Senior Network Security Engineer

Comcast • Philadelphia, PA

4d • $117,172 - $175,758 • Hybrid

About The Position

This job is responsible for executing and advancing the security posture of Comcast’s core network platforms through secure architecture, vulnerability remediation, software patch validation, configuration compliance, access control enforcement, and vendor-driven hardening initiatives. This role serves as a platform/domain owner and execution lead for assigned network environments, partnering with architecture, engineering, cybersecurity, compliance, operations, and vendor teams to validate secure solutions in the lab, support production readiness, reduce risk exposure, and ensure network platforms are resilient, continuously patchable, and aligned to Comcast cybersecurity standards.

Requirements

• Bachelor's Degree in Computer Science, Information Technology, Cybersecurity, Network Engineering, or a related field; or equivalent combination of education and experience.
• 5+ years of experience in Network Engineering, Network Security Engineering, Infrastructure Security, or related technical disciplines.
• 3+ years of hands-on experience securing and supporting enterprise or service provider network environments.
• Experience with network platforms and technologies including Cisco, Juniper, Arista, Nokia, F5, Fortinet, or equivalent networking technologies.
• Hands-on experience with routing and switching technologies.
• Experience performing network vulnerability remediation, security patch validation, configuration hardening, and risk mitigation activities.
• Strong understanding of networking fundamentals including routing, switching, TCP/IP, DNS, DHCP, BGP, OSPF, MPLS, and network segmentation.
• Knowledge of network security technologies including AAA, TACACS+, RADIUS, PKI/certificates, access control, IDS/IPS, firewalls, VPNs, and secure management protocols.
• Experience supporting compliance and audit activities associated with PCI-DSS, SOC 2, NIST, CIS Controls, or similar security frameworks.
• Experience analyzing vendor security advisories, CVEs, software vulnerabilities, and remediation strategies.
• Familiarity with network monitoring, logging, configuration management, and compliance validation tools.
• Experience working within change management, incident management, and operational support processes.
• Strong troubleshooting, documentation, communication, and cross-functional collaboration skills.

Nice To Haves

• 7+ years of experience in network security engineering within large enterprise, telecommunications, ISP, cable, cloud, or service provider environments.
• Experience securing carrier-grade network infrastructure supporting large-scale production environments.
• Hands-on experience with network hardening methodologies aligned to CIS Benchmarks, NIST, CISA guidance, or vendor security best practices.
• Experience with automation and scripting using Python, Ansible, PowerShell, Terraform, or similar tools.
• Experience with network compliance, vulnerability scanning, and reporting platforms.
• Knowledge of Zero Trust, secure-by-design principles, privileged access management, and identity-based network security controls.
• Experience supporting security incident response, forensic investigations, and post-incident remediation.
• Familiarity with cloud networking and hybrid infrastructure security (AWS, Azure, GCP).
• Industry certifications such as: CISSP, CCNP Security, JNCIS/JNCIP, GIAC certifications, Security+

Responsibilities

• Own the security posture and execution roadmap for Comcast network domains and platforms such as Cisco, Juniper, Arista, Nokia, F5, Fortinet etc.
• Lead vulnerability remediation, risk mitigation, and patch validation activities for critical vulnerabilities, and vendor security advisories.
• Validate secure software releases, compensating controls, and configuration changes in lab environments before production implementation, including security review, bug scrub, test case validation, and certification support.
• Drive secure configuration rollout and compliance enforcement across supported platforms using approved network security standards, audit tooling, ticketing workflows, and remediation tracking.
• Support audit readiness and closure for PCI, CGA, SOC 2, and internal compliance reviews by validating controls, documenting remediation plans, and coordinating evidence collection.
• Configure, test, and operationalize new network security solutions and services, including secure authentication & authorization, certificate-based access, secure monitoring, secure logging, and access restrictions.
• Develop, review, and publish network security and resiliency standards that align with Comcast Cybersecurity Policy, CISA hardening guidance, regulatory expectations, and secure-by-design principles.
• Maintain continuous compliance by monitoring secure controls, reviewing audit results, validating configuration drift, coordinating remediation with platform teams, and helping define policy checks in network audit and compliance tools.
• Review network functions, features, software, hardware, and engineering designs to identify security risks, required mitigations, operational impacts, and production readiness requirements.
• Perform security assessments of network platforms and services to identify threats, vulnerabilities, exposed services, insecure protocols, weak authentication methods, access control gaps, and hardening opportunities.
• Partner with cross functional organizations/teams such as cybersecurity, architecture, network engineering, operations, and vendor teams to implement least-privilege access, improve auditability, and detect unauthorized or anomalous network changes.
• Engage vendors to resolve product security issues, validate hardened releases, influence secure-by-default capabilities, and ensure vendor solutions align with Comcast network security requirements.
• Assist with disaster recovery, technical continuity, incident response preparation, and after-action reviews for network security events, production exposures, and audit findings.
• Improve team execution by documenting standards, test results, remediation playbooks, operational handoffs, technical decisions, and lessons learned.
• Track execution progress, risks, blockers, and metrics across remediation initiatives, ensuring work is visible, measurable, and traceable through approved systems of record.
• Other duties and responsibilities as assigned.

Benefits

• 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.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior