Principal Network Engineer (Focus on Cisco, Palo Alto, Azure, Meraki, and F5) We are seeking a Principal Network Engineer with deep hands-on experience in Cisco networking, Palo Alto firewalls, Cisco Meraki SD-WAN, Azure hybrid cloud, and F5 load balancing. This role is ideal for a technical expert who excels in designing, implementing, and managing enterprise-scale, secure, and highly available network infrastructures across multi-datacenter and hybrid cloud environments. Key Technologies & Tools Used: Networking Platforms: Cisco (Catalyst, Nexus, IOS, IOS-XE), Palo Alto Firewalls, Cisco Meraki SD-WAN Cloud Networking: Microsoft Azure (VPN, ExpressRoute), AWS and GCP (preferred) Security Tools: Palo Alto Firewalls, Cisco ASA, Cisco ISE, Cisco Secure ACS (TACACS+/AAA) Load Balancing: F5 BIG-IP (LTM, GTM) Monitoring & Troubleshooting: SolarWinds Orion (NPM, NCM, NTA), Wireshark, SNMP (v2 & v3) Automation: Scripting and tools for disaster recovery, configuration, and deployment Protocols: BGP, EIGRP, OSPF, DMVPN, IPSec VPN, SSL VPN, NAT Responsibilities Network Architecture & Design Lead network design for multi-datacenter and hybrid Azure environments. Implement advanced Cisco routing and switching solutions. Ensure high availability and scalability across on-premise and cloud infrastructure. Firewall & Network Security Configure and manage Palo Alto and Cisco ASA firewalls, including packet inspection, VPNs, and access control policies. Design security architectures that comply with standards such as PCI, SOX, and GDPR. Utilize tools like Cisco ISE and Secure ACS for identity and access management. Cloud & SD-WAN Deploy and support Cisco Meraki SD-WAN for secure and optimized branch connectivity. Build hybrid connectivity between Azure Cloud and on-premise systems using VPN, ExpressRoute, and secure routing policies. Load Balancing & Traffic Management Design and manage F5 BIG-IP load balancers to ensure performance, redundancy, and failover. Implement global and local load balancing for distributed applications. Monitoring, Troubleshooting & Automation Utilize SolarWinds Orion suite (NPM, NCM, NTA), Wireshark, and SNMP tools for proactive monitoring and issue resolution. Lead root cause analysis and implement network automation for disaster recovery and configuration. Leadership & Collaboration Serve as a technical leader and mentor within the infrastructure team. Collaborate with security, cloud, and systems teams on integrated solutions. Minimum Qualifications Bachelor’s degree in Computer Science, Engineering, or related field (Master’s preferred). 8-10+ years in enterprise network engineering, with proven expertise in: Cisco network infrastructure (CCNP/CCIE preferred) Palo Alto firewall configuration (PCNSE a plus) Azure networking (ExpressRoute, VPNs) F5 LTM/GTM Meraki SD-WAN Familiarity with AWS and GCP networking (preferred). Strong background in network security, encryption, and compliance standards. Experience with network automation and DevOps principles. Certifications such as CCNP/CCIE, PCNSE, F5, Meraki, or Azure Networking are highly desirable.
Equal Opportunity Employer / Disabled / Protected Veterans The Know Your Rights poster is available here: The pay transparency policy is available here: For temporary assignments lasting 13 weeks or longer, AppleOne is pleased to offer major medical, dental, vision, 401k and any statutory sick pay where required. We are committed to working with and providing reasonable accommodations to individuals with disabilities. If you need a reasonable accommodation for any part of the employment process, please contact your staffing representative who will reach out to our HR team. AppleOne participates in the E-Verify program in certain locations as required by law. Learn more about the E-Verify program. We also consider for employment qualified applicants regardless of criminal histories, consistent with legal requirements, including, if applicable, the City of Los Angeles’ Fair Chance Initiative for Hiring Ordinance. Pursuant to applicable state and municipal Fair Chance Laws and Ordinances, we will consider for employment-qualified applicants with arrest and conviction records, including, if applicable, the San Francisco Fair Chance Ordinance. For Los Angeles, CA applicants: Qualified applications with arrest or conviction records will be considered for employment in accordance with the Los Angeles County Fair Chance Ordinance for Employers and the California Fair Chance Act.(none specified)
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