Senior Network Engineer

DMI•Remote,

4d•Remote

About The Position

DMI is seeking a Senior Network Engineer to serve as the senior technical authority for secure network architecture and operations at a federal agency client. In this role, you will design, implement, and continuously improve a Cisco-based enterprise network in alignment with Zero Trust principles, NIST cybersecurity standards, and federal compliance requirements — providing technical leadership across engineering, security, and operations teams.

Requirements

Bachelor's degree in Computer Science, Information Technology, or a related field; relevant experience and Cisco certifications may be considered in lieu of a degree.
Professional certifications in network engineering or cybersecurity, maintained continuously for a minimum of 5 years
Experience designing and implementing NIST SP 800-53 and NIST SP 800-207 Zero Trust network architectures in enterprise environments
Expert-level proficiency with Cisco routing, switching, and firewall platforms; advanced experience with VLANs, DNS, DHCP, and VPNs
Experience in engineering and managing 802.1X network access control and identity-aware network security
Experience configuring centralized logging and integrating with enterprise SIEM and NDR platforms
Experience leading or participating in security assessments, audits, and compliance reviews
Cisco CCNP or CCIE (or equivalent) certification
7+ years of enterprise network engineering experience, including at least 3 years in a senior or lead engineering role
Experience integrating SIEM and NDR platforms for real-time threat detection and alerting
Experience supporting or leading incident response operations
Prior experience in a federal government network engineering environment
Must possess or be eligible to obtain and complete a Public Trust background investigation and/or a Public Trust clearance.
Public Trust Tier 2 clearance required.
Must be a U.S. Citizen

Responsibilities

Design, implement, operate, and optimize Cisco-based network infrastructure, including core, distribution, access, and edge layers for high availability, scalability, and mission resilience
Implement and maintain network security architecture aligned with NIST SP 800-53, NIST SP 800-207 Zero Trust Architecture, and Cisco security best practices
Engineer and enforce Zero Trust network principles, including network segmentation, micro-segmentation, and continuous verification of users and devices
Design and implement least-privilege network access controls with role-based and identity-aware access mechanisms, including 802.1X
Configure and maintain centralized logging, SIEM integration, and NDR tool connectivity to enhance threat detection and incident response readiness
Conduct continuous monitoring and vulnerability assessments; coordinate remediation in alignment with NIST RMF
Secure perimeter and public-facing assets through ingress/egress filtering, firewall rule optimization, and MFA for administrative access
Lead security assessments, audits, and compliance reviews; continuously evaluate and enhance network security posture through emerging best practices
Serve as senior technical advisor to stakeholders; collaborate with cybersecurity, cloud, and operations teams to resolve complex issues and improve architecture
Support incident response with network-level analysis, containment actions, and forensic data collection