Lead Network Security Engineer
About The Position
The Lead Network Security Engineer implements and supports enterprise-scale Cisco Identity Services Engine (ISE) solutions and related network access control technologies. The role enhances secure access controls, authentication services, device visibility, and network segmentation across wired, wireless, VPN, and cloud-connected environments. It serves as a technical subject matter expert for Cisco ISE, authentication infrastructure, and Zero Trust initiatives, while mentoring less experienced engineers and supporting daily operations and strategic cybersecurity projects. The position designs and implements large-scale security systems and solutions, solves advanced and complex problems, and acts as a knowledge resource for less experienced engineers. It primarily supports Identity & Access Engineering and Security & Network Infrastructure functions, including enterprise authentication and authorization, identity-driven access controls, least-privilege policies, secure network access architecture, segmentation, device visibility, and posture validation. The role works with Cybersecurity, Network Engineering, Enterprise Infrastructure, Identity Management, and Technology teams, and exercises judgment in selecting methods and techniques with limited supervision. The role is four days onsite at the Wilmington, Delaware location, with the flexibility to work from home one day per week.
Requirements
- Bachelor's degree and a minimum of 5 years of relevant work experience, or, in lieu of a degree, a combined minimum of 9 years of higher education and/or work experience.
- Advanced proficiency in cybersecurity and network infrastructure technologies.
- Ability to exercise judgment in selecting methods, techniques, and criteria to achieve objectives with limited supervision.
- Serve as a subject matter expert for Cisco ISE, AAA services, NAC technologies, and identity-based network security.
Nice To Haves
- Advanced understanding of security system development and infrastructure lifecycle and architecture, and systems design.
- Proven experience developing and customizing tools used in an assigned Cybersecurity function.
- Demonstrated ability to translate architecture into technical requirements.
- Proficient critical-thinking and problem-solving ability.
- Excellent communication and interpersonal skills.
- Experience partnering with leaders to design solutions to business needs.
- Persuasive communication skills to gain buy-in from others.
- Ability to analyze and draw reliable conclusions from large volumes of quantitative data from diverse sources.
- Ability to serve effectively in an indirect leadership role.
Responsibilities
- Implement Cisco ISE-based Network Access Control (NAC) solutions supporting enterprise-wide authentication, authorization, and accounting (AAA) services.
- Configure and maintain Cisco ISE policies, including 802.1X authentication, RADIUS, TACACS+, device profiling, posture assessment, guest access, and BYOD onboarding.
- Assist in developing and maintaining role-based access controls, dynamic authorization policies, and network segmentation strategies using technologies such as Cisco TrustSec and Security Group Tags (SGTs).
- Support testing and validation for Cisco ISE deployments, upgrades, patches, integrations, and policy changes across wired, wireless, and VPN environments.
- Manage deployment and lifecycle management of Cisco ISE infrastructure, including distributed nodes, high-availability configurations, certificates, and identity source integrations.
- Maintain Cisco ISE integrations with Active Directory, LDAP, PKI, certificate services, endpoint management platforms, SIEM solutions, and security orchestration tools.
- Develop automation and orchestration capabilities for user provisioning, policy management, endpoint onboarding, compliance validation, and operational support.
- Analyze authentication, authorization, and network access events to identify security risks, optimize policies, and improve user experience.
- Troubleshoot complex authentication, authorization, certificate, device posture, and network access issues across enterprise environments.
- Partner with Network Engineering, Cybersecurity, Infrastructure, and Identity teams to implement secure access solutions aligned with Zero Trust principles.
- Serve as a technical liaison with Cisco and other vendors to resolve advanced support issues, evaluate product enhancements, and optimize solution performance.
- Assist leadership with product lifecycle management, including licensing, hardware refresh planning, software upgrades, certificate management, and technology roadmap development.
- Develop standards, procedures, and best practices for identity-driven network access control and secure network segmentation.
- Mentor junior engineers and operations teams and serve as a technical knowledge resource.
- Understand and adhere to company risk and regulatory standards, policies, and controls; design, implement, maintain, and enhance internal controls; and escalate risk-related issues to management.
- Promote an environment that supports belonging and reflects the company's values.
- Maintain internal control standards, including timely implementation of audit findings and remediation activities.
- Complete other related duties as assigned.
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What This Job Offers
Job Type
Full-time
Career Level
Senior
