Senior Network Security Defense Engineer

Verizon•Southlake, TX

3d•Hybrid

About The Position

The GN&T Network Security team is looking for a highly motivated and experienced Senior Network Security Defense Engineer to join the team. The Defense teams are responsible for owning the security lifecycle and effectiveness across the Core, Edge, and Access networks, as well as all systems and network functions within Verizon Global Network and Technology. You’ll be finding the right technology to help ensure our Verizon’s critical network systems are secure and spot risks before they become real threats. But you’ll be doing more than just providing cyber security—you’ll help Verizon prepare for the unexpected, defend its systems, and protect the business, brand, and bottom line.

Requirements

Bachelor’s degree or four or more years of work experience.
Four or more years of relevant experience required, demonstrated through work experience and/or military experience.
Fluency in Linux or Unix command line
Strong OSI model and networking, especially TCP/IP and HTTPS
RHEL or other Linux hardening experience
Expertise with Splunk SPL or similar SIEM query languages to perform detection engineering, threat hunting, and data analysis.
Experience with Risk-Based Alerting: managing notable events, asset/identity correlation, and defining/tuning correlation searches.
Experience with IAM solutions (e.g. LDAP, SAML, OIDC) and encryption (e.g., IPsec, TLS)

Nice To Haves

A degree in engineering or computer science.
CyberSecurity certification(s) (CISSP, etc)
Experience with security risk procedures, security patterns, authentication technologies and security attack pathologies.
Experience with security and incident response frameworks such as NIST and MITRE
Linux Incident response and/or basic forensics
Private (OpenStack, Kubernetes, etc) or public (AWS, etc) cloud experience
Scripting and automation skills (Python, Ansible, etc)
Experience applying AI/ML or statistical analysis techniques to large security datasets.
IMS, SIP, 5GC, SIM card activation or other wireless telecom knowledge
Basic project management and organizational skills
Strong verbal and written communication skills

Responsibilities

Evaluating network function architecture to identify security risks.
Designing solutions to mitigate risk and close security gaps and reduce vulnerability.
Supporting configuration analysis and providing detailed guidance for implementing security controls on virtual and containerized network functions.
Implement controls for the Security Fundamentals of Access Management, Situational Awareness, Configuration Hardening, and Vulnerability Mitigation
Ensure that the security controls planned for the networks are operating effectively and meeting baseline standards.
Perform detection engineering and threat hunting using Splunk, CrowdStrike, and other SIEM/security tools to do lookups, investigate threats, and design proactive alerts.
Lead network security incident response activities, including triage, containment, eradication, and recovery for disruptive threats.
Build and refine formal incident playbooks and response runbooks, ensuring repeatable workflows for high-impact scenarios.
Execute root cause analysis and produce clear incident reports outlining the timeline, impact, evidence, and remediation recommendations
Focus on specific network functions including IoT, SIM-OTA, CALEA, Wireless Messaging (SMS+MMS), Femto, Roaming, and Location Services.