Network Senior Engineer

Job Summary

The Senior Network Engineer, working under moderate supervision, is a hands-on senior technical resource responsible for designing, implementing, and supporting complex portions of Westfield's Network (Data, Voice, Video) environment. This role leads advanced troubleshooting, owns key network domains, and mentors Network Engineers while driving improvements in reliability, performance, and security.

Applicants must be currently authorized to work in the United States on a full-time basis without employer sponsorship.

Job Responsibilities

• Designs and implements solutions for enterprise LAN, WAN/SD-WAN, wireless, and security using:
  • Arista switching and routing in data center and campus environments.
  • Juniper wireless infrastructure for corporate and guest connectivity.
  • Palo Alto firewalls for perimeter, data center, and remote-access security.
• Develops high-level and low-level designs (HLD/LLD), implementation plans, and rollback procedures for projects and major changes.
• Owns one or more network domains (e.g., WAN/SD-WAN, wireless, campus, network security) and acts as subject matter expert.
• Leads daily operational support, maintenance, and administration for assigned network domains.
• Serves as a Tier-2/Tier-3 escalation point for complex incidents and performance issues.
• Performs advanced root cause analysis, documents findings, and drives corrective and preventative actions.
• Conducts capacity and utilization analysis, recommending and implementing upgrades or optimizations.
• Participates in on-call rotation and after-hours maintenance windows as required.
• Designs and maintains network security standards, including segmentation, security zones, and firewall policies on Palo Alto platforms.
• Defines and maintains baseline configurations and hardening standards for Arista, Juniper wireless, and SD-WAN components.
• Ensures network solutions comply with Information Security policies and regulatory requirements.
• Develops and improves network automation, templates, and tools (e.g., Ansible, Python, CI checks for configs) in partnership with software engineers.
• Identifies opportunities to improve resiliency, performance, and supportability, and leads the implementation of those improvements.
• Contributes to the selection and integration of network monitoring, logging, and management tools.
• Provides technical leadership for network-related projects and initiatives.
• Participates with integration of networking services in Azure and AWS.
• Mentors Network Engineers by reviewing designs and changes, sharing troubleshooting techniques, and providing guidance on best practices.
• Contributes to and helps enforce network standards, documentation quality, and change discipline.
  

Job Qualifications

• Bachelor's degree in Information Systems, Computer Science, or related field, or equivalent work experience.
• Typically 5-10 years of experience in network engineering in medium to large enterprise environments.
• Industry certifications such as CCNA/CCNP, PCNSE, JNCIS, or Arista ACE (or comparable experience) is preferred.
  

Location
Hybrid defined as three (3) or more days per week in the office.

Behavioral Competencies

• Collaborates
• Customer focus
• Communicates effectively
• Decision quality
• Nimble learning

Technical Skills

• Strong hands-on experience with:
  • Layer 2/3 enterprise networking (VLANs, STP, routing protocols such as OSPF and BGP, QoS).
  • Arista switches/routers in data center and campus roles.
  • Juniper wireless controllers and access points.
  • Palo Alto firewalls, VPNs, and security policies.
  • SD-WAN technologies and policy-based routing.
  • Strong knowledge of Azure and AWS networking services.
• Proficiency with network monitoring and performance analysis tools.
• Practical experience with scripting/automation tools (e.g., Python, Ansible, Git-based workflows) preferred.
  

This job description describes the general nature and level of work performed in this role. It is not intended to be an exhaustive list of all duties, skills, responsibilities, knowledge, etc. These may be subject to change and additional functions may be assigned as needed by management.