Network Engineer

4 days ago

Chennai, Tamil Nadu, India VOIZ | voizworks Full time ₹ 6,00,000 - ₹ 18,00,000 per year

Job title: Lead - Network Engineer

Skill: Switching (VLAN, STP)

Firewall - Cisco ASA, Fortinet FortiGate, Checkpoint

SD WAN - Fortinet SD-WAN

Wireless - Cisco WLC, Aruba, Meraki, DNS/DHCP/NT PFirewall / VPN / IPS / Zscaler

Experience: 9 to 15 years

Location: Mumbai

Workdays: 5 days working

Job Summary:

We are looking for a skilled and strategic Lead Network & Security Engineer to architect,

manage, and secure enterprise-wide network systems. This senior role demands deep technical

expertise across firewalls, VPN, IPS, Zscaler cloud security, switching technologies, SD-WAN,

and wireless solutions. You'll lead design initiatives, mentor engineers, and ensure robust

security postures across complex hybrid environments.

Key Responsibilities:

Design and manage firewall deployments using Cisco ASA, Fortinet FortiGate, and Checkpoint,

including advanced rulebase optimization and threat mitigation

Architect, configure, and monitor VPN solutions (IPsec, SSL VPN) for secure connectivity

across global networks

Oversee implementation and tuning of Intrusion Prevention Systems (IPS) to defend against

evolving threats

Administer and optimize Zscaler Internet Access (ZIA) and Private Access (ZPA) policies for

cloud security and access control

Lead Layer 2/3 switching operations, including VLAN configuration, Spanning Tree Protocol

(STP) tuning, and traffic segmentation

Deploy and maintain Fortinet SD-WAN solutions for resilient connectivity and bandwidth

optimization

Manage enterprise wireless infrastructure across Cisco Wireless LAN Controller (WLC), Aruba,

and Meraki platforms for performance and security

Ensure reliable and secure operation of network services like DNS, DHCP, NTP, including

redundancy and fault-tolerance

Conduct network risk assessments, penetration testing coordination, and remediation planning

Collaborate with cross-functional teams on security posture improvements, incident response

strategy, and zero-trust architecture

Document network diagrams, policies, procedures, and change requests with a focus on audit

readiness

Required Skills:

Advanced experience in firewall rule audits, traffic shaping, and security policy enforcement

Strong knowledge of Zscaler cloud security architecture and integration ; Scripting or

automation (Python, Bash, PowerShell) is a plus

Proficiency in VLAN routing, trunking, STP troubleshooting, and link redundancy

Solid command of SD-WAN architectures, overlay networks, and branch-office deployments

Familiarity with wireless authentication protocols, RF optimization, and controller-based

management

Competent in core services like DNS zone management, DHCP scopes, and NTP

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