Senior Network / Firewall Engineer - Houston, TX

Zedcor Security Solutions•Houston, TX

1d•$110,000 - $130,000•Onsite

About The Position

The Senior Network / Firewall Engineer will design, build, secure, and maintain a large-scale hybrid network environment. This is not an entry-level role. The successful candidate must be able to solve complex technical problems under pressure and operate with cybersecurity, uptime, encryption, monitoring, and compliance in mind. The environment includes Azure VPN Gateway, Azure Networking, Sophos firewalls, Cradlepoint routers, switches, Wi-Fi, F5 BIG-IP, Azure WAF, Azure Application Gateway, Azure Front Door, centralized logging, centralized monitoring, and internal PKI.

Requirements

5+ years of hands-on network engineering, firewall engineering, or network security engineering experience.
Local Houston-area candidate able to work in office 5 days per week.
Strong Azure Networking experience, including Azure VPN Gateway, virtual networks, routing, NSGs, private connectivity, and hybrid networking.
Strong experience with Sophos or another major enterprise firewall platform such as Fortinet, Palo Alto, Cisco, or Check Point.
Strong knowledge of IPsec VPNs, SSL VPNs, routing, switching, segmentation, firewall policies, NAT, high availability, and secure remote access.
Hands-on experience with BGP and dynamic routing.
Solid understanding of DNS and DHCP design, troubleshooting, and security best practices.
Understanding of why DNS and DHCP should not be hosted directly on firewalls, including separation of duties, availability, scalability, logging, auditability, and change-control risks.
Strong understanding of encryption, PKI, certificate-based authentication, secure management access, and network security best practices.
Ability to troubleshoot complex production issues under pressure.
Ability to work full-time on-site in Houston, Texas.

Nice To Haves

Sophos firewall experience.
Cradlepoint or large-scale cellular router experience.
F5 BIG-IP, WAF, load-balancing, Azure WAF, Azure Application Gateway, or Azure Front Door experience.
Azure Monitor, Microsoft Sentinel, Defender for Cloud, Intune, or similar monitoring/security tooling experience.
Enterprise PKI and certificate lifecycle experience.
Certifications such as CCNP, CCNA, NSE, PCNSE, Sophos, Azure Network Engineer Associate, Security+, CISSP, or equivalent practical experience.

Responsibilities

Design, build, maintain, and troubleshoot IPsec and SSL VPN networks.
Support Azure VPN Gateway, Azure Networking, Sophos firewalls, Cradlepoint, switches, Wi-Fi, WAF, and load-balancing platforms.
Manage and support a Cradlepoint environment of 20,000+ devices.
Configure and troubleshoot dynamic routing, including internal BGP.
Manage Sophos firewalls or become proficient with Sophos within the first 30 days if experienced with another major firewall platform.
Support F5 BIG-IP, Azure WAF, Azure Application Gateway, and Azure Front Door.
Ensure DNS and DHCP are centrally managed, monitored, logged, secured, and not hosted directly on firewalls.
Ensure firewalls are used as security enforcement points, not as core infrastructure service providers.
Patch, monitor, log, audit, and secure network infrastructure.
Maintain centralized logging, centralized audit logging, centralized authentication, centralized monitoring, and alerting.
Ensure network links, management access, VPNs, and sensitive data flows are encrypted.
Use Zedcor’s internal PKI solution for device identity, certificates, authentication, encryption, and secure management.
Document network designs, firewall rules, routing policies, VPN configurations, standards, and runbooks.
Support incident response, change management, vulnerability remediation, disaster recovery, SOC 2, FedRAMP, and StateRAMP readiness.