Senior Network Engineer

Benefits U.S.-based employees have access to medical, dental, and vision insurance, a 401(k) plan and company contribution, short-term and long-term disability coverage, basic life insurance, and wellbeing benefits, among others. U.S.-based employees also receive, per calendar year, up to 6 scheduled paid holidays. Additionally, eligible hourly/non-exempt and exempt employees accrue up to 112 hours of PTO based on years of service and may annually take up to 8 hours of paid volunteer time. Additional paid sick leave is also provided if required by state or local law. Summary of Position:The Senior Network Engineer is responsible for the architecture, design, engineering, and operational support of Denali's enterprise network, which is primarily Cisco-based with Ubiquiti UniFi deployments at select remote sites. This role provides expert-level routing, switching, wireless, and network security support (including Cisco ISE, Cisco Umbrella, and Cisco Firepower Threat Defense), and also maintains and supports network infrastructure associated with customer equipment that Denali hosts on-premise on behalf of its customers. The Senior Network Engineer participates in planning, installation, maintenance, management, and coordination of all network services, and serves as a senior technical escalation point for complex network issues, including Wi-Fi troubleshooting and remediation.Essential Functions:Provide expert-level network design and daily operational support for Denali's enterprise-wide Cisco network infrastructure, including sites with Ubiquiti UniFi equipmentLead architecture and design of routing, switching, wireless, and network security solutions to meet business and operational requirementsServe as a senior escalation point for complex network incidents; perform root cause analysis on service-interrupting events and implement measures to prevent recurrenceDesign, configure, deploy, and maintain Cisco ISE for network access control, authentication, and policy enforcementAdminister and optimize Cisco Umbrella for DNS-layer security and web filtering across the environmentAdminister and support Cisco Firepower Threat Defense (FTD) for network security, threat prevention, and firewall policy managementTroubleshoot and remediate wireless (Wi-Fi) connectivity, coverage, and performance issues across corporate and remote sitesImplement and maintain routers, switches, firewalls, and wireless infrastructure across LAN, WAN, and remote-site environmentsSupport and maintain network infrastructure associated with customer equipment hosted on-premise at Denali facilities, ensuring segmentation, availability, and security standards are metDesign, configure, monitor, and optimize local and wide area networks for maximum availability, performance, and securityDesign, configure, and manage network security features, including firewalls, VPNs, and access control, in coordination with the security teamDevelop, maintain, and update a library of network technical documentation, including topology diagrams and standard operating proceduresEvaluate and recommend new network hardware, software, and technologies for compatibility, scalability, and securityPartner with cross-functional IT and engineering teams to plan, install, and coordinate network changes, upgrades, and new deploymentsMentor and provide technical guidance to junior network engineers and IT staffParticipate in an on-call rotation and provide after-hours support for critical network issues as neededKeep current on emerging network technologies, security threats, and industry best practicesCompetencies:Ensures AccountabilityTech SavvyCommunicates EffectivelyValues DifferencesCustomer FocusResourcefulnessDrives ResultsPlans and PrioritizesDecision QualitySelf-DevelopmentWork Environment:This position is based in a professional office setting and regularly utilizes workplace technology, including computers, smartphones, multifunction printers, cloud-based filing systems, and collaboration tools.Physical Demands:This role requires physical capabilities that support the successful execution of key responsibilities. The employee regularly engages in verbal and written communication with colleagues and clients to address project-related inquiries and must be able to convey accurate information clearly and efficiently. The position involves remaining seated at a workstation for approximately 75% of the time, with occasional movement throughout the office to access equipment, supplies, and shared resources. Daily tasks include consistent use of computers and standard office technology such as keyboards, printers, and multifunction devices. The role also involves transporting equipment boxes weighing up to 25 pounds within the building and to other offsite locations as needed for project support.Required Education : Bachelor's degree in Computer Science, Information Technology, or a related field preferred (or equivalent combination of education and experience) 5+ years of experienceQualifications:5+ years of experience as a Network Engineer, with demonstrated experience at a Senior levelExpert-level knowledge of enterprise network architecture and designExpert-level experience with Cisco routing and switching in a production enterprise environmentExpert-level experience deploying, configuring, and supporting Cisco ISE (Identity Services Engine)Expert-level experience administering Cisco UmbrellaExpert-level experience administering and supporting Cisco Firepower Threat Defense (FTD)Required: proven, hands-on experience troubleshooting and remediating Wi-Fi/wireless issuesExperience with Ubiquiti UniFi equipment, particularly in a remote-site context, strongly preferredExperience supporting wireless LAN controllers (Cisco WLC C9800), SD-WAN via Cisco vManage Dashboard, and centralized security management platforms (Cisco FMC or FDM)Experience supporting network infrastructure for customer-owned equipment hosted on-premiseStrong working knowledge of network security fundamentals, including firewalls, VPNs, and segmentationStrong documentation, troubleshooting, and root cause analysis skillsAbility to prioritize competing critical tasks and work independently with minimal directionStrong written and verbal communication skills, with the ability to explain technical concepts to non-technical stakeholdersProfessional certification: CCNP or CCIE, or a similar certification level from another vendorOne or more of the following certifications preferred: CCIE Security, CCIE Enterprise Infrastructure, CCIE Data Center, or CCNP Data CenterAAP/EEO Statement:3MD Inc. is an equal opportunity employer and does not discriminate based on gender, sex, age, race and color, religion, marital status, national origin, disability, sexual orientation, gender identity or expression, veteran status, or any other category that is protected by applicable law.Other Duties:Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties, or responsibilities that are required of the employee for this job. Duties, responsibilities, and activities may change at any time with or without notice.