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 www.dminc.com

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

• Minimum Salary Rate $97,273.50 Median Salary Rate $102,377.50 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.

• ***************** No Agencies Please *****************

• Applicants selected may be subject to a government security investigation and must meet eligibility requirements for access to classified information. US citizenship may be required for some positions.