Sr. Network Administrator

Sr. Network AdministratorOur work depends on a Network Administrator Senior joining our team to maintain and enhance secure, reliable, and high-performance network services that enable the customer's critical mission operations.Job responsibilities include:Working closely with senior network engineers, system administrators, and security teams to troubleshoot issues, resolve incidents, and implement network changes in a collaborative team environment.Participating in network design discussions and deployments, supporting equipment setup, cabling, fiber work, and physical infrastructure buildouts while adhering to established standards and best practices.Supporting Cisco ISE and DNA Center (DNA-C) to manage network access control, policy-based automation, and assurance in a fast-paced environment.Implementing and managing VLANs, routing policies, access control rules, and network segmentation to support secure, scalable, and logically separated environments.Assisting in maintaining secure network environments by enforcing firewall rules, VPN configurations, network access control policies, and security best practices in support of compliance and cyber defense objectives.Utilizing full scope of technical and interpersonal skills to further the mission.Required education:High School diplomaRequired experience:3+ years of experienceRequired technical skills:Experience configuring and supporting network switches and routersStrong understanding of TCP/IP, DNS, DHCP, STP, SNMP, and routing fundamentalsHands-on experience with Cisco ISE and DNA Center (DNA-C)Knowledge of firewalls, ACLs, NAT, and VPN technologiesProficiency with VLANs, trunking, inter-VLAN routing, and segmentationExperience with packet capture and analysis tools (e.g., Wireshark, NetFlow)Familiarity with enterprise wireless technologies and basic RF troubleshootingUnderstanding of network access control systems (RADIUS, TACACS+, 802.1X)Working knowledge of cabling standards, fiber infrastructures, and physical network componentsRequired certifications:CompTIA Security+Cisco Certified Network Associate (CCNA)Security clearance level:TS/SCI (must be able to maintain or obtain)Required skills and abilities:Strong troubleshooting and analytical skills with a methodical approach to problem solvingEffective verbal and written communication skills to collaborate with technical and non-technical stakeholdersAbility to follow standard operating procedures, change management processes, and security/compliance requirementsStrong attention to detail and ability to maintain accurate documentationAbility to work both independently and as part of a team in a fast-paced, mission-focused environmentPreferred skills:Experience with cloud networking concepts (Azure or AWS)Exposure to SD-WAN technologiesFamiliarity with VoIP and QoS principlesExperience with network automation tools or scripting (e.g., Python, PowerShell, Ansible)Location:On Customer Site