Sr. Network Engineer

Versar Global Solutions, on behalf of the DHS Homeland Security Enterprise Network (HSEN) Engineering Support Services Contract, is seeking a Senior Network Engineer to support ongoing WAN engineering and operations, including on site data center activities at the DHS facility in Ashburn, VA.

The ideal candidate will be proficient across a broad range of network technologies including, but not limited to, Cisco routing and switching, F5 GTM/LTM, Palo Alto firewalls, Cisco SD WAN (Viptela), and Cisco ACI. Familiarity with Zscaler and Cloudflare is considered a plus.

This individual will support solution design and implementation activities, technology refresh efforts, cloud integrations and migrations, and Tier 3/4 incident management troubleshooting.

What You'll Do:

• Work with network architects, engineers, and DHS stakeholders to design, install, and configure network solutions to meet business and security requirements.
• Collaborate with DHS HQ, DHS Components, and application stakeholders to design, implement, and support network solutions aligned with enterprise standards.
• Develop and submit recommendations for new or updated configurations within the HSEN Architecture to incorporate emerging technologies, new releases, maintenance requirements, or evolving mission needs.
• Provide onsite data center support at the DHS Ashburn facility on an as needed basis, including cable management, racking equipment, and console access for troubleshooting.
• Architect, deploy, and manage Cisco ACI fabrics across data center, hybrid, and multi cloud environments-optimizing policies, contracts, and EPGs while leveraging APIs, automation, and orchestration tools for scalable and secure network operations.
• Develop WAN network solutions aligned with DHS architecture and design standards.
• Conduct "as is" analyses of existing network technologies and recommend changes to optimize performance and reliability.
• Produce systems engineering artifacts, including requirements documents, design packages, diagrams, and other project deliverables.
• Troubleshoot network incidents, provide root cause analysis, and document findings in ServiceNow and knowledge repositories such as SharePoint.
• Participate in after-hours work for network change implementations and participate in the on call rotation for escalations from the Network Operations Security Center (NOSC) during nights, weekends, and holidays.
• Establish effective working relationships with vendors to ensure alignment with current and future technical requirements.

• BA / BS (relevant field); relevant IT experience may be a substitute for education.
• 10+ years of demonstrated network engineering and architecture experience designing, configuring, monitoring, and troubleshooting complex enterprise networks.
• 5+ years of hands-on experience with Cisco routing, switching, and firewall platforms (e.g., ISR, ASR, CSR, ASA, Nexus, TACACS/ISE).
• Strong knowledge of routing protocols (e.g., BGP, EIGRP, OSPF) and network protocols (e.g., TCP/IP, GRE, IPsec, VRF).
• Solid understanding of MPLS, DMVPN, and SD WAN technologies.
• Proficiency with routing/switching, firewalls, load balancers, and proxy servers.
• High level architectural and operational experience supporting complex networks.
• Experience facilitating network requirements sessions.
• Experience with network monitoring and management tools.
• Ability to create and update network diagrams (Visio).
• Previous experience supporting federal networks is a plus.
• Experience producing design documentation, diagrams, and engineering artifacts.
• Must be resourceful and able to learn a large, complex, and evolving network.
• Must be proficient in English, both written and verbal, to ensure effective communication and collaboration.
• Successful results of pre-employment screenings, including federal background check, MVR, and drug screen.
• Comply with company drug and alcohol policy.
• Be authorized to work in the US or will be authorized by the successful candidate's start date., Cisco CCNA, Cisco CCNP

Palo Alto Networks Certified Network Security Engineer / Administrator, F5

Software/Hardware Desired

Experience with Microsoft Office Applications (e.g., Word, Excel, PowerPoint, MS Teams)

Experience with creating network diagrams in MS Visio

Expected Salary: $105,000 - $133,000 per year

Headquartered in Washington, DC, Versar Global Solutions provides full mission lifecycle solutions for challenges faced by our government and commercial Customers in the natural, built, and digital environments. With nearly 1,600 team members around the world, and a rich legacy spanning more than 50 years, Versar Global Solutions delivers a broad array of planning, analysis and risk management solutions, project and program management, operations and maintenance services, and information technology applications for environmental management and remediation projects, mission critical facilities and installations, and in support of readiness and contingency operations.