Remote Global Enterprise Cyber Defense Lead

Dexcom; United States; Hybrid; USD 181,000 - 302,000; Full time

Benefits offered by this job

Medical, dental, vision coverage

Flexible work arrangements

Unlimited paid time off

Training & conferences

Career mentorship

Job summary

Dexcom is seeking a Senior Manager to lead Enterprise Cyber Defense, uniting detection engineering, incident response, threat hunting, and cyber readiness on a global scale. You will build a high-performing team, drive a threat-informed lifecycle, and coordinate cross-functional incident response with executive-level communication.

The role emphasizes AI-assisted automation, advanced telemetry, and readiness exercises, with travel 5–15% and a flexible remote/hybrid work arrangement.

Qualifications

• 10+ years of experience in cybersecurity, IT, or engineering; 5+ years focused on cyber defense, detection and response.
• Proven success building, transforming, or scaling enterprise cyber defense capabilities, with strong experience in detection engineering, incident response, and threat-informed defense.
• Strong understanding of modern detection and response technologies, including SIEM, SOAR, XDR, EPP, NDR, email security, identity telemetry, and cloud security.
• Deep knowledge of adversary behaviors, threat hunting, incident response, and detection methodologies, including practical use of MITRE ATT&CK; red/purple teaming or cyber readiness exercises is strongly preferred.
• Experience applying automation, AI, or machine-learning capabilities to security operations, including evaluating automated outputs, defining performance measures, and maintaining appropriate human oversight for security decisions.

Responsibilities

• Define and execute an Enterprise Cyber Defense strategy, operating model, and roadmap aligned to Dexcom’s business risk, threat landscape, and Information Security priorities.
• Build and lead a high-performing global cyber defense organization across employees, contractors, and strategic service providers.
• Build and mature a threat-informed detection engineering lifecycle that converts adversary behaviors into measurable detection and prevention coverage.
• Lead the cyber response to emerging and non-traditional risk scenarios and other evolving threats requiring cross-functional investigation, containment, and risk mitigation.
• Lead the agentic SOC and security automation strategy, using AI-assisted triage and investigation, and human-in-the-loop controls to improve response speed, consistency, and decision quality.
• Establish proactive threat hunting and adversary-validation capabilities, using threat intelligence, red and purple team activities, penetration-test findings, and technical simulations.
• Own the cyber readiness program, including tabletop exercises, technical response simulations, playbook validation, escalation testing, and readiness assessments.
• Provide oversight and incident command for high-severity cyber incidents, coordinating response across Security, IT, Privacy, Legal, business teams, and external partners, and ensuring lessons learned are translated into improved detections, automation, controls, and response practices.
• Set the strategy, architecture, integration, and optimization priorities for cyber defense platforms and telemetry, including SIEM, SOAR and case management, endpoint and network detection, email threat defense, and cloud security signals.
• Define and report cyber defense KPIs and KRIs that measure detection coverage and efficacy, response performance, false-positive reduction, automation and AI-agent performance, readiness, and risk reduction.

Skills

Threat hunting

Incident response

Detection engineering

Security operations

AI in security

Cross-functional leadership

Executive communication

Education

Bachelor's degree in a technical discipline

Tools

SIEM

SOAR

XDR

EPP

NDR

Cloud security

Email security

Identity telemetry

Job description

Dexcom is seeking a Senior Manager to lead Enterprise Cyber Defense, uniting detection engineering, incident response, threat hunting, and cyber readiness on a global scale. You will build a high-performing team, drive a threat-informed lifecycle, and coordinate cross-functional incident response with executive-level communication.

The role emphasizes AI-assisted automation, advanced telemetry, and readiness exercises, with travel 5–15% and a flexible remote/hybrid work arrangement.