Senior Network Engineer

About DMI DMI is a leading provider of digital services and technology solutions, headquartered in Tysons Corner, VA. With a focus on end-to-end managed IT services, including managed mobility, cloud, cybersecurity, network operations, and application development, DMI supports public sector agencies and commercial enterprises around the globe. Recognized as a Top Workplace, DMI is committed to delivering secure, efficient, and cost-effective solutions that drive measurable results. Learn more at About the Opportunity 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. Duties and 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 Qualifications Education and Years of Experience: 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 Required Skills & Certifications: 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 Background Requirements: 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. Citizenship Status Required: Must be a U.S. Citizen Physical Requirements: None required for this position. Location: Remote, US Working at DMI DMI is a diverse, prosperous, and rewarding place to work. Our culture is shaped by five core values that guide how we work, grow, and succeed together: Do What’s Right – We lead with honesty and integrity. Own the Outcome – We take responsibility and deliver. Deliver for Our Customers – We are relentless about delivering value. Think Bold, Act Smart – We innovate with purpose. Win Together – We collaborate and celebrate our success. These values aren’t just ideals—they show up in how we support every part of your well-being: Convenience/Concierge – Virtual health visits, commuter perks, pet insurance, and entertainment discounts that make life easier. Development – Annual performance reviews, tuition assistance, and internal career growth opportunities to help you thrive. Financial – Generous 401(k) matches, life and disability insurance, and financial wellness tools to support your future. Recognition – Annual awards, service anniversaries, referral bonuses, and peer-to-peer shoutouts that spotlight your achievements. Wellness – Healthcare coverage, wellness programs, flu shots, and biometric screenings to support your health. DMI values employees for their talents and contributions, and we take pride in helping our customers achieve their goals. Because when we live our values, we all win together. #J-18808-Ljbffr