Senior Network Engineer

Caliber Holdings•Lewisville, TX

About The Position

The Senior Network Engineer is responsible for designing, implementing, and operating a large-scale, multi-site enterprise network supporting ~1,800–2,000+ locations, corporate sites, and data-center /cloud connectivity. This role owns day-to-day network reliability and serves as a Tier 3 escalation point, leading incident response, root cause analysis, and permanent remediation to improve uptime and reduce repeat issues. The Senior Network Engineer also drives modernization efforts across SD-WAN, Wi-Fi, security edge, and cloud connectivity, partnering closely with carriers, Cisco/Meraki, and third-party field services to plan and execute changes at scale with strong standards, documentation, and change control discipline.

Requirements

Advanced proficiency in enterprise network design and operations across large, distributed environments.
Strong expertise in network security and firewall technologies (Cisco Firepower/FTD preferred).
Advanced proficiency in Azure network connectivity including ExpressRoute, with strong understanding of Megaport interconnect models.
Strong understanding of resilient routing design (BGP/OSPF) and traffic-path control.
Proven ability to troubleshoot complex network issues using packet captures and log correlation.
Strong organizational, documentation, and communication skills; proficiency in Microsoft Office including Visio.
Bachelor’s degree (BA/BS) in Computer Science or related field from four-year college or university; or 7+ years related experience and/or training; or equivalent combination of education and experience in a large enterprise network environment.
7+ years of experience in network engineering, including design and operational support of enterprise WAN/LAN/Wi-Fi environments.
5+ years of hands-on experience supporting Cisco networking solutions, with preference for Meraki-based distributed networks.
Experience supporting enterprise firewall platforms, including policy management and troubleshooting.
Experience supporting cloud connectivity and hybrid network designs, including ExpressRoute and third-party connectivity providers (e.g. Megaport , Equinix ).
CCIE Enterprise Infrastructure (required)

Nice To Haves

AZ-700 Microsoft Azure Network Engineer Associate (preferred)

Responsibilities

Design, implement, and support enterprise firewall /security platforms (Cisco Firepower/FTD preferred), including access control policies, NAT, HA/failover, and upgrade planning.
Design and operate hybrid cloud connectivity, including Azure ExpressRoute and Megaport , supporting multi-carrier interconnects, BGP peering, route advertisements, and validated failover across diverse transport providers.
Engineer and maintain resilient routing and traffic-path control across the enterprise network using OSPF, BGP, route filtering, summarization, and redistribution best practices.
Administer and support Cisco Meraki environments (MX, MR, MS, MG) at scale, including templates, configuration standards, firmware lifecycle planning, and large-scale troubleshooting.
Design, support, and optimize SD-WAN / AutoVPN connectivity, including resiliency models, hub/spoke architectures, routing behavior, and tunnel health validation.
Own WAN circuit lifecycle and carrier/vendor coordination, including turn-ups, outage escalation, demarcation troubleshooting, and restoration verification.
Implement and maintain network segmentation and security controls aligned to least-privilege principles across corporate, guest, and IoT environments.
Design, validate , and troubleshoot wireless solutions for indoor and outdoor deployments, applying RF fundamentals and performance optimization practices.
Lead complex incident troubleshooting using packet captures and log/event analysis; perform root cause analysis and drive permanent corrective actions.
Develop and maintain network automation using Python and/or PowerShell, leveraging APIs (e.g., Meraki Dashboard API) to improve reporting, compliance checks, and bulk-change efficiency.
Execute production network changes using formal change management practices, including implementation plans, rollback procedures, risk assessments, and pre/post validation.
Create and maintain network documentation, standards, diagrams, and runbooks; communicate technical updates clearly to both technical and non-technical stakeholders.
Serve as a Tier 3 escalation point, providing technical leadership, mentoring, and guidance to other engineers and operational teams.
Performs other duties as assigned.