Senior Network Engineer

Agil3 Technology Solutions (A3T) is seeking an experienced Senior Network Engineer to provide enterprise network engineering, administration, sustainment, and Tier III technical support for the U.S. Government IT environment. The Senior Network Engineer will be responsible for designing, configuring, maintaining, monitoring, securing, documenting, and troubleshooting enterprise network infrastructure supporting customer operations. The position supports geographically dispersed locations and works closely with Systems Engineering, Systems Administration, Cloud Engineering, Cybersecurity, and Technical Support personnel. Key Responsibilities Engineer, configure, administer, maintain, monitor, and troubleshoot enterprise LAN, WAN, and wireless network infrastructureConfigure and maintain Cisco network equipment and associated network-management technologiesManage and troubleshoot switches, routers, wireless infrastructure, network interfaces, VLANs, IP addressing, and related network servicesSupport Internet Protocol Address Management (IPAM) and maintain accurate IP address and VLAN assignmentsConfigure and maintain network access and connectivity supporting users, servers, applications, cloud services, and enterprise systemsSupport and troubleshoot DISA and commercial telecommunications circuits, including coordination with external service providers when necessaryOpen, manage, track, and resolve technical support cases with Cisco TAC and other network-equipment vendorsDiagnose complex network outages, degraded performance, packet loss, connectivity failures, routing problems, wireless issues, and other infrastructure incidentsMonitor network availability, utilization, capacity, performance, and security and proactively identify potential service degradationPerform advanced root-cause analysis of network and infrastructure incidents and recommend corrective actionsInstall and implement network device software, firmware, patches, and security updates in accordance with applicable cybersecurity directivesSupport applicable IAVA/IAVB/IAVM, STIG, vulnerability-remediation, and cybersecurity-hardening activities affecting network infrastructureCoordinate with Cybersecurity personnel to remediate vulnerabilities and maintain secure network configurationsMaintain configuration baselines and participate in formal configuration- and change-management processesMaintain current network diagrams, architecture documentation, equipment configurations, circuit information, SOPs, troubleshooting procedures, and other technical documentationDevelop and maintain Standard Operating Procedures (SOPs) and After Action Reports (AARs) for significant outages, maintenance activities, upgrades, and network incidentsIdentify network equipment approaching End-of-Life (EOL) or End-of-Support (EOS) and provide recommendations for technology refresh and replacementSupport network equipment replacement and Return Material Authorization (RMA) activitiesSupport network modernization, upgrades, migrations, installations, and technology-refresh initiativesCoordinate with Cable/Infrastructure Technicians concerning premise wiring, patch panels, network closets, fiber/copper connections, and physical connectivity issuesWork with Systems Engineers and Systems Administrators to troubleshoot network-dependent services and application connectivityCoordinate with Cloud Engineers concerning connectivity between on-premises environments and Microsoft Azure/cloud resourcesProvide Tier III escalation support for complex network problems escalated by Systems Administrators and Technical Support personnelProvide technical guidance and mentoring to network, systems, and support personnel Minimum Experience: Must have 8+ years of progressively responsible network administration, network engineering, or enterprise infrastructure experienceMust have an active DoD Secret security clearanceMust have a Cisco Certified Network Professional (CCNP) certificationMust meet applicable DoD 8140/DCWF requirements for Work Role 441 at the Advanced proficiency levelDemonstrated experience supporting complex enterprise LAN/WAN environmentsAdvanced experience configuring and troubleshooting Cisco routing and switching technologiesExperience supporting enterprise wireless network infrastructureStrong understanding of TCP/IP, routing, switching, VLANs, subnetting, DNS, DHCP, SNMP, VPNs, and network-access technologiesExperience with network monitoring, performance analysis, fault isolation, and capacity managementExperience troubleshooting DISA, telecommunications-provider, WAN, or comparable enterprise circuit connectivityExperience performing network-device patching, firmware/software upgrades, and configuration changesExperience implementing and maintaining secure network configurationsKnowledge of DoD cybersecurity requirements applicable to network devices and infrastructureExperience with enterprise network-management and monitoring technologiesExperience maintaining network architecture diagrams, configurations, SOPs, circuit documentation, and technical proceduresExperience working within formal configuration-management and change-management processesDemonstrated ability to perform advanced network troubleshooting and root-cause analysisAbility to independently resolve complex technical issues and coordinate resolution across multiple engineering disciplinesStrong written and verbal communication skillsAbility to support geographically dispersed users and infrastructure Preferred Qualifications: Bachelor's degree in Information Technology, Computer Science, Network Engineering, Cybersecurity, Engineering, or related technical disciplineCompTIA Security+, CySA+, SecurityX/CASP+, CISSP, or other certificationExperience with Cisco Catalyst switches, routers, wireless controllers, and enterprise wireless access pointsExperience with Cisco Identity Services Engine (ISE) or comparable network-access-control technologyExperience with enterprise firewalls and security appliancesFamiliarity with DISA STIGs, ACAS/Tenable findings, IAVA requirements, and DoD vulnerability-management processesExperience with SolarWinds or comparable network-monitoring/management platformsExperience supporting fiber and copper network infrastructureExperience with Microsoft Azure networking or hybrid cloud connectivityFamiliarity with VPN, ExpressRoute, cloud routing, network security groups, and hybrid enterprise connectivityExperience with ServiceNow or another enterprise ITSM/ticketing platformITIL Foundation certification or experience working within an ITIL-based service-delivery environmentPrevious USMC, Navy, DISA, or other DoD enterprise networking experience Compensation A3T is committed to offering competitive compensation based on individual qualifications and business needs. The salary range posted for this position represents a reasonable estimate of the expected pay range; however, actual compensation may vary depending on factors such as geographic location, education, certifications, technical skills, relevant experience, knowledge, and overall qualifications. The posted range is intended to reflect the typical salary range for this role within A3T. Target Salary for this Role: $115,000 - $140,000 Company Overview Agil3 Technology Solutions LLC ("A3T") is a Northern Virginia based, ISO 9001, ISO 20000-1 & ISO 27001 Certified, Women-Owned (WOSB) and Service-disabled Veteran-Owned (SDVOSB) small business. A recent recipient of the prestigious Washington Technology TOP 50 (ranking #9, and on the list for last 4 years!), A3T is experiencing industry leading recognition and growth. In addition to the CEO’s recognition as an “All-Star Entrepreneur”, A3T is recognized by Inc Magazine as one of the fastest growing companies in the country, by Vet 50 as Fastest Growing Veteran-Owned Businesses, and is featured in CyberSecurity Ventures / Cybercrime Magazine! “As a go-to Women-Owned Cybersecurity company in US and internationally”. As part of our growth, we are looking for YOU to join our growing team. A3T offers excellent benefits to enhance the work-life balance, including: Medical InsuranceDental InsuranceVision InsuranceLife InsuranceShort Term & Long-Term Disability401k Retirement Savings Plan with Company MatchPaid HolidaysPaid Time Off (PTO)Tuition and Professional Development AssistanceParking/Travel Reimbursement (metropolitan areas) Powered by JazzHR 8OZMYFTFyZ