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We are seeking a Senior Network Security Engineer to design, implement, and support secure network infrastructures across multiple client environments. This role is responsible for maintaining high-performing network systems while ensuring strong security controls, segmentation, and threat visibility across enterprise networks. The ideal candidate has deep experience working within managed services or multi-client environments, supporting complex networking infrastructures and implementing security best practices. This position requires someone comfortable troubleshooting advanced network issues, designing secure architectures, and acting as a senior escalation point for critical incidents.
Job Responsibility:
Design, deploy, and maintain network infrastructure including routers, switches, wireless networks, and firewalls across multiple client environments
Support enterprise LAN, WAN, and wireless connectivity systems to ensure high availability and performance
Implement and manage networking protocols such as TCP/IP, VLANs, QoS, RSTP, LACP/LAG, and multicast technologies
Implement and maintain network security controls across switching, wireless, and firewall platforms
Design secure network segmentation strategies including VLAN segmentation, micro-segmentation, and multi-tenant network architectures
Configure and manage firewall policies, NAT rules, and security filtering using least-privilege access principles
Implement secure wireless network authentication methods including WPA2/WPA3 enterprise authentication and RADIUS-based access controls
Design and maintain private wireless networks supporting role-based or device-based access policies
Support modern access control frameworks including Zero Trust Network Access (ZTNA) approaches
Implement network access controls such as 802.1X authentication, device profiling, and endpoint-based access policies
Monitor network traffic and security events using network analytics tools and firewall telemetry
Identify suspicious activity through log analysis, flow monitoring, and threat intelligence indicators
Coordinate with security or incident response teams to investigate potential threats and implement containment actions
Serve as a Tier 3 escalation point for complex network troubleshooting and infrastructure issues
Diagnose and resolve connectivity problems involving routing, switching, wireless networks, and firewall systems
Support proactive monitoring and preventative maintenance to maximize uptime
Onboard and maintain network infrastructure within monitoring platforms for inventory tracking, alerting, and configuration management
Analyze network alerts and performance metrics to identify potential issues before service disruption occurs
Maintain detailed documentation of network configurations, security policies, and infrastructure changes
Participate in change management reviews and ensure proper documentation for infrastructure updates
Work closely with internal engineers and client stakeholders to resolve infrastructure challenges and implement new solutions
Provide technical guidance and communicate complex technical findings clearly to both technical and non-technical audiences
Requirements:
5–7+ years of experience designing, implementing, and supporting network infrastructure environments
Strong background in network security, firewall administration, routing, and switching technologies
Experience working in a Managed Service Provider (MSP) or multi-client environment supporting multiple networks
Advanced knowledge of networking protocols and technologies including TCP/IP, DNS, NAT/PAT, VLANs, QoS, routing, and switching concepts
Experience implementing secure network segmentation and layered security controls across network infrastructure
Hands-on experience with enterprise firewall platforms and network security policies
Strong troubleshooting and diagnostic skills across complex network environments
Ability to communicate effectively with both technical teams and client stakeholders
Experience with networking and wireless platforms from vendors such as Meraki, Fortinet, Ubiquiti, Ruckus, Aruba, Cisco, or similar technologies
Experience with firewall platforms such as Fortinet, Palo Alto, SonicWall, or comparable solutions
Familiarity with network monitoring and analytics platforms used for infrastructure visibility and alerting
Networking certifications such as CCNA, CCNP, Network+, or similar credentials
Associate or Bachelor’s degree in Information Technology, Computer Information Systems, or a related field
Nice to have:
Experience designing secure network architectures and micro-segmentation strategies
Candidates should be comfortable working in client-facing environments supporting multiple organizations