Network Engineer - Tier 3

AppGate Cybersecurity, Inc. • Phoenix, AZ

3d • Remote

About The Position

AppGate is seeking a remote Network Engineer to provide enterprise-level support for its Zero Trust Network Access (ZTNA) solution. The role requires deep networking and troubleshooting expertise to maintain customer deployments as cybersecurity needs and network environments evolve. The engineer will work with customer IT administrators, network engineers, CIOs and CISOs, and internal Deployment and Development teams, developing strong expertise in AppGate ZTNA and its capabilities.

Requirements

• Experience configuring, supporting, and managing broad and complex networks, including IPv4 and IPv6 addressing and subnetting, VLANs, network segmentation, DNS, DHCP, TCP, UDP, NAT, and routing protocols.
• Experience with packet capture and analysis tools such as Wireshark and tcpdump.
• Experience with VPN technologies, including IPsec, SSL/TLS, site-to-site, and remote access VPN.
• Experience with authentication protocols including LDAP, SAML, RADIUS, OIDC, and multi-factor authentication (MFA).
• Hands-on experience with network security platforms, including next-generation firewalls and IDS/IPS from multiple vendors such as Cisco, Check Point, Palo Alto Networks, CrowdStrike, and Zscaler.
• At least five years of enterprise technical support or network engineering experience, including two or more years in an escalation (L3) role.
• Excellent verbal and written communication skills, with the ability to bridge technical and business stakeholders.
• Ability to work as a cross-functional team member and independently, and to adapt quickly to changing situations.
• Customer-service orientation and ability to manage multiple projects at the same time.
• Strong problem-solving interest and good commercial sense when communicating with customers.

Nice To Haves

• Experience with cloud and virtualization platforms such as AWS, Azure, GCP, VMware, OpenStack, and Kubernetes.
• Experience with Windows, macOS, Linux, iOS, and Android.
• Background supporting enterprise security or networking products.
• Experience deploying or supporting ZTNA, secure access service edge (SASE), or SD-WAN architectures.
• Scripting experience in Python, Bash, or JavaScript for automation and log analysis.
• Industry certifications such as CCNP, Network+, or a cloud provider certification.

Responsibilities

• Own complex customer issues through resolution, restore AppGate ZTNA deployments to service, and advise on configuration best practices as a product subject-matter expert.
• Facilitate software deployment in customer environments and troubleshoot remote product installations.
• Collaborate with the Development team to analyze log files, identify potential root causes, and determine troubleshooting steps.
• Improve service reliability through root cause analysis and post-mortem or after-action reviews.
• Write knowledge base articles and technical documentation for the public customer knowledge base, and deliver technical presentations to customers and internal teams.
• Test and reproduce customer issues in internal and cloud-based lab environments using network simulation and validation tools.
• Maintain accurate, timely case records in the case management system.
• Serve as an escalation point for L2 support engineers, mentoring them and sharing knowledge.
• Participate in an on-call rotation with other support engineers.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed