Comcast Cybersecurity: Security Research Engineer

Comcast • Philadelphia, PA

16d

About The Position

Make your mark at Comcast -- a Fortune 30 global media and technology company. From the connectivity and platforms we provide, to the content and experiences we create, we reach hundreds of millions of customers, viewers, and guests worldwide. Become part of our award-winning technology team that turns big ideas into cutting-edge products, platforms, and solutions that our customers love. We create space to innovate, and we recognize, reward, and invest in your ideas, while ensuring you can proudly bring your authentic self to the workplace. Join us. You’ll do the best work of your career right here at Comcast. (In most cases, Comcast prefers to have employees on-site collaborating unless the team has been designated as virtual due to the nature of their work. If a position is listed with both office locations and virtual offerings, Comcast may be willing to consider candidates who live greater than 100 miles from the office for the remote option.) Job Summary We are hiring a security-focused researcher with a deep background in Internet measurement to develop a cryptographic inventory and visibility solution using enterprise network telemetry and Internet measurement techniques. This role combines expertise in network protocols, cryptographic standards, and telemetry analysis to build tools that provide actionable insights into cryptographic usage across enterprise, cloud, and Internet-scale environments. This role will sit with the newly created Post-Quantum Cryptography Center of Excellence within the Comcast Cyber Security (CCS) team. Job Description This position is ineligible for visa sponsorship. To be considered for this role, you must be legally authorized to work in the United States and not require sponsorship for employment now or in the future.

Requirements

• Bachelor's degree in computer science, Cybersecurity, or a related technical field with 2+ years of professional experience OR equivalent.
• Strong understanding of cybersecurity principles and network protocols (e.g., TLS, IPsec, DNSsec).
• Proficiency in development and engineering skills using languages such as Python and C.
• Familiarity with cryptographic algorithms (RSA, ECC, AES) and digital signatures.
• Ability to learn and work independently, with strong communication and problem-solving skills.

Nice To Haves

• Master’s or Ph.D. in Computer Science, Cybersecurity, or related technical field.
• Experience with or familiarity with post-quantum cryptography.
• Contributions to open-source security tools or frameworks.
• Track record of publications, contributions to patents, and active involvement in research and engineering projects.

Responsibilities

• Design and implement security-focused systems and proof-of-concepts for enterprise and cloud environments.
• Develop and integrate open-source security solutions with existing systems.
• Research and prototype new cybersecurity and privacy technologies, including cryptographic mechanisms.
• Analyze network traffic and metadata to assess protocol security, compliance, and risk posture.
• Collaborate with internal teams and external partners to validate findings, publish research, and contribute to open-source tools.
• Stay current with evolving standards in cryptography (e.g., TLS 1.3, post-quantum crypto) and network security.

Benefits

• 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 benefits summary on our careers site for more details.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Number of Employees: 5,001-10,000 employees