisticated technical concepts to both technical and non-technical stakeholders.