Senior Technical Engineer at NLTS INDIA PVT LTD · Mumbai, Gurugram, Pune · 4 - 8 years · ₹5L - ₹12L / yr · Profitable · Posted 26 Feb 2026

We are seeking a Senior Technical Engineer to provide L2/L3 support for enterprise network infrastructure including SD-WAN, Security, Wireless, and NAC solutions.
Key Responsibilities
- Troubleshoot complex network issues (LAN/WAN/SD-WAN)
- Manage Firewall policies and security configurations
- Support Cisco ISE (NAC) deployments and troubleshooting
- Handle WiFi controller and access point configurations
- Work on Zscaler and secure internet gateway issues
- Coordinate with OEM/vendor TAC teams
- Perform root cause analysis (RCA)
- Guide junior engineers
Required Skills
- Strong knowledge of Routing & Switching
- Experience with SD-WAN (Viptela or similar)
- Firewall experience (Palo Alto / Fortinet / Cisco / Checkpoint)
- Cisco ISE knowledge
- Wireless troubleshooting experience
- Understanding of security best practices
Experience
- 4–8 years in Network Operations / Enterprise Networking

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We are looking for an experienced Senior Network Engineer with strong expertise in Cisco Routing & Switching and Core Networking. The candidate will support strategic network initiatives across Branch Data Access and Standalone ATM environments, ensuring network reliability, operational excellence, and risk reduction. The role involves technical leadership, project coordination, vendor management, and collaboration with cross-functional teams.
Responsibilities
- Design, configure, maintain, and troubleshoot Cisco routing and switching infrastructure.
- Support core networking operations across Branch Data Access and Standalone ATM environments.
- Lead network initiatives, project execution, and Branch Must-Win Battles.
- Manage and track the Book of Work (BoW) for Branch Data Access and Standalone ATM products.
- Coordinate with ATM Banking, Engineering Implementation teams, and service providers such as Verizon and AT&T.
- Identify and resolve complex network issues, minimize operational risks, and improve service reliability.
- Provide technical guidance and mentorship to junior network engineers.
- Collaborate with stakeholders to ensure successful project delivery and adherence to network standards and compliance requirements.
- Contribute to network strategy, governance, capacity planning, and continuous improvement initiatives.
Required Skills
- 7+ years of experience in Network Engineering.
- Strong hands-on experience with Cisco Routing & Switching.
- Good understanding of Core Networking, LAN/WAN, TCP/IP, VLANs, routing protocols, and network troubleshooting.
- Experience in network operations, incident management, and service reliability.
- Strong stakeholder coordination, vendor management, and project execution skills.
- Ability to lead technical initiatives and mentor junior engineers.
- Excellent communication, analytical, and problem-solving skills.
Job Summary:
We are looking for an experienced Senior Network Engineer with strong hands-on expertise in Cisco Routing & Switching and Core Networking. The role involves providing technical leadership, coordinating network engineering initiatives, improving network reliability, and supporting strategic projects across Branch Data Access and Standalone ATM network infrastructure.
Key Responsibilities:
- Provide technical leadership and operational coordination for network engineering initiatives related to Branch Data Access and Standalone ATM products.
- Support strategic network projects, including planning, implementation, and delivery of key initiatives.
- Oversee the Book of Work (BoW) related to Branch Data Access and Standalone ATM products.
- Collaborate with ATM Banking, Network Engineering, Implementation teams, and external service providers such as Verizon and AT&T.
- Analyze complex network engineering challenges and contribute to effective troubleshooting and resolution.
- Drive initiatives to reduce operational risks and improve network performance, stability, and service reliability.
- Coordinate with cross-functional stakeholders and vendors to ensure smooth project execution.
- Mentor junior engineers and support knowledge sharing within the team.
- Contribute to network strategy, governance, compliance, and continuous operational improvement.
Required Skills:
- Strong experience in Cisco Routing & Switching.
- Solid understanding of Core Networking concepts.
- Experience in network engineering, implementation, and troubleshooting.
- Experience coordinating network projects and working with cross-functional teams.
- Strong communication, stakeholder management, and problem-solving skills.
Job Description
Education Qualification
Label Value Education Qualification Engineer - B.E / B.Tech / MCA
Skills
Primary -> Technology | WAN/LAN/Security | 4 - Advanced
Primary -> Technology | Cisco | 4 - Advanced
Primary -> Technology | Palo alto | 4 - Advanced
Primary -> Technology | Fortinet | 4 - Advanced
Primary -> Technology | Meraki | 4 - Advanced
Secondary -> Technology | Zscaler | 4 - Advanced
Tertiary -> Technology | Cloud Networking | 4 -
Advanced Certification Technology | NSE4 | PCNSE | CCNP | ECMS1 | ZIA/ZPA - Admin | AZ-900/AWS solutions architect (associate)
Contract - 6 Months
Experience - 10-12 years
Qualifications
- 8+ years of relevant technical I.T. infrastructure or operations experience.
- Experience with, and ability to design, deploy, manage, and troubleshoot wireless & wired network equipment and protocols in a medium-large campus environment.
- In-depth knowledge in WAN transport systems/services, Telecommunications systems/service, LAN switch technology (including Spanning tree, VTP domain management), routing protocols (EIGRP, OSPF, BGP4), Software-Defined technology (SD-WAN).
- Proven ability to manage a multi-vendor WAN, multi-protocol routing, including but not limited to NHRP, EIGRP, BPG4, OSPF and RIPv2.
- Strong hands-on experience on Fortinet SD-WAN, Forti Switch/AP, Forti-Manager, Forti-Analyzer, Fortinet Firewalls.
- Hands-on experience on Switching, Wireless, Firewall and Load balancer technologies (Any OEM).
- Demonstrated ability to manage multiple projects in an efficient manner.
- Proven experience of LAN/WAN/Security design & implementation experience; completing projects wing2wing from planning>design>implementation.
- Work with project managers and other teams to achieve project deadlines.
- Demonstrated excellence in communications, presentation and customer focus skills.
- Certified in Fortinet NSE4 or higher.
Deliverables
- Understand / discuss solution with customer and internal technical teams.
- Take ownership of HLDs and LLDs for SDWAN implementations.
- Build customer relationships to gain a deep understanding of business and technical requirements.
- Implementation of solutions and achieve successful implementation within proposed Project timelines.
- Provide customers with technical guidance that is based on strong technical skills and informed by the customer’s needs.
- Help leads with process improvement – like pre-approved change template creation, effective implementation of internal processes.
- Act as technical mediator between Solutions Team, Product team to review new product implementation guides.
Job Summary:
We are looking for an experienced Senior Network Engineer with strong expertise in Cisco Routing & Switching and Core Networking. The ideal candidate will support enterprise network infrastructure initiatives, drive network reliability improvements, coordinate project delivery, and provide technical guidance to engineering teams.
Key Responsibilities:
- Support network engineering initiatives across Branch Data Access and Standalone ATM infrastructure.
- Provide technical leadership and guidance to network engineers, including mentoring junior team members.
- Manage and track the Book of Work (BoW) related to Branch Data Access and Standalone ATM products.
- Collaborate with ATM Banking, Engineering Implementation teams, and external service providers to ensure successful delivery of network initiatives.
- Coordinate with vendors such as Verizon and AT&T for network implementation, project execution, and operational support.
- Analyze complex network engineering challenges and contribute to effective resolutions.
- Identify and implement initiatives to reduce operational risks and improve network performance and service reliability.
- Participate in network planning, strategy, governance, and continuous improvement initiatives.
- Coordinate with cross-functional teams and client stakeholders to ensure timely delivery of network engineering projects.
- Ensure compliance with established network policies, procedures, and operational standards.
Required Skills:
- 7+ years of experience in Network Engineering.
- Strong hands-on experience in Cisco Routing & Switching.
- Solid understanding of Core Networking concepts and enterprise network infrastructure.
- Experience in network operations, troubleshooting, and issue resolution.
- Experience in network project coordination and infrastructure initiatives.
- Strong communication, stakeholder management, and collaboration skills.
- Ability to provide technical guidance and mentorship to junior engineers.
Preferred Skills:
- Experience supporting ATM and branch network infrastructure.
- Exposure to network service providers such as Verizon and AT&T.
- Experience in vendor coordination, network governance, and risk management.
- Experience managing network project portfolios and cross-functional initiatives.
Network Engineer – L3
Location: Mumbai | On-site
Experience: 8–10 Years
Key Responsibilities:
- Install, configure, maintain and troubleshoot network & security infrastructure.
- Handle LAN/WAN, BGP, OSPF, HSRP/VRRP, VLAN, STP, SVI & LACP.
- Manage Cisco/Juniper switches, routers and firewalls.
- Work on Fortinet/Checkpoint/Juniper/Cisco firewalls, SD-WAN & ACI-SDN.
- Troubleshoot VPN, NAT, GRE, P-VPN, routing and connectivity issues.
- Monitor network performance using NMS, SNMP & Syslog.
- Coordinate with customers, vendors and TAC teams for issue resolution.
- Support data centre connectivity, network projects and RFP specifications.
- Participate in network upgrades, maintenance and troubleshooting.
Key Skills:
- Strong TCP/IP, IPv4/IPv6, BGP, OSPF, HSRP/VRRP knowledge.
- Hands-on experience with Cisco/Juniper/Mellanox/Dell/Arista.
- Firewall experience with Fortinet/Checkpoint/Cisco/Juniper.
- Experience in Data Centre environments.
- Good communication and troubleshooting skills.
- Willingness to work in shifts, weekends and holidays.
Job Description – Network Engineer (Routing & Switching)
Experience: 7+ Years
Location: Hyderabad
Job Summary
We are looking for an experienced Network Engineer with strong hands-on expertise in Routing, Switching, and network troubleshooting to manage and maintain enterprise network infrastructure.
Key Responsibilities
- Configure, manage, and troubleshoot routers, switches, and network devices.
- Work on routing protocols such as BGP and OSPF.
- Manage LAN/WAN connectivity and resolve network issues.
- Monitor network performance and ensure network availability.
- Troubleshoot connectivity, routing, and switching issues.
- Collaborate with infrastructure and support teams to resolve network incidents.
Mandatory Skills
- 7+ years of experience in Networking.
- Strong hands-on experience in Routing and Switching.
- Knowledge of BGP and OSPF routing protocols.
- Experience with LAN/WAN and network troubleshooting.
- Good understanding of network infrastructure and protocols.
Work Location: Hyderabad
Job Title : Cisco DNAC Wireless L2+ Engineer
Location : Mumbai
Experience : 6 to 10 Years
Job Level : L2+
Work Mode : On-site / As per project requirements
Job Summary :
We are looking for an experienced Cisco DNAC Wireless L2+ Engineer with strong hands-on expertise in enterprise wireless infrastructure, Cisco Catalyst Center (formerly DNA Center/DNAC), Cisco Wireless LAN Controllers (WLC), Cisco Identity Services Engine (ISE), and Software-Defined Access (SD-Access/SDA).
The candidate will be responsible for managing, troubleshooting, optimizing, and supporting enterprise wireless and campus network environments, handling L2+ escalations, and ensuring network availability, performance, and security.
Mandatory skills :
Cisco DNAC / Catalyst Center, Cisco Wireless LAN Controllers (9800 Series), Cisco Access Points, Cisco ISE, SD-Access (SDA), Cisco Catalyst Switches, Routing & Switching, VLAN, STP, HSRP, OSPF, BGP, TCP/IP, DHCP, DNS, AAA, RF Troubleshooting, Wireless Optimization, Network Troubleshooting, Incident Management.
Key Responsibilities :
- Manage and support enterprise wireless infrastructure and Cisco-based campus networks.
- Handle L2+ escalations related to wireless, LAN, Cisco DNAC, and network connectivity issues.
- Configure, monitor, troubleshoot, and maintain Cisco Catalyst Center (DNAC) environments.
- Manage Cisco Wireless LAN Controllers (9800 series preferred), Cisco Access Points, and Cisco Catalyst switches.
- Configure and troubleshoot Cisco ISE integration, authentication, authorization, and access policies.
- Support and troubleshoot Cisco SD-Access (SDA) architecture and network segmentation.
- Perform wireless health analysis, RF optimization, coverage assessment, and interference troubleshooting.
- Resolve issues related to client onboarding, wireless roaming, authentication, DHCP, DNS, and application visibility.
- Implement network automation, device provisioning, and configuration management using DNAC workflows and templates.
- Perform software upgrades, patching, configuration backups, and network lifecycle management.
- Troubleshoot routing, switching, VLAN, and wireless connectivity issues using logs, packet captures, and network diagnostic tools.
- Coordinate with OEM Technical Assistance Center (TAC) teams and internal stakeholders during critical incidents.
- Participate in network design reviews, migrations, upgrades, and infrastructure transformation projects.
- Prepare and maintain High-Level Design (HLD), Low-Level Design (LLD), Standard Operating Procedures (SOPs), Root Cause Analysis (RCA), and operational documentation.
- Ensure compliance with network security policies, operational standards, and service-level agreements (SLAs).
- Mentor L1/L2 engineers and contribute to continuous improvement in network operations.
Mandatory Technical Skills :
- Cisco Catalyst Center / DNAC : Hands-on experience with configuration, monitoring, assurance, provisioning, and troubleshooting.
- Cisco Wireless : Strong experience with WLCs, preferably Cisco 9800 series, and Cisco Access Points.
- Cisco ISE : Experience with AAA, authentication, authorization, and wireless security integration.
- Cisco SD-Access (SDA) : Understanding of architecture, segmentation, and troubleshooting.
- Routing & Switching : Strong knowledge of VLANs, STP, HSRP, OSPF, BGP, and TCP/IP.
- Network Services : Working knowledge of DHCP, DNS, AAA, and enterprise network connectivity.
- Wireless Troubleshooting : RF analysis, roaming, client onboarding, interference, and coverage optimization.
- Network Diagnostics : Experience with packet analysis, incident management, and root cause identification.
Experience Requirements :
- 6+ years of overall networking experience.
- Minimum 3+ years of hands-on experience with Cisco DNAC / Catalyst Center and enterprise wireless environments.
- Experience handling L2+ escalations and complex network incidents.
- Practical experience supporting enterprise campus networks and business-critical infrastructure.
Preferred Certifications :
- CCNP Enterprise.
- Cisco certifications related to Catalyst Center, SD-Access, or enterprise wireless networking.
Good to Have :
- Experience working in large enterprise environments or managed services organizations.
- Exposure to Aruba or Juniper wireless solutions.
- Experience in customer-facing technical support and critical incident management.
- Knowledge of wireless survey tools and RF analysis utilities.
- Experience with network automation and configuration templates.
Required Soft Skills :
- Strong communication and stakeholder management skills.
- Excellent analytical, troubleshooting, and problem-solving abilities.
- Ability to work in a 24×7 support environment, including rotational shifts if required.
- Good technical documentation and presentation skills.
- Ability to mentor junior engineers and drive operational excellence.
Ideal Candidate : A hands-on networking professional with strong Cisco DNAC/Catalyst Center, enterprise wireless, WLC, ISE, and SDA expertise, capable of independently managing complex L2+ escalations and supporting enterprise network infrastructure.
Job Title: L2 Post-Sales Engineer – Cisco SSE (Secure Service Edge)
Department: Cybersecurity / Network Security
Location: Bangalore
Job Type: Full time
Gross Salary: 10 - 12 LPA
Experience: 3–5 Years
Key Responsibilities:
- Lead partial or full deployment of Cisco SSE components under guidance from senior engineers.
- Configure and optimize Cisco (ZTNA, SASE, SWG, CASB).
- Assist in integrating Cisco SD-WAN (Viptela/Meraki) into SSE frameworks.
- Perform Level 2 troubleshooting, including analysing logs, policy behaviour, and network flow.
- Engage directly with client IT teams to provide remote support, training, and resolution planning.
- Contribute to maintaining solution documentation, run books, and knowledge base.
- Participate in upgrade/migration projects and post-deployment optimization efforts.
Technical Skills Required:
- Good understanding of Cisco SD-WAN (routing, security policies, cloud integration).
- Familiarity with SASE architecture, ZTNA, SWG, CASB, and cloud security posture.
- Ability to perform log analysis, packet capture interpretation, and root cause diagnosis.
- Comfort with CLI and web-based interfaces of security/networking tools.
- Basic scripting/automation (Python, Shell) experience is a plus.
Certifications (Preferred but Not Mandatory):
- Cisco Certified Specialist – Security Core / CCNP Security
- Cisco Umbrella and Duo product training/certification
- Other SASE/SSE vendor exposure (Zscaler, Prisma, Netskope) is a plus
Job Summary
We are looking for an experienced Network Engineer with strong hands-on expertise in enterprise networking, cloud networking, network security, routing, switching, and troubleshooting. The candidate will be responsible for designing, implementing, maintaining, and optimizing secure and highly available network infrastructure across on-premises and cloud environments.
Key Responsibilities
- Design, configure, and manage enterprise network infrastructure, including routers, switches, firewalls and load balancers.
- Configure and troubleshoot routing protocols such as BGP, OSPF and static routing.
- Manage LAN, WAN, VLANs, VPNs, subnets, NAT, DNS and DHCP.
- Implement and support cloud networking across AWS and Azure, including VPC, VNet, route tables, Network Security Groups (NSGs), security groups and private endpoints.
- Configure site-to-site VPNs, remote-access VPNs, AWS Direct Connect and Azure ExpressRoute.
- Troubleshoot network connectivity, latency, packet loss, MTU issues and routing problems.
- Monitor network performance, availability and capacity using network monitoring tools.
- Implement network security policies, firewall rules, access controls and segmentation.
- Support hybrid cloud connectivity and on-premises-to-cloud network migration.
- Collaborate with infrastructure, cloud, security and application teams to resolve network incidents.
- Perform root cause analysis (RCA), document network configurations and maintain operational runbooks.
- Support change management, disaster recovery and high-availability requirements
Role Overview
We are looking for an experienced Network Security Engineer to design, implement, maintain, and secure enterprise network infrastructure. The role requires a strong understanding of network security principles, hands-on experience with security technologies, and the ability to troubleshoot complex network and security issues.
The ideal candidate will work closely with network, infrastructure, cloud, application, and security teams to ensure secure, resilient, and highly available network environments. The candidate should be comfortable handling security incidents, performing root-cause analysis, implementing security controls, and contributing to continuous improvement of the organization's network security posture.
Key Responsibilities
- Design, implement, configure, and maintain enterprise network security infrastructure.
- Manage and support network security technologies including firewalls, VPNs, IDS/IPS, secure gateways, and network access controls.
- Configure and maintain security policies, access rules, NAT, VPN tunnels, and related network security controls.
- Monitor network traffic and security events to identify potential threats, anomalies, and unauthorized access.
- Troubleshoot complex network connectivity and security-related issues and perform root-cause analysis.
- Investigate and respond to network security incidents in coordination with security and infrastructure teams.
- Review firewall and network security rules regularly and ensure they follow established security standards and business requirements.
- Support secure connectivity across data centers, corporate networks, remote locations, cloud environments, and third-party networks.
- Participate in network security assessments, vulnerability remediation, and security hardening activities.
- Implement and maintain network segmentation and access-control mechanisms.
- Work with internal teams to assess security requirements for new applications, infrastructure, and network changes.
- Participate in change management, implementation, and post-change validation activities.
- Maintain network security documentation, architecture diagrams, configurations, and operational procedures.
- Contribute to security improvement initiatives, automation, standardization, and operational efficiency.
- Work with vendors and technology partners for issue resolution, upgrades, and technical escalations.
- Ensure network security operations align with organizational policies, industry standards, and compliance requirements.
Required Skills
- Strong experience in network security engineering and enterprise networking.
- Good understanding of TCP/IP, DNS, DHCP, HTTP/HTTPS, routing, switching, VLANs, and network protocols.
- Hands-on experience with enterprise firewalls and security gateways.
- Strong understanding of VPN technologies, IPsec, SSL/TLS, NAT, and access-control policies.
- Experience with IDS/IPS, network monitoring, traffic analysis, and security event investigation.
- Experience troubleshooting network and security issues across complex environments.
- Good understanding of network security architecture, segmentation, and secure connectivity.
- Experience with incident management, change management, and root-cause analysis.
- Familiarity with security best practices, vulnerability management, and network hardening.
- Strong analytical, troubleshooting, and problem-solving skills.
- Good written and verbal communication skills with the ability to work effectively with technical and non-technical stakeholders.
Preferred Skills
- Experience with security technologies from vendors such as Palo Alto, Fortinet, Cisco, Check Point, or similar.
- Exposure to cloud networking and cloud security across AWS, Azure, or GCP.
- Knowledge of Zero Trust, SASE, SD-WAN, or network access control concepts.
- Experience with security monitoring/SIEM platforms.
- Exposure to scripting or automation using Python, PowerShell, or similar technologies.
- Relevant certifications such as CCNA/CCNP Security, PCNSE, Fortinet certifications, or equivalent are an advantage.
Key Competencies
- Network Security Engineering
- Enterprise Network Troubleshooting
- Firewall & VPN Management
- Security Incident Handling
- Network Monitoring & Analysis
- Security Hardening
- Root-Cause Analysis
- Risk & Vulnerability Awareness
- Change & Configuration Management
- Stakeholder Communication
- Problem Solving
- Documentation & Process Discipline









