About us

Join us at Orange Business!
We are a network and digital integrator that understands the entire value chain of the digital world, freeing our customers to focus on the strategic initiatives that shape their business.
Every day, you will collaborate with a team dedicated to providing consistent, sustainable global solutions, no matter where our customers operate. With over 30,000 employees across Asia, the Americas, Africa, and Europe, we offer a dynamic environment to develop and perfect your skills in a field filled with exciting challenges and opportunities.

About the role

We are looking for an experienced Network Security Engineer to provide advanced technical support and administration for enterprise Data Centre, Network and Security infrastructure.

The role will be responsible for L3 troubleshooting, complex incident resolution, root cause analysis, network/security implementation, infrastructure upgrades, change management, technical documentation, OEM coordination and mentoring of L1/L2 engineers.

The candidate should have strong hands-on experience in Cisco Nexus Data Centre switching, routing, load balancing, firewalls and enterprise network security and should be capable of independently handling critical production issues in a 24 7 Data Centre environment.

Provide L3 technical support for enterprise Network and Security infrastructure.

Troubleshoot and resolve complex network and security incidents.

Act as the technical escalation point for L1/L2 teams.

Support critical production incidents and participate in major incident bridges.

Perform detailed troubleshooting using logs, packet captures, device statistics and configuration analysis.

Ensure timely restoration of services while maintaining proper change and security procedures.

2. Cisco Data Centre Networking

Strong hands-on experience with Cisco Nexus switches, including:

Cisco Nexus 9000 series

Layer 2 and Layer 3 configuration

VLAN, trunking and EtherChannel

STP/RSTP

vPC and vPC peer-link

HSRP

Inter-VLAN routing

OSPF and BGP

VRF

VXLAN/EVPN concepts

NDFC administration and troubleshooting

Interface, port-channel and transceiver troubleshooting





Nexus upgrade and migration activities

Responsibilities include:

Troubleshooting complex Nexus L2/L3 issues.

Troubleshooting vPC, peer-link and keepalive-related issues.

Troubleshooting routing and forwarding problems.

Supporting Data Centre fabric implementation and expansion.

Performing configuration reviews and optimization.

Supporting Nexus/NDFC upgrades and migration activities.

3. Routing WAN

Advanced troubleshooting of enterprise routing environments.

Troubleshoot routing adjacency and route propagation issues.

Troubleshoot inter-Data Centre connectivity.

Support DR connectivity and network failover activities.

4. Load Balancer Administration

Hands-on experience with enterprise load-balancing technologies such as:

Radware Alteon

Responsibilities include:

VIP creation and troubleshooting.

Server pool and member configuration.

Health monitor configuration.

Load-balancing method and persistence troubleshooting.

NAT and SNAT configuration.

SSL offloading concepts.

GSLB configuration and troubleshooting.

Troubleshooting application connectivity through load balancers.

Supporting planned migrations and DR/failover activities.

5. Antivirus/Security

Provide L3 support for Trend micro antivirus, SPS, TMDSM, etc.

Responsibilities include:

Firewall rule troubleshooting and analysis.

NAT and security-policy troubleshooting.

Application/service connectivity troubleshooting.

Log analysis and traffic-flow verification.

Coordinate with Security teams for security incidents.

Ensure network changes follow security and compliance requirements.

About you

8+ years of experience in Network Security / Infrastructure operations.

Strong L2/L3 enterprise networking experience.

Significant experience in Data Centre network environments.





Experience handling critical incidents and complex technical escalations.

Experience with network implementation, upgrades and migration projects.

Experience working with OEM/TAC and multiple technology teams.

Experience providing technical guidance to L1/L2 engineers.

Preferred certifications include:

CCNA

CCNP Enterprise

Cisco Certified Specialist - Enterprise Core

Relevant firewall/security certifications

Relevant Radware certifications

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Educational Qualification

Bachelors degree in Computer Science, Information Technology, Electronics, Telecommunications or a related technical field.

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Key Competencies

Advanced network troubleshooting

Strong analytical and RCA skills

Critical incident handling

Problem-solving and decision-making

Network security awareness

Technical ownership

Strong communication and stakeholder management

Vendor/OEM coordination

Technical documentation

Team mentoring and knowledge sharing

Ability to work under pressure in a 24 7 Data Centre environment

You bring open mindedness, ability to handle pressure, leading with courage and empathy, assertiveness and communicate effectively.

What we offer

- Global Opportunities: Work in multi-national teams with opportunity to collaborate with colleagues and customers from all over the world.
- Versatile Work Environment: Flexible working hours and possibility to combine work from office and home (hybrid ways of working).
- Professional Development: training programs and upskilling/re-skilling opportunities.
- Career Growth: Internal growth and mobility opportunities within Orange.
- Caring and Daring Culture: Health and well-being programs and benefits, diversity inclusion initiatives, CSR and employee connect events.
- Reward Programs: Employee Referral Program, Change Maker Awards.

Only your skills matter

Disclaimer: This job posting has been aggregated from external source. Role details, content, and availability are subject to change. Applicants are advised to confirm the latest information directly on the company website before applying.

📌 Technical Solution Expert (Mumbai)
🏢 Orange
📍 Mumbai