Network Engineer L3

Job Description: Network Engineer L3

Job Title Network Engineer –

L3 Experience 7–12 years Location [Pune, Mumbai]

Employment Type Full-time

Job Summary :

We are seeking an experienced L3 Network Engineer with strong expertise in enterprise networking, wireless infrastructure, security, and data center technologies. The ideal candidate will possess advanced troubleshooting skills and hands-on experience with Aruba, Juniper, Cisco, wireless solutions, firewalls, routing, and switching. The candidate will be responsible for designing, implementing, optimizing, and supporting complex network environments while ensuring high availability, security, and performance.

Key Responsibilities:

Design, implement, and support enterprise LAN, WAN, WLAN, and data center networks.

Provide L3 support for complex network incidents, performance issues, and escalations.

Configure, troubleshoot, and optimize Aruba wired and wireless infrastructure.

Administer and troubleshoot Juniper networking solutions, including routers, switches, and security devices.

Manage Juniper MX Series (Major) routers and enterprise routing platforms.

Configure and maintain Cisco routers, switches, and wireless controllers.

Deploy, manage, and troubleshoot enterprise Wireless networks, including RF optimization, roaming, and highdensity deployments.

Configure and support enterprise Firewalls, VPNs, NAT, ACLs, and security policies.

Perform network capacity planning, performance tuning, and root cause analysis.

Implement network redundancy, high availability, and disaster recovery solutions.

Monitor network health using enterprise monitoring tools and proactively resolve issues.

Collaborate with security, infrastructure, cloud, and application teams during projects and incidents.

Prepare network documentation, diagrams, SOPs, and technical reports.

Participate in change management, maintenance activities, and on-call support.

Required Technical Skills :

Strong hands-on experience with Aruba switches, controllers, and wireless access points.

Advanced knowledge of Juniper routing and switching.

Experience managing Juniper MX Series routers and enterprise networking solutions.

Strong expertise in Cisco routing, switching, and wireless technologies.

Extensive experience with enterprise Wireless deployments and troubleshooting.

Hands-on experience with enterprise Firewalls (Juniper SRX, Cisco Firepower/ASA, Palo Alto, or Fortinet).

Deep understanding of:

TCP/IP,

Routing Protocols (BGP, OSPF, EIGRP, IS-IS),

VLANs, STP, VRRP/HSRP

MPLS

VPN Technologies (IPSec, SSL VPN)

QoS

Multicast

Network Security

DNS, DHCP, NAT

Experience with network monitoring and management tools such as SolarWinds, PRTG, Nagios, or similar.

Experience with automation using Python, Ansible, or scripting is an added advantage.

Knowledge of cloud networking (AWS, Azure, or GCP) is preferred.

Required Qualifications:

Bachelor's degree in Computer Science, Information Technology, Electronics, or a related field.

7–12 years of enterprise networking experience.

Excellent analytical and troubleshooting skills.

Strong communication and stakeholder management skills.

Preferred Certifications :

Aruba Certified Professional (ACP/ACMX)

Juniper Networks Certified Professional (JNCIP/JNCIE)

Cisco CCNP Enterprise or CCIE Enterprise Infrastructure

Firewall certifications (Palo Alto PCNSE, Fortinet NSE, or equivalent)

Desired Candidate Profile :

Strong experience in enterprise network design and implementation.

Excellent problem-solving and incident management capabilities.

Ability to handle critical production environments independently.

Experience working in ITIL-based support environments.

Strong documentation and technical presentation skills.

Ability to mentor L1/L2 engineers and lead technical discussions. I