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Senior Security Engineer - SecOps

Mozilla· Infrastructure
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Remote£66k - £87kfull-timePosted 3w ago

About the role

Senior security incident responder role focused on monitoring, detecting, and mitigating attacks across Mozilla products and services. Acts as incident commander, designs and maintains alerts and playbooks, conducts threat hunting, and collaborates with stakeholders to improve security readiness. Remote UK location.

Responsibilities

  • Identify and respond to security incidents on a global scale.
  • Act as an incident commander to drive incidents through the entire response lifecycle.
  • Design and maintain a portfolio of security alerts, automated actions, playbooks and escalation workflows in support of a high-performing 24/7 incident response capability.
  • Conduct threat hunting activities, anticipate future threats, and maintain forward-thinking strategies for tools/technology/processes that combat sophisticated threat actors.
  • Research threat intelligence reports, triage and manage resulting workflows.
  • Partner with key stakeholders and communicate effectively to maintain a continuously improving feedback loop of preparation, identification, analysis, containment, and post mortem activities.
  • Participate in on-call rotation.

Qualifications

  • 5+ years of demonstrated ability managing security incidents at a global scale and/or experience working in Security Operations Centers (SOC), Product Security Incident Response Teams (PSIRT), and Computer Security Incident Response Teams (CSIRT).
  • Expertise with security information and event management (SIEM) systems (eg. ELK, Google BigQuery, Splunk, etc.). Splunk proficiency is preferred.
  • Expertise with endpoint detection and investigation. Hands-on experience with leading EDR tools and demonstrated ability to leverage endpoint telemetry to find root cause.
  • Expertise with security orchestration and automation (SOAR) platforms such as Tines or Splunk SOAR.
  • Superb communication and leadership capacity; ability to partner effectively with diverse company stakeholders.
  • Real-world experience in software development and/or engineering operations for consumer products and services; B.S. in a technology-focused field is helpful.
  • Practical experience working with cloud technologies (eg. Google Cloud Platform, Amazon Web Services, Heroku, Microsoft Azure, etc.).

Skills

Required:Security incident managementSIEMEndpointDetection and InvestigationSOARCommunication and Stakeholder ManagementCloud Platforms

Benefits

  • Generous performance-based bonus plans to all eligible employees - we share in our success as one team
  • Rich medical, dental, and vision coverage
  • Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute)
  • Quarterly all-company wellness days where everyone takes a pause together
  • Country specific holidays plus a day off for your birthday
  • One-time home office stipend
  • Annual professional development budget
  • Quarterly well-being stipend
  • Considerable paid parental leave
  • Employee referral bonus program
  • Other benefits (life/AD&D, disability, EAP, etc. - varies by country)
Last updated Sep 30, 2026. Interested? Apply on the company site.

About Mozilla

Internet for people, not profit

Mozilla is the not-for-profit behind the lightning fast Firefox browser. We put people over profit to give everyone more power online.

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