Senior Network Security Engineer

Subject Matter Expert [L2 and L3 SME]

Job Location :
Chennai , Pune

Job Description  [For our premium client]

Experience : 5 to 15 Years

Desired Competencies (Technical/Behavioural Competency)

Routing & Switching (Cisco/Juniper – OEM’s) - DC
DC-Core Network Protocol BGP/OSPF concepts
Checkpoint Firewall – Network Security & VPN concepts
Cisco Wireless & SD WAN concepts
F5 LTM
DNS/DHCP, IPAM
CCNP, CCSA, F5 Certificate
Good-to-Have
Cisco Meraki
AWS Networking,
Cisco ISE & Security
NMS: BIG IQ, Solar Winds, CA Spectrum, Thousand eyes, Net Brain, Firewall Monitoring Tools (Checkpoint)

Responsibility of / Expectations from the Role

Candidates should have a strong working knowledge of OSI layers 1-7, with the ability to apply analytical and troubleshooting skill sets to solve complex problems across all networking disciplines
Monitor the performance and capability of the network using diversified tools. Identify the malfunctioning of hardware, software, and alerts events.
Triage or troubleshoot the issues & incident, within the defined areas. Follow Standard Operating Manuals and coordinate with third party vendors, customer contacts, or other IT teams to implement solutions and resolution.
Develop strong relationships with the customer and all other supporting departments.
Experience on supporting the Cisco WLAN Controllers, SSID and Access Points
Experience on Implementing and troubleshooting Firewalls Security, VPN’s, NAT policy, Software Patch management
Configuring and troubleshooting routing & switching protocols:
Set up and troubleshoot protocols like OSPF, BGP, EIGRP, VLANs, STPs, VRF, MC-LAG, FHRP,DMVPN, NAT Policy.
Solid understanding of LAN, WAN and SDWAN concepts (including wireless LAN) with experience in supporting enterprise class routers, switches in a global and enterprise network environment.
Experience on Implementing and troubleshooting Internal and External DNS, IPAM, DHCP for IP management.
Experience on Implementing and troubleshooting F5 LTM administration, SSL Certificate renewal, iRules creation, Software Upgrade & Patching
Proactive Analysis:
Review and analyze the DATA from Network Monitoring Tools to identify the best course of action to avert potential crises.
Test & Implement software patches & firmware for the network & security devices
Vendor or Supplier coordination, Problem-solving skills and ability to meet reasonable deadlines.
Major / High Severity Incidents management & Problem, Vendor Management

Role: L3 SME LAN/WAN (24x7, Remote during out of business hours, Rotational Shift)

Key Responsibilities:

Network Design & Architecture:
Lead the design and implementation of enterprise-level LAN, WAN, and wireless network solutions, ensuring alignment with organizational requirements and industry best practices.
Advanced Troubleshooting:
Provide expert-level troubleshooting support for complex network issues, including routing, switching, wireless connectivity, and firewall configurations.
Firewall Management:
Oversee and manage firewalls (Checkpoint, Cisco ASA, Palo Alto, etc.), ensuring secure network traffic and protecting the network from unauthorized access.
Optimization & Performance Tuning:
Continuously monitor and optimize the performance of LAN, WAN, and wireless networks, including managing network latency, bandwidth utilization, and high availability configurations.
Security Solutions:
Implement and maintain network security policies, firewalls, and VPNs to ensure the confidentiality, integrity, and availability of network resources.
Wireless Network Management:
Manage and optimize wireless networks, including site surveys, access point placement, and wireless security protocols (WPA3, WPA2, etc.).
Network Upgrades & Maintenance:
Plan and execute network upgrades, firmware patches, and hardware replacements to keep the network infrastructure up-to-date and secure.
Mentorship & Knowledge Transfer:
Provide technical guidance to junior engineers and support staff, fostering a culture of continuous learning and improvement.
Incident & Problem Management:
Lead the resolution of complex network-related incidents, ensuring timely identification, escalation, and resolution of issues impacting network…