Sr. Staff Cyber Defense Engineer

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 Sr. Staff Cyber Defense Engineer, you will serve as a hands-on cyber defense architect, technical lead, and senior technical authority. You will use your deep technical expertise and sound technical judgment to influence roadmap and architecture decisions and lead complex cross-functional initiatives across detection, response, hunting, automation, and readiness. 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