Senior Network Security Engineer

Job Title:
Senior Network Security Engineer – Cisco ISE & Enterprise Infrastructure

We are looking for a Senior Network Security Engineer with deep expertise in Cisco Identity Services Engine (ISE) and enterprise network security technologies. This role is responsible for designing, deploying, and maintaining secure, scalable network solutions across enterprise campuses, branch offices, and data center environments. The ideal candidate will have strong hands‑on experience with Cisco networking, enterprise authentication, firewall technologies, SD‑WAN, and network security best practices.

This position requires someone who enjoys solving complex infrastructure challenges, driving security initiatives, and collaborating with cross‑functional teams to improve the organization's network architecture.

• Design, implement, and maintain Cisco ISE solutions to provide secure network access across wired and wireless environments
• Configure and support authentication, authorization, and accounting (AAA) services using RADIUS and TACACS+
• Implement network access control policies including 802.1X authentication, endpoint profiling, posture validation, BYOD, and guest access
• Build and maintain Cisco Nexus and Catalyst switching environments supporting enterprise data center and campus networks
• Configure and troubleshoot enterprise routing protocols including OSPF and BGP
• Manage VMware Velo Cloud SD‑WAN infrastructure and optimize WAN connectivity across distributed locations
• Support Palo Alto Networks firewalls, including policy creation, VPN configuration, NAT, Global Protect, high availability, and threat prevention features
• Assist with Fortinet Forti Gate and Cisco ASA administration where required
• Integrate Cisco ISE with Active Directory, PKI, certificate services, MFA solutions, and endpoint security platforms
• Monitor network performance, investigate outages, perform root cause analysis, and implement preventive improvements
• Develop technical standards, implementation guides, network diagrams, and operational documentation
• Work closely with security, cloud, systems, and application teams to ensure secure and reliable infrastructure
• Mentor junior engineers and provide technical guidance during network and security projects

• Bachelor's degree in Computer Science, Information Technology, Engineering, or equivalent practical experience
• Minimum of 8 years supporting enterprise network infrastructure
• At least 5 years of hands‑on Cisco ISE deployment and administration experience
• Strong background supporting large‑scale campus, branch, and data center environments
• Experience implementing enterprise network security solutions in highly available environments

• Cisco Identity Services Engine (ISE
• STACACS
• +Trust Se
• cSecurity Group Tags (SGT
• )Network Access Control (NAC
• )Guest & BYOD Service
• tVLAN
• svP
• CEther Channe
• lST
• PHSR
• POSP
• FBG

• Fortinet Forti Gat
• NSSL VP
• NGlobal Protec
• tNA
• THigh Availability (HA

• gVMware Velo Cloud SD-WA
• sWireshar
• kSplun
• kService No

• )Pytho
• nAnsibl
• eNetwork automation and scriptin

• CCNP Enterpris
• eCCNP Securit
• yCisco Certified Specialist – Security Identity Management (SISAS
• )PCNS
• EFortinet NS
• eCCIE Securit
• yCISS

• Strong analytical and troubleshooting skills
• Ability to work independently while managing multiple priorities
• Excellent written and verbal communication skills
• Experience mentoring engineers and leading technical initiatives
• Commitment to operational excellence, security best practices, and continuous improvement