Senior Network Engineer, I

Walker & Dunlop is one of the largest providers of capital to the commercial real estate industry, committed to creating meaningful change in communities. The Senior Network Engineer, I is responsible for the analysis, installation, configuration, maintenance, security, and support of the enterprise-wide LAN, WAN, wireless, and network security infrastructure, ensuring network availability and performance align with business requirements.

Responsibilities:

• Provide Tier I–III support for LAN/WAN-related issues
• Configure, administer, and maintain Cisco networking technologies, including routers and switches supporting critical business applications
• Configure and manage firewall policies and threat protection using Cisco Firepower Threat Defense (FTD) and Firepower Management Center (FMC)
• Design, implement, and maintain secure network access using Cisco Identity Services Engine (ISE)
• Deploy and support zero-trust network access solutions using Cisco Secure Access
• Manage and execute network-related projects, ensuring alignment with industry best practices and standards for scalability, security, and performance
• Lead troubleshooting efforts, including diagnosis, resolution, escalation, and implementation of workaround solutions
• Provide advanced technical support and mentorship to peers and internal teams
• Participate in an on-call rotation to support operational and project-related needs
• Track, analyze, and remediate vulnerabilities identified by the Information Security team
• Perform other duties as assigned

Requirements:

• Bachelor's degree in Information Technology, Computer Science, or a related field, or equivalent professional experience
• 7+ years of experience as a Network Engineer in a mid- to large-scale enterprise environment
• Active CCNA certification or equivalent technical experience preferred
• Experience working with Cisco networking technologies, including routing, switching (Catalyst), and ISR/ASR routers
• Experience supporting network security technologies, including Cisco Identity Services Engine (ISE), Cisco Firepower Threat Defense (FTD/FMC), and zero-trust access solutions (Cisco Secure Access)
• Experience implementing network security controls such as 802.1X authentication, network segmentation, and network access control (NAC)
• Experience troubleshooting and supporting complex enterprise network environments
• Strong knowledge of enterprise Cisco network architecture across LAN and WAN environments
• Knowledge of firewall technologies, including Cisco FTD and Cisco ASA
• Understanding of zero-trust network access concepts and security best practices
• Knowledge of Cisco Enterprise Wireless, Cisco Meraki, or other enterprise wireless solutions
• Ability to design scalable, secure, and highly available network solutions
• Strong problem-solving and analytical skills with the ability to diagnose complex technical issues
• Effective verbal and written communication skills, including technical documentation and diagramming
• Customer-focused mindset with a commitment to quality and continuous improvement
• Ability to work independently and collaboratively in a fast-paced environment
• Willingness to participate in an on-call rotation and travel domestically up to 25% as needed
• Ability to show ownership of your work, take on challenges and acknowledge growth opportunities, and demonstrate patience when learning new processes
• Courtesy, respect, and thoughtfulness in teaming with colleagues and other stakeholders