Comcast Cybersecurity: Cyber Security Engineer – AI & Agentic Platforms

Job Summary

Job Description

As an Engineer 3, Cyber Security Engineer on the Cybersecurity AI & Data Platforms team, you will develop and maintain Premonition, Comcast’s internal platform for managing, deploying, and composing agentic pipelines that power global cybersecurity operations. 

You will split your time between: 

• building a robust, scalable platform for LLM and agent driven workflows, and 
• optimizing the high-performance data layer supporting those workflows, including storage formats, compression, latency, and query performance across large datasets. 

This role sits at the intersection of applied AI and big data engineering. You will work with large language models, orchestration frameworks, and cyber focused agentic pipelines, while also owning the data and infrastructure foundations that make those systems fast, reliable, and cost-effective at Comcast scale. You’ll partner closely with security operations, incident response, and threat hunting teams to translate real-world workflows into secure, composable, and observable agentic systems. 

Key Responsibilities 

• Design, build, and maintain the Premonition platform for managing, deploying, and monitoring agentic pipelines. 
• Develop composable building blocks—agents, tools, pipelines, evaluators, and configuration—to enable rapid workflow assembly and iteration. 
• Implement robust APIs, orchestration, and infrastructure integrations on AWS and EKS for reliable LLM and agent driven workloads. 
• Engineer and optimize the high performance data layer, including Iceberg/Delta/Hudi, compression, indexing, latency, and largescale query performance. 
• Work with embedded engines such as DuckDB and LanceDB to enable interactive, low latency analytics. 
• Collaborate with cybersecurity stakeholders (SOC, IR, threat hunters, engineers) to translate workflows into secure, automated, observable pipelines. 
• Experiment with and productionize LLM and agent patterns (RAG, tool use, multistep agentic workflows), including evaluation, safety, and guardrails. 
• Own the full lifecycle of Premonition services: design, implementation, testing, deployment, observability, performance tuning, and continuous improvement. 
• Contribute to and enforce standards and best practices for LLM/agent usage, data management, security, and governance. 
• Participate in design/code reviews and foster a supportive, caring, competitive, high ownership, deeply technical culture. 

Required Qualifications 

• Strong production experience with Python. 
• Solid SQL skills and experience working with large datasets. 
• Experience designing, building, and operating production APIs or microservices, including testing, observability, CI/CD. 
• Experience running workloads on AWS and Kubernetes/EKS. 
• Experience with high performance data engineering, including: 
  • Iceberg, Delta, or Hudi; or 
  • optimizing storage, compression, latency, and analytical query performance. 
• Ability to work in a deeply technical, high ownership environment and collaborate effectively across functions. 
• Strong communication skills with the ability to work closely with security stakeholders and translate workflows into technical designs. 

Preferred Qualifications 

• Demonstrated experience building LLM based applications or agentic workflows  (not just prompt tinkering). 
• Hands on experience with agentic workflows: agents, tools, orchestration, multistep pipelines. 
• Experience with LLM platforms: Ollama, Amazon Bedrock, SageMaker. 
• Familiarity with orchestration frameworks: LangChain, LlamaIndex, or equivalent internal tooling. 
• Production experience with Iceberg, Delta Lake, or Hudi. 
• Experience with DuckDB or LanceDB. 
• Experience with Rust and/or JavaScript/TypeScript. 
• Experience with workflow/orchestration tools: Airflow, Temporal, Argo. 
• Prior exposure to cybersecurity domains (SOC, IR, threat hunting, security engineering). 
• Experience in largescale enterprise or telecom environments with high security/reliability/compliance requirements. 

Employees at all levels are expected to:

• Understand our Operating Principles; make them the guidelines for how you do your job.
• Own the customer experience - think and act in ways that put our customers first, give them seamless digital options at every touchpoint, and make them promoters of our products and services.
• Know your stuff - be enthusiastic learners, users and advocates of our game-changing technology, products and services, especially our digital tools and experiences.
• Win as a team - make big things happen by working together and being open to new ideas.
• Be an active part of the Net Promoter System - a way of working that brings more employee and customer feedback into the company - by joining huddles, making call backs and helping us elevate opportunities to do better for our customers.
• Drive results and growth.
• Support a culture of inclusion in how you work and lead.
• Do what's right for each other, our customers, investors and our communities.

Disclaimer:

• This information has been designed to indicate the general nature and level of work performed by employees in this role. It is not designed to contain or be interpreted as a comprehensive inventory of all duties, responsibilities and qualifications.

Skills

Compensation

Comcast intends to offer the selected candidate base pay within the posted range for this role at the time of posting dependent on job-related, non-discriminatory factors such as experience. Base pay is one part of the Total Rewards that Comcast provides to compensate and recognize employees for their work.    Most sales positions are eligible for a Commission under the terms of an applicable plan, while most non-sales positions are eligible for a Bonus.  Additionally, Comcast provides best-in-class Benefits to eligible employees.  We believe that benefits should connect you to the support you need when it matters most, and should help you care for those who matter most.  That’s why we provide an array of options, expert guidance and always-on tools, that are personalized to meet the needs of your reality – to help support you physically, financially and emotionally through the big milestones and in your everyday life. Please visit the compensation and benefits summary on our careers site for more details.

The application window is 30 days from the date job is posted, unless the number of applicants requires it to close sooner or later.

Education

Certifications (if applicable)

Relevant Work Experience