Network Security Engineer
Network Security Engineer - Senior Cisco Identity Services Engine (ISE) Engineer
Location: Washington, DC (Onsite)
Type:
Full-Time Required Experience10–15 years of Network/Security Engineering experience. Strong hands-on experience with Cisco ISE 3.x in large enterprise environments. Experience with Cisco ISE upgrades, patching, troubleshooting, administration, and multi-node deployments. Strong knowledge of 802.1X, RADIUS, EAP/EAP-TLS, NAC, AAA, Authentication & Authorization Policies. Experience with Active Directory integration, Security Groups, and Identity Sources. Strong understanding of PKI and Certificate Management, including server certificates, CA chains, certificate renewals, thumbprints, and certificate-based authentication. Experience with Cisco ISE vulnerability remediation, security patching, and production support. Hands-on experience with packet captures, ISE logs, authentication troubleshooting, and root cause analysis. Experience integrating Cisco ISE with:
Cisco Catalyst:
- MerakiFirewallsF5DNSSplunk/SIEM platforms ServiceNow & Change Management
- Experience creating and managing ServiceNow Change Requests.
- Ability to write implementation, validation, rollback, and risk assessment plans.
- Experience executing:
- ISE upgrades and patching
- Certificate renewalsDNS changes
- Policy updates
- Security group changes
- New integrations
- Infrastructure migrations Incident & Support Experience
- Strong troubleshooting experience across: Endpoint → Switch/AP → ISE → Active Directory → Authorization Policy → Network Access
- Experience with major incidents, RCA, and Cisco TAC case management.
- Ability to diagnose authentication, authorization, certificate, and connectivity issues. Infrastructure & Automation
- Experience with:
- Cisco ISE migrations and node deployments
- High Availability (HA) environments
- Splunk monitoring and alerting
- ServiceNow integrations
- Preferred experience with:
Python
AnsibleTerraformREST APIsCI/CD Automation Preferred QualificationsCCNP Enterprise / CCNP Security or equivalent.
Experience with Cisco Catalyst, Meraki, Enterprise Wireless, Active Directory, PKI, Splunk, and ServiceNow.
Experience in highly regulated enterprise environments.