Network Engineer

The Senior Infrastructure & Network Engineer

• Designing, configuring, maintaining, and troubleshooting Cisco network infrastructure across all Firm offices and supporting environments
• Serving as a senior technical escalation point for Cisco switching, firewalls, routing, and connectivity issues
• Performing advanced Cisco IOS and NX-OS command-line configuration and troubleshooting
• Configuring and managing Cisco switches, including VLANs, trunks, port channels, spanning tree, routing, access ports, uplinks, and high-availability configurations
• Configuring and managing Palo Alto Networks firewall technologies, including access rules, NAT, VPN, routing, segmentation, and failover
• Supporting network segmentation and securing connectivity requirements in coordination with the Firm’s Security team
• Designing, deploying, troubleshooting and supporting LAN and WAN connectivity across all Firm offices
• Developing network designs, port maps, rack layouts, IP addressing plans, VLAN structures, and connectivity diagrams for new and existing offices
• Coordinating with cabling vendors, telecom providers, carriers, building management, and technology partners during office construction and buildout projects
• Provisioning, configuring, testing, and supporting internet, MPLS, SD-WAN, Ethernet, Direct Internet Access, and other carrier circuits
• Working directly with internet service providers and telecom carriers on new circuit installations, upgrades, troubleshooting, outages, and service escalations
• Configuring routing, failover, redundancy, and monitoring for primary and secondary internet circuits
• Supporting hybrid connectivity between Firm offices, cloud environments, and hosted systems
• Configuring and troubleshooting TCP/IP, routing, switching, DNS, DHCP, VLANs, subnetting, NAT, ACLs, VPNs, and related network technologies
• Using packet captures, interface statistics, logs, command-line diagnostics, and network monitoring tools to isolate and resolve connectivity issues
• Managing and supporting Meraki wireless infrastructure across Firm offices; configuring wireless access points, SSIDs, VLAN assignments, authentication, security settings, RF settings, and site-specific policies
• Performing wireless troubleshooting, coverage analysis, interference troubleshooting, and access point optimization
• Supporting network connectivity for conference rooms, phones, printers, security devices, building systems, and other office technology
• Implementing and maintaining network monitoring, alerting, configuration backups, and documentation
• Maintaining accurate network diagrams, IP address documentation, circuit inventories, configuration records, and operational procedures
• Developing and maintaining standardized network configurations and deployment templates.
• Reviewing existing network designs and recommend improvements to reliability, redundancy, security, performance, and supportability
• Participating in network architecture reviews for new systems, applications, cloud services, and technology initiatives
• Supporting network connectivity to AWS and other cloud environments as required
• Assisting with firewall, VPN, remote access, and secure connectivity projects in coordination with Security and Engineering teams
• Performing firmware and software upgrades for network infrastructure while minimizing operational disruption
• Leading troubleshooting during network outages and critical infrastructure incidents.
• Participating in root-cause analysis and developing corrective actions following major incidents
• Coordinating maintenance windows, implementation plans, testing, rollback procedures, and change-control documentation for network changes
• Collaborating with service desk and desktop teams to resolve user-facing connectivity issues that require advanced network troubleshooting
• Participating in after-hours maintenance, project work, and critical incident response when required

Qualifications

• Bachelor’s degree in Information Technology, Computer Science, Engineering, or related discipline, or equivalent professional experience
• 8+ years of progressive experience in network engineering, infrastructure engineering, enterprise networking, or related disciplines supporting complex, multi-office enterprise network environments
• Cisco certifications such as CCNP Enterprise, CCNP Security, or equivalent advanced Cisco experience strongly preferred
• Experience supporting legal, financial-services, or similarly regulated enterprise environments preferred
• Expert-level Cisco command-line configuration and troubleshooting experience is required
• Deep experience with Cisco IOS and NX-OS is required
• Strong experience configuring and troubleshooting Cisco switches and Palo Alto Networks firewalls
• Strong understanding of Layer 2 and Layer 3 networking, including VLANs, trunks, spanning tree, port channels, static routing, dynamic routing, subnetting, and network segmentation
• Strong understanding of TCP/IP, DNS, DHCP, NAT, ACLs, VPNs, and enterprise routing concepts
• Advanced troubleshooting ability using Cisco CLI commands, logs, packet captures, interface statistics, and network monitoring tools
• Experience designing and supporting redundant and highly available network architectures
• Experience working with ISPs and telecom carriers to provision and troubleshoot internet and WAN circuits
• Strong knowledge of carrier circuits, handoffs, demarcation points, public IP addressing, BGP/static routing concepts, and redundant circuit design
• Strong troubleshooting skills for wired and wireless LAN connectivity
• Ability to diagnose issues spanning user devices, switching, routing, firewalls, wireless systems, carrier circuits, servers, and cloud connectivity
• Strong understanding of enterprise network security principles and network segmentation
• Experience maintaining network diagrams, configuration standards, IP addressing plans, and technical documentation
• Strong change-management discipline, including implementation plans, testing procedures, and rollback planning
• Ability to work independently during complex troubleshooting and outages while communicating clearly with senior IT leadership and business stakeholders
• Strong vendor and carrier-management experience
• Excellent analytical, problem-solving, and critical-thinking skills
• Ability to remain deeply hands-on while also providing senior technical leadership and mentoring
• Experience with Cisco Catalyst and Nexus switching platforms, AWS Direct Connect, and VoIP and unified communications network requirements is preferred
• Competency to work in a fact-paced environment requiring high availability and minimal tolerance for network downtime
• Flexibility to adjust hours to meet operating and business needs