Sr Administrator (Support & Operations)
India
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Job Description
Sr Administrator (Support & Operations)
Bengaluru, Karnataka

Job Summary

Position Summary The NAC Engineer is responsible for designing, deploying, managing, and supporting Network Access Control solutions to ensure secure access to corporate networks. This role works closely with security, network, and infrastructure teams to enforce endpoint compliance, authentication policies, and zero-trust access frameworks. Key Responsibilities 1. NAC Operations & Administration Implement, configure, and maintain NAC solutions Manage authentication services including 802.1X, EAP protocols, RADIUS, and TACACS+. Monitor and optimize network access policies, segmentation rules, and device onboarding workflows. 2. Security & Compliance Enforcement Enforce endpoint security compliance (antivirus, posture checks, OS version, patch levels). Define and maintain zero-trust network access rules. Integrate NAC with SIEM, MDM, and identity management platforms. 3. Troubleshooting & Support Troubleshoot authentication failures, profiling issues, and device onboarding problems. Provide L2/L3 operational support for network access and security incidents. Collaborate with networking teams during escalations and root-cause analysis. 4. Network Integration Work with switching, wireless, firewall, and VPN teams to apply NAC policies across the environment. Configure switchport templates, VLAN assignments, CoA, and dynamic ACLs. Support BYOD onboarding portals and guest access provisioning. 5. Documentation & Governance Maintain documentation for NAC policies, network diagrams, SOPs, and deployment standards. Assist in audits, compliance checks, and risk assessments. Required Skills & Experience Hands-on experience with one or more NAC platforms: Cisco ISE Strong knowledge of: 802.1X, RADIUS, TACACS+ VLANs, DHCP, DNS Network protocols (TCP/IP, SNMP, LLDP/CDP) Endpoint posture assessment Experience integrating NAC with: Active Directory / Azure AD MDM (Intune, Workspace ONE) SIEM solutions Ability to analyze logs, packets, and authentication flows.

Key Responsibilities

Position Summary The NAC Engineer is responsible for designing, deploying, managing, and supporting Network Access Control solutions to ensure secure access to corporate networks. This role works closely with security, network, and infrastructure teams to enforce endpoint compliance, authentication policies, and zero-trust access frameworks. Key Responsibilities 1. NAC Operations & Administration Implement, configure, and maintain NAC solutions Manage authentication services including 802.1X, EAP protocols, RADIUS, and TACACS+. Monitor and optimize network access policies, segmentation rules, and device onboarding workflows. 2. Security & Compliance Enforcement Enforce endpoint security compliance (antivirus, posture checks, OS version, patch levels). Define and maintain zero-trust network access rules. Integrate NAC with SIEM, MDM, and identity management platforms. 3. Troubleshooting & Support Troubleshoot authentication failures, profiling issues, and device onboarding problems. Provide L2/L3 operational support for network access and security incidents. Collaborate with networking teams during escalations and root-cause analysis. 4. Network Integration Work with switching, wireless, firewall, and VPN teams to apply NAC policies across the environment. Configure switchport templates, VLAN assignments, CoA, and dynamic ACLs. Support BYOD onboarding portals and guest access provisioning. 5. Documentation & Governance Maintain documentation for NAC policies, network diagrams, SOPs, and deployment standards. Assist in audits, compliance checks, and risk assessments. Required Skills & Experience Hands-on experience with one or more NAC platforms: Cisco ISE Strong knowledge of: 802.1X, RADIUS, TACACS+ VLANs, DHCP, DNS Network protocols (TCP/IP, SNMP, LLDP/CDP) Endpoint posture assessment Experience integrating NAC with: Active Directory / Azure AD MDM (Intune, Workspace ONE) SIEM solutions Ability to analyze logs, packets, and authentication flows.

Skill Requirements

Position Summary The NAC Engineer is responsible for designing, deploying, managing, and supporting Network Access Control solutions to ensure secure access to corporate networks. This role works closely with security, network, and infrastructure teams to enforce endpoint compliance, authentication policies, and zero-trust access frameworks. Key Responsibilities 1. NAC Operations & Administration Implement, configure, and maintain NAC solutions Manage authentication services including 802.1X, EAP protocols, RADIUS, and TACACS+. Monitor and optimize network access policies, segmentation rules, and device onboarding workflows. 2. Security & Compliance Enforcement Enforce endpoint security compliance (antivirus, posture checks, OS version, patch levels). Define and maintain zero-trust network access rules. Integrate NAC with SIEM, MDM, and identity management platforms. 3. Troubleshooting & Support Troubleshoot authentication failures, profiling issues, and device onboarding problems. Provide L2/L3 operational support for network access and security incidents. Collaborate with networking teams during escalations and root-cause analysis. 4. Network Integration Work with switching, wireless, firewall, and VPN teams to apply NAC policies across the environment. Configure switchport templates, VLAN assignments, CoA, and dynamic ACLs. Support BYOD onboarding portals and guest access provisioning. 5. Documentation & Governance Maintain documentation for NAC policies, network diagrams, SOPs, and deployment standards. Assist in audits, compliance checks, and risk assessments. Required Skills & Experience Hands-on experience with one or more NAC platforms: Cisco ISE Strong knowledge of: 802.1X, RADIUS, TACACS+ VLANs, DHCP, DNS Network protocols (TCP/IP, SNMP, LLDP/CDP) Endpoint posture assessment Experience integrating NAC with: Active Directory / Azure AD MDM (Intune, Workspace ONE) SIEM solutions Ability to analyze logs, packets, and authentication flows.

Other Requirements

Position Summary The NAC Engineer is responsible for designing, deploying, managing, and supporting Network Access Control solutions to ensure secure access to corporate networks. This role works closely with security, network, and infrastructure teams to enforce endpoint compliance, authentication policies, and zero-trust access frameworks. Key Responsibilities 1. NAC Operations & Administration Implement, configure, and maintain NAC solutions Manage authentication services including 802.1X, EAP protocols, RADIUS, and TACACS+. Monitor and optimize network access policies, segmentation rules, and device onboarding workflows. 2. Security & Compliance Enforcement Enforce endpoint security compliance (antivirus, posture checks, OS version, patch levels). Define and maintain zero-trust network access rules. Integrate NAC with SIEM, MDM, and identity management platforms. 3. Troubleshooting & Support Troubleshoot authentication failures, profiling issues, and device onboarding problems. Provide L2/L3 operational support for network access and security incidents. Collaborate with networking teams during escalations and root-cause analysis. 4. Network Integration Work with switching, wireless, firewall, and VPN teams to apply NAC policies across the environment. Configure switchport templates, VLAN assignments, CoA, and dynamic ACLs. Support BYOD onboarding portals and guest access provisioning. 5. Documentation & Governance Maintain documentation for NAC policies, network diagrams, SOPs, and deployment standards. Assist in audits, compliance checks, and risk assessments. Required Skills & Experience Hands-on experience with one or more NAC platforms: Cisco ISE Strong knowledge of: 802.1X, RADIUS, TACACS+ VLANs, DHCP, DNS Network protocols (TCP/IP, SNMP, LLDP/CDP) Endpoint posture assessment Experience integrating NAC with: Active Directory / Azure AD MDM (Intune, Workspace ONE) SIEM solutions Ability to analyze logs, packets, and authentication flows.
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Information at a Glance

Why HCLTech?

At HCLTech, you'll supercharge your potential. You'll find your career. And you'll find your spark. All at a place that knows that helping its customers stay on top starts by putting its people first.

HCLTech is a global technology company, home to more than 226,300 people across 60 countries, delivering industry-leading capabilities centered around digital, engineering, cloud and AI, powered by a broad portfolio of technology services and products. We work with clients across all major verticals, providing industry solutions for Financial Services, Manufacturing, Life Sciences and Healthcare, Technology and Services, Telecom and Media, Retail and CPG, and Public Services. Consolidated revenues as of 12 months ending December 2025 totaled $14.5 billion.
23 Benefits At HCLTech, we believe in empowering our employees with comprehensive benefits that support their professional growth and enhance their well-being. When you sign up for a career with us, you gain access to: https://rmkcdn.successfactors.com/147eb21f/a701dca9-f32d-4fc9-9447-6.svg Industry-benchmarked compensation https://rmkcdn.successfactors.com/147eb21f/b0c54381-ddcc-4a33-9b35-9.svg Best-in-class healthcare benefits https://rmkcdn.successfactors.com/147eb21f/b73027be-7aae-4d36-a090-4.svg Personal time off https://rmkcdn.successfactors.com/147eb21f/d5b4fdfd-2e99-4e26-9878-9.svg Maternity and paternity benefits https://rmkcdn.successfactors.com/147eb21f/3d42b0fc-4652-435a-9ece-c.svg Access to skills / higher education programs/resources https://rmkcdn.successfactors.com/147eb21f/aeddeaf2-9e25-4584-ad11-d.svg Discounts on products and services via Benefit Box https://rmkcdn.successfactors.com/147eb21f/a9609a3b-2700-4b3c-9d90-a.svg Participate in CSR programs and live life with a purpose https://rmkcdn.successfactors.com/147eb21f/c6e33851-710f-4634-bd69-f.svg Opportunities to grow and advance your career Note: The benefits listed above vary depending on the nature of your employment and the country where you work. Some benefits may be available in some countries but not in all.