Network Security Senior Engineer

Verizon • Southlake, TX

20h • Hybrid

About The Position

The Global Network & Technology - Network Security team is seeking a highly motivated and experienced Cybersecurity Engineer to join the Network Security Defense team. The Defense teams are responsible for owning the security lifecycle and effectiveness across the Core, Edge, and Access networks. This is your chance to command and execute the complete security lifecycle for our mission-critical network assets, from Optical Transport to cutting-edge carrier-class equipment. We're looking for an expert with deep, hands-on expertise in next-gen firewalls (Juniper, F5, Cisco), SIEM powerhouses, and centralized IAM solutions. You won't just implement defenses—you'll own the security scorecard, proactively hunt threats, and master the entire vulnerability lifecycle. Your expertise will be crucial in pioneering robust incident response protocols, and you'll be the driving force behind powerful Python automation and dynamic Splunk dashboards that transform raw data into a crystal-clear security vision. If you have specialized knowledge in high-speed optical networks (NGPON/XGS, IPTV, CDN) and a passion for securing the foundation of our global connectivity, this is where you make your biggest impact.

Requirements

• Bachelor’s degree or four or more years of relevant work experience.
• Four or more years of relevant work experience, demonstrated through one or a combination of work and/or military experience, or specialized training.
• Familiarity with Identity and Access Management (IAM) solutions.
• Strong working knowledge of incident response frameworks and methodologies like NIST 800-61 and MITRE ATT&CK.
• Expert-level ability to write complex, optimized SPL (Splunk Search Language) searches, including macros, data models, and lookups for efficient threat hunting and investigation.
• Experience in developing, testing, and maintaining automation playbooks using Python/API integrations and Splunk SOAR (Security Orchestration, Automation, and Response) to automate triage and response actions.

Nice To Haves

• Security and Networking Certifications/Knowledge: Security certifications (e.g., CompTIA Security+, CCSP, CISSP, OSCP) and networking certifications (e.g., Palo Alto PCNSE, Cisco CCNP, or CCNA, Ciena CRS, Juniper JNCIE).
• Core Network and Systems Expertise: Experience with networking (especially Internet-related protocols), UNIX or Linux systems engineering expertise, and knowledge of network-based, system-level, and application-layer attacks.
• Vulnerability Management and Scanning: Ability to configure and interpret network scans using tools such as Tenable Nessus, Qualys, Rapid7 InsightVM, or OpenVAS. Ability to interpret CVSS scores and prioritize risk.
• Security Appliances and Encryption: Experience with Firewalls, VPNs, IDS/IPS, DDoS mitigation, and encryption for data in transit (e.g., IPsec, or TLS) and at rest.
• Data Analysis and Advanced Analytics: Hands-on experience working with internet-scale data sets (Netflow, BGP, DNS, and IDS logs), and knowledge of statistics, data visualization, anomaly detection, machine learning, and system administration, including big data analytical tools like Elasticsearch and SQL/NoSQL technologies.

Responsibilities

• Identify technology gaps to lead in the design, architecture, and implementation of appropriate security solutions.
• Partner across the Operations, Engineering, and Planning organizations to ensure secure design patterns are embedded into new deployments and major changes.
• Work independently on multiple technical initiatives.
• Communicate clearly and effectively, articulating complex technical concepts to diverse internal and external audiences.
• Serve as escalation support for security-related investigations, providing expert-level analysis and guidance during active incidents.
• Act as the security lead in network design reviews, ensuring that the Network assets meet stringent carrier-grade security standards.
• Execute root cause analysis and produce clear incident reports outlining timeline, impact, evidence, and remediation recommendations.
• Conduct proactive threat hunting across the identity, endpoint, and network telemetry to uncover adversary behavior and reduce dwell time.
• Create and tune threat detections using SIEM ( Security Information and Event Management) to improve alert fidelity and reduce false positives.
• Drive continuous improvement of network visibility and telemetry collection to strengthen detection and response capabilities.
• Perform regular security control assessments, validating configuration effectiveness, and closing gaps discovered during incidents or hunts.

Benefits

• Our benefits are designed to help you move forward in your career, and in areas of your life outside of Verizon. From health and wellness benefit options including: medical, dental, vision, short and long term disability, basic life insurance, supplemental life insurance, AD&D insurance, identity theft protection, pet insurance and group home & auto insurance.
• We also offer a matched 401(k) savings plan, up to 8 company paid holidays per year and up to 6 personal days per year, paid parental leave, adoption assistance and tuition assistance, plus other incentives, we’ve got you covered with our award-winning total rewards package.
• Depending on the role, employees have the opportunity to receive compensation in the form of premium pay such as overtime, shift differential, holiday pay, allowances, etc.
• Newly hired employees receive up to 15 days of vacation per year, which grows with additional service.

What This Job Offers

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