Senior Network Security Engineer - Zero Trust & Cisco

RPMGlobal; Washington (District of Columbia); On-site; USD 101,000 - 151,000; Full time

Benefits offered by this job

Health, life, disability, and 401(k)

Paid time off

Tuition assistance

Job summary

The MIL Corporation seeks a Senior Network Security Engineer to design, implement, and secure a large Cisco-based enterprise network. You will lead network engineering, security architecture, vulnerability remediation, and incident response across core, distribution, access, and perimeter environments.

This role emphasizes Zero Trust Architecture, NIST 800-53 compliance, and secure network hardening. On-site schedule applies; funding-dependent for future contract award.

Qualifications

• Minimum 8 years of experience supporting enterprise network environments.
• Minimum 5 years of hands-on Cisco networking experience.
• Experience with Cisco routing and switching, network segmentation, VLANs, DNS, DHCP, VPN technologies.
• Experience with 802.1X Network Access Control, firewall administration, and network security.
• Experience with network monitoring and logging solutions.
• Experience with vulnerability management and incident response.
• Experience implementing NIST 800-53 security controls.
• Experience supporting or implementing Zero Trust Architecture initiatives.

Responsibilities

• Design, implement, and maintain enterprise network infrastructure including core, distribution, access, and edge network environments.
• Configure, manage, and troubleshoot Cisco routing and switching technologies.
• Administer VLANs, DNS, DHCP, VPNs, and network access controls.
• Perform root cause analysis and corrective actions for outages, performance issues, and security incidents.
• Develop and maintain network architecture documentation, diagrams, and configuration standards.
• Implement and maintain network security controls aligned with Zero Trust Architecture principles.
• Design and maintain network segmentation and micro-segmentation strategies.
• Manage and support 802.1X network access control solutions.
• Harden network devices following Cisco guides and industry best practices.
• Secure perimeter environments through firewall policy management and MFA controls.
• Monitor network infrastructure and security events; integrate with SIEM.

Skills

Cisco routing and switching

Network segmentation

VLANs DNS DHCP VPN

802.1X NAC

Firewall administration

Network monitoring

Vulnerability remediation

Incident response

NIST 800-53

Zero Trust Architecture

Education

Bachelor's degree in IT/CS/Engineering

Tools

Cisco Identity Services Engine (ISE)

SIEM platforms

Job description

The MIL Corporation seeks a Senior Network Security Engineer to design, implement, and secure a large Cisco-based enterprise network. You will lead network engineering, security architecture, vulnerability remediation, and incident response across core, distribution, access, and perimeter environments.

This role emphasizes Zero Trust Architecture, NIST 800-53 compliance, and secure network hardening. On-site schedule applies; funding-dependent for future contract award.