Network Security 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, LLC is seeking a Network Security Engineer to join us. 

Duties and Responsibilities:

The Network Security Engineer role requires extensive Palo Alto Panorama, Firewalls, and Global Protect experience, along with extensive networking experience. Palo Alto Prisma Access and Zero Trust Network Access knowledge and experience are highly desired. A Network Security Engineer is responsible for providing architectural, technical, and problem resolution support for a Federal Agency network and security infrastructure that promotes a secure and scalable environment that aligns with the security requirements of our customer. 

A Network Security Engineer also focuses on both the short-term and the long-term strategy, recommends technology solutions and improvements to the network and security-related environments and is also responsible for delivering clear, concise, timely communications that promote confidence in our team’s ability to deliver operational excellence. They also perform Tier III “Build and Run” activities across multiple network and security environments, and review and recommend configuration changes, as needed.

The day-to-day responsibilities include the design, implementation, operations, troubleshooting, and resolution activities across multiple domains. They may be required to participate in system upgrades, deployments, and enhancements while focusing on delivery objectives, critical issues, and policy adherence. All Network Security Team members periodically work after hours to support system outages and critical infrastructure upgrades. This position may also require an on-site presence one or more days per week.

Qualifications

Education:                        

• BS Degree in Computer Science or Engineering, or equivalent work experience (required)

Experience:                       

• 10+ years of relevant technical Network/Security Engineering experience (required)
• Certifications: Desire three or more of the following: CCNP, CCDP, CCSP, CISSP, OSCP, PCNSE, PCNSA, ITIL

Required Skills:

• Extensive experience with Palo Alto Firewalls (ex: 3200 and 5200/5400/5600 series)
• Extensive experience with Palo Alto Panorama 9.x and above
• Extensive experience with Palo Alto Global Protect
• Extensive experience with Palo Alto Firewall Threat Protection, URL filtering, and other similar security features
• Extensive experience with decryption/TLS/Security Profiles/PKI and deep understanding of PCAPS
• Extensive experience with application-based traffic and designing solutions for Firewalling (Internal/Perimeter/External)
• Experience with Palo Alto Prisma Access-based Infrastructure, supporting multiple Data Centers and numerous offices

Desired Skills and Abilities:            

• Vendor hardware and software support, such as Cisco, Juniper, Palo Alto, and others
• Data Center, WAN, LAN, WLAN, Firewall, and Load Balancer systems and support
• Analysis and forensic tools, along with effective troubleshooting of ingress/egress and zoned traffic
• Azure Infrastructure and understanding Azure VNETs, Routing, and Firewalling
• Microsoft Entra ID and SAML authentication
• Laptop setup and configurations
• Implementing ZTNA with an understanding of all integration points of the ZT pillars, such as endpoint, identity, and workloads
• Developing ZT security policies that incorporate telemetry from identity systems, endpoints, and external management systems
• Whitelisting IP space for various project teams to access external vendors and to ensure safe and secure connectivity
• Creating Zones and Policies for various network segments and troubleshooting connectivity across Security Zones
• Work with internal applications teams, design, and implement an appropriate ZTNA program with PA Prisma Access
• Develop documents that describe design, security controls, and operational manuals
• Develop and participate in internal and external testing of applicable applications to ensure that sufficient security is in place ​
• Effective time management and organizational skills, and ability to translate technical issues for business users
• Work independently as well as in a team environment with effective interpersonal communication skills
• Analytical, communication, and problem-solving skills
• Support InfoSec Standards and Best Practices
• Thrives in a fast-paced environment and looks for ways to do things more effectively (Current Mode/Future Mode)

Additional Requirements: Successful completion of a Public Trust background investigation and/or a Public Trust clearance.

Min Citizenship Status Required: Must be a U.S. Citizen

Physical Requirements: No physical requirements are needed for this position.

Location: Arlington, VA / Dallas, TX

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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.