Staff Cyber Defense Engineer

Dexcom, Inc; San Diego (CA); Hybrid; USD 156,000 - 261,000; Full time

Benefits offered by this job

Medical benefits

Dental benefits

Vision benefits

Wellness programs

Flexible work

Unlimited PTO

Training & mentorship

Conferences

Job summary

Dexcom, Inc. in San Diego is seeking a Staff Cyber Defense Engineer to design, implement, and optimize enterprise cyber defense capabilities.

You will own detection content, telemetry integrations, and automation, leading complex investigations and mentoring junior engineers. You should have deep experience with SIEM, SOAR, XDR/EDR, cloud security, and MITRE ATT&CK, plus strong scripting skills in Python or PowerShell to improve detections and responses.

Qualifications

• Typically requires a technical Bachelor's degree with 8–12 years of related experience, or a Master's with 5–7 years, or a PhD with 2–4 years.
• Hands-on expertise with enterprise detection, automation, and telemetry pipelines.
• Strong knowledge of MITRE ATT&CK, threat hunting, incident response, and forensics.

Responsibilities

• Design, implement, and maintain enterprise detection content across full lifecycle.
• Develop telemetry integrations, SOAR workflows, and response playbooks with oversight.
• Conduct proactive threat hunting using intelligence and telemetry data.
• Lead complex investigations, escalations, and risk remediation.
• Support red/purple team exercises, adversary emulation, and validation.
• Build scripts and API integrations to improve response consistency.
• Evaluate telemetry, detect coverage, and close gaps in tooling.
• Execute cyber readiness activities and validate playbooks.
• Partner with Information Security and IT to strengthen defenses.

Skills

SIEM & SOAR

XDR/EDR

NDR

Threat Intelligence

MITRE ATT&CK

Python automation

PowerShell

KQL

SQL

Incident response

Digital forensics

Threat hunting

AI/ML in security

Leadership

Certifications

Education

Bachelor's degree

Master's degree

PhD

Tools

Telemetry pipelines

API integrations

Security tooling

Job description

The Company Dexcom Corporation (NASDAQ DXCM) is a pioneer and global leader in continuous glucose monitoring (CGM). Dexcom began as a small company with a big dream: To forever change how diabetes is managed. To unlock information and insights that drive better health outcomes. Here we are 25 years later, having pioneered an industry. And we're just getting started. We are broadening our vision beyond diabetes to empower people to take control of health. That means personalized, actionable insights aimed at solving important health challenges. To continue what we've started: Improving human health. We are driven by thousands of ambitious, passionate people worldwide who are willing to fight like warriors to earn the trust of our customers by listening, serving with integrity, thinking big, and being dependable. We've already changed millions of lives and we're ready to change millions more. Our future ambition is to become a leading consumer health technology company while continuing to develop solutions for serious health conditions. We'll get there by constantly reinventing unique biosensing-technology experiences. Though we've come a long way from our small company days, our dreams are bigger than ever. The opportunity to improve health on a global scale stands before us.

Meet The Team

Dexcom's Information Security team is building Enterprise Cyber Defense (ECD), a global capability focused on proactive, threat-informed defense. ECD brings together detection engineering, incident response, threat hunting and validation, cyber readiness, cyber risk response, security automation, and defensive technology engineering.

As a Staff Cyber Defense Engineer, you will serve as a senior hands‑on technical contributor responsible for designing, implementing, and optimizing cyber defense capabilities. You will independently own engineering solutions across detection, response, hunting, automation, and readiness, lead complex investigations and technical initiatives, and mentor junior engineers and analysts to strengthen team capability.

Where You Come In

• You design, develop, and maintain enterprise detection content through the full lifecycle, including requirements, detection logic, correlation rules, validation, tuning, and retirement across environments.
• You develop and implement cyber defense capabilities, including telemetry integrations, SOAR workflows, response playbooks, and agentic response patterns with appropriate human oversight.
• You conduct proactive threat hunting using threat intelligence, adversary behaviors, and security telemetry, translating findings into improved detections and controls.
• You lead complex security investigations, escalations, and emerging or non-traditional risk scenarios, driving containment, recovery, risk mitigation, root-cause analysis, and durable improvements.
• You support red and purple team exercises, adversary emulation, detection validation, and simulations to identify and close defensive gaps.
• You build scripts, API integrations, and automation to reduce manual effort, improve response consistency, and increase analyst leverage.
• You evaluate security telemetry, detection coverage, and cyber defense tooling; troubleshoot visibility gaps and implement improvements.
• You execute cyber readiness activities, including technical exercises, playbook validation, escalation testing, and readiness assessments.
• You partner across Information Security and IT to strengthen defensive controls, maintain technical documentation and engineering procedures.

What Makes You Successful

• You have demonstrated success independently owning cyber defense solutions and complex technical initiatives.
• You bring strong experience with SIEM, SOAR, XDR/EDR, NDR, identity and email telemetry, cloud security technologies, and enterprise networking fundamentals.
• You have a strong engineering background in detection logic, automation, telemetry pipelines, API integrations, or security tooling using Python, PowerShell, SPL, KQL, SQL, or similar technologies.
• You have strong knowledge of adversary behaviors, threat hunting, incident response, digital forensics fundamentals, detection engineering, cyber threat intelligence, and MITRE ATT&CK.
• You have experience applying automation, AI, or machine-learning capabilities to detection, investigation, or automated response with appropriate human oversight.
• You can independently lead complex investigations, collaborate across teams, mentor practitioners, and communicate technical findings and risk.
• You may also bring certifications such as CISSP, CCSP, GIAC, or equivalent security certifications.

What You'll Get

• A front‑row seat to groundbreaking technology that impacts lives around the world.
• A full and comprehensive benefits program, including medical, dental, and vision coverage, and wellness programs.
• Competitive compensation with performance incentives and opportunities for advancement within a growing, innovative company.
• Work‑life balance support through flexible work arrangements and unlimited paid time off.
• Access to in‑house training, development programs, career mentorship, and opportunities to attend security conferences to support your professional growth.
• The chance to work in an inclusive, diverse environment that values teamwork, collaboration, and continuous improvement.
• The opportunity to connect with the #dexcomwarriors community and contribute to a purpose‑driven mission that makes a difference.

Travel Required

0-5%

Experience and Education Requirements

• Typically requires a Bachelor's degree in a technical discipline, and a minimum of 8-12 years related experience or Master's degree and 5-7 years equivalent industry experience or a PhD and 2-4 years of experience.

Remote Workplace

Your location will be a home office; you are not required to live within commuting distance of your assigned Dexcom site (typically 75 miles/120km). If you reside within commuting distance of a Dexcom site (typically 75 miles/120km) a hybrid working environment may be available. Ask about our Flex workplace option.

Dexcom's AAP may be viewed upon request by contacting Talent Acquisition at [e-mail]. If you are an individual with a disability and would like to request a reasonable accommodation as part of the employment selection process, please contact Dexcom Talent Acquisition at [e-mail].

An Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, age, national origin, or protected veteran status and will not be discriminated against on the basis of disability.

Salary:$156,400.00 - $260,600.00#DexcomUS