Senior Security Engineer

Job Title: Senior Security Engineer
Requisition ID:
R028205
Job Description:
Your Platform
Activision Blizzard supports our interactive gaming brands and studios with a diverse range of career opportunities across corporate functions. We bring together agility and creativity to improve the employee and player experience. To learn more, visit www.activisionblizzard.com.
Activision Blizzard’s Security Engineering Team is looking for a talented and motivated Senior Security Engineer to join its ranks. You’ll join a technical team focused on safeguarding Activision, Blizzard, and King’s games, systems, and people.
In this role, you’ll design, build, automate, and operate security capabilities across Azure, Google Cloud Platform (GCP), and on-premises environments. You’ll combine strong security fundamentals with Python engineering, infrastructure as code, and practical AI and large language model (LLM) experience to reduce risk and improve how security work gets done. The ideal candidate owns services from design through production, writes clear documentation, and helps other engineers succeed.

As a Senior Security Engineer, you may find yourself…
Designing and operating security controls across systems, including secure configurations, identity controls, network segmentation, and logging
Building maintainable Python services, API integrations, and automation that reduce manual work, with testing, error handling, monitoring, and secure credential management
Developing AI/LLM-assisted security workflows, evaluating their accuracy and usefulness, and implementing data protection, least-privilege access, and human approval for sensitive actions
Using Terraform or equivalent infrastructure-as-code tools and CI/CD pipelines to deploy repeatable, reviewable security infrastructure and detect configuration drift
Engineering and integrating traditional security tools such as firewalls, VPNs, web application firewalls, endpoint protection, vulnerability scanners, and SIEM platforms
Performing threat modeling and security design reviews, identifying control gaps, and partnering with service owners to prioritize and implement remediation
Writing and maintaining architecture documentation, design decisions, runbooks, standard operating procedures, and operational handoff materials
Participating in engineering projects from requirements through production, making risk-informed tradeoffs, as well as reviewing code and designs
Troubleshooting security services using logs, metrics, and network analysis; improving reliability and supporting through an on-call rotation
Turning incidents and operational feedback into durable improvements through blameless postmortems, automated checks, and measurement of risk reduction and time saved

You may succeed in this role if you…
Have hands-on experience securing and operating Azure and GCP environments, including cloud identity, networking, logging, and workload security
Write quality Python and can demonstrate automation or integrations you have built, tested, deployed, and supported
Have practical experience integrating AI/LLMs into tools or workflows beyond conversational use, and understand their limitations, evaluation needs, and security risks
Use infrastructure as code, version control, code review, and CI/CD to make changes reproducible, testable, and safe to roll back
Apply security fundamentals including least privilege, defense in depth, secure configuration, vulnerability management, encryption, and secrets management
Communicate clearly in writing and conversation, translating technical findings into actionable guidance and documentation others can use without your help
Can turn ambiguous problems into scoped engineering work, own delivery and operational outcomes, and collaborate across security, IT, cloud, and development teams
Help peers grow through constructive feedback, automate repeated work, and choose practical, supportable solutions rather than adding unnecessary complexity

Types of projects you may work on…
Automating firewall rule reviews, security tool configuration, vulnerability enrichment, and remediation workflows using Python and APIs
Developing AI/LLM-assisted alert enrichment, investigation summaries, or documentation retrieval with evaluation, auditability, and appropriate human oversight
Creating reusable infrastructure-as-code modules and deployment pipelines with security validation, drift detection, and rollback procedures
Improving security telemetry, service health monitoring, and the runbooks needed to operate these capabilities reliably

Areas of Expertise for a Senior Security Engineer
8+ years of security engineering experience
Cloud: Azure and GCP familiarity
Programming and automation: Python, REST APIs, SDKs, automated testing, dependency management, and maintainable service integrations
AI/LLMs: model APIs, retrieval-augmented generation, evaluation, output validation, and bounded tool permissions
Network security: TCP/IP, DNS, TLS, routing, segmentation, firewalls, VPNs, web application firewalls, and intrusion detection/prevention
Infrastructure as code and delivery: Terraform or equivalent, configuration management, Git, CI/CD, policy as code, and change control
Security engineering fundamentals: threat modeling, secure design, vulnerability assessment, remediation prioritization, and system hardening
Systems engineering: Linux, Mac, and Windows administration, troubleshooting, patching, availability, and operational recovery
Technical communication: architecture diagrams, design records, runbooks, procedures, knowledge transfer, and guidance for technical and nontechnical audiences

Our World

Activision Blizzard brings together interactive entertainment brands and studios at the intersection of media, technology, and entertainment. We are home to beloved franchises including Call of Duty®, World of Warcraft®, Overwatch®, Diablo®, and Candy Crush™.

Our ability to build immersive and innovative worlds is enhanced by diverse teams working in an inclusive environment. We aspire to have a culture where everyone can thrive and help connect and engage the world through epic entertainment.
The videogame industry and therefore our business is fast-paced and will continue to evolve. As such, the duties and responsibilities of this role may be changed as directed by the Company at any time to promote and support our business and relationships with industry partners.

Activision is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, gender expression, national origin, protected veteran status, or any other basis protected by applicable law and will not be discriminated against because of disability.

Rewards
We provide a suite of benefits that promote physical, emotional and financial well-being for ‘Every World’ - we’ve got our employees covered!  Subject to eligibility requirements, the Company offers comprehensive benefits including:
Medical, dental, vision, health savings account or health reimbursement account, healthcare spending accounts, dependent care spending accounts, life and AD&D insurance, disability insurance;
401(k) with Company match, tuition reimbursement, charitable donation matching;
Paid holidays and vacation, paid sick time, floating holidays, compassion and bereavement leaves, parental leave;
Mental health & wellbeing programs, fitness programs, free and discounted games, and a variety of other voluntary benefit programs like supplemental life & disability, legal service, ID protection, rental insurance, and others;
If the Company requires that you move geographic locations for the job, then you may also be eligible for relocation assistance.
Eligibility to participate in these benefits may vary for part time and temporary full-time employees and interns with the Company.  You can learn more by visiting
https://www.benefitsforeveryworld