Sr. Staff Cyber Defense Engineer

1 DexCom Inc; California; Hybrid; USD 181,000 - 302,000; Full time

Benefits offered by this job

Medical benefits

Dental benefits

Vision benefits

Flexible work arrangements

Unlimited PTO

Job summary

Dexcom is seeking a Senior Cyber Defense Leader to shape the Enterprise Cyber Defense program, guiding architecture, telemetry, and incident response across large-scale cloud, hybrid, and on-prem environments.

You will own the detection engineering lifecycle from logic to validation, mentor engineers, and drive cross-functional projects with senior leadership support. Strong emphasis on telemetry, automation, and security tooling is required.

Qualifications

• Bachelor’s degree in a technical discipline.
• 13+ years of related experience or a Master’s degree with 8+ years equivalent industry experience or a PhD and 5+ years of experience.
• Certifications such as CISSP, CCSP, GIAC, or equivalent advanced security certifications.

Responsibilities

• Define and execute the technical strategy for Enterprise Cyber Defense capabilities.
• Own the enterprise detection engineering lifecycle: detection logic, correlation rules, telemetry requirements, validation, tuning and measurable efficacy.
• Design and engineer cyber defense capabilities including advanced detections, telemetry integrations, SOAR workflows and agentic response patterns with human oversight.
• Lead major cross-functional cyber defense initiatives and technology transformations.
• Provide senior technical leadership during complex cyber incidents and drive root-cause analysis and durable defensive improvements.
• Translate technical risk for senior leaders and mentor engineers and analysts to strengthen technical maturity.

Skills

SIEM

SOAR

XDR/EDR

NDR

Cloud security

Python

PowerShell

SPL

KQL

SQL

Threat hunting

Incident response

Digital forensics

MITRE ATT&CK

AI in security

CISSP

Education

Bachelor’s degree in a technical discipline

Master’s degree in a technical discipline

PhD

Job description

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.

Where You Come In:

You influence the technical strategy and roadmap for Enterprise Cyber Defense capabilities, aligned to business risk, the threat landscape, and Information Security priorities. You serve as a technical authority for cyber defense architecture, establishing design principles, telemetry standards, integration patterns, and engineering practices across cyber defense platforms and data sources. You own the enterprise detection engineering lifecycle, including detection logic, correlation rules, use cases, telemetry requirements, validation, tuning, and measurable efficacy across environments. You design and engineer cyber defense capabilities, including advanced detections, telemetry integrations, SOAR workflows, and agentic response patterns with appropriate human oversight. You lead major cross‑functional cyber defense initiatives and technology transformations, resolving complex dependencies, technical tradeoffs, and sequencing decisions. You provide senior technical leadership during the most complex cyber incidents and emerging or non‑traditional risk scenarios, driving root‑cause analysis, corrective actions, and durable defensive improvements. You define the technical approach for threat hunting and adversary validation, using threat intelligence, red and purple team findings, incident lessons, and simulations to improve defenses. You drive cyber readiness engineering through technical exercises, playbook validation, escalation testing, and the identification and remediation of systemic defense gaps. You translate technical risk for senior leaders and mentor engineers and analysts to strengthen technical maturity.

What Makes You Successful:

You have demonstrated success leading complex cyber defense initiatives across organizational boundaries. You bring deep expertise with SIEM, SOAR, XDR/EDR, NDR, identity and email telemetry, and cloud security technologies in large‑scale cloud, hybrid, and on‑premises environments. 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 deep knowledge of adversary behaviors, threat hunting, incident response, digital forensics fundamentals, detection engineering, cyber threat intelligence, and MITRE ATT&CK. You have experience applying AI or machine‑learning capabilities to detection, investigation, or automated response, including performance measurement and appropriate human oversight. You demonstrate the ability to operate as a senior technical authority, influence leaders without formal authority, mentor senior practitioners, and make sound decisions in high‑stakes situations. You may also bring certifications such as CISSP, CCSP, GIAC, or equivalent advanced 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 13+ years related experience or a Master’s degree and 8+ years equivalent industry experience or a PhD and 5+ 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].

Meritain, an Aetna Company, creates and publishes the Machine‑Readable Files on behalf of Dexcom. To link to the Machine‑Readable Files, please click on the URL provided: https://health1.meritain.com/app/public/#/one/insurerCode=MERITAIN_I&brandCode=MERITAINOVER/machine-readable-transparency-in-coverage?reportingEntityType=TPA_19874&lock=true

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.

AI in Hiring Notice: We may use AI supported tools to help make our hiring process more efficient, consistent, and accessible for candidates around the world. All hiring decisions are made by people.

Salary: $181,000.00 - $301,600.00 #DexcomUS

Since 1999, Dexcom has simplified and revolutionized diabetes management, positively impacting millions worldwide. At Dexcom, we’re more than just a medical device company; we’re a collective of visionary thinkers, trailblazers, and problem solvers. Our mission transcends the ordinary. We aim to revolutionize healthcare, one groundbreaking technology at a time.