Network Systems Administrator

Network Systems Administrator Downey, CA 12 MonthsRequired Skills:Three (3) years of experience within the last four (4) years in the capacity of a Network Systems Administrator or similar role.Two (2) years of experience within the last four (4) years as a systems administrator or network engineer supporting a networked environment with at least 100 servers, 2,000 or more users and multiple firewalls, switches, and routers. The network environment must consist of multiple VLANs in a single location AND multiple physical locations connected through routers or similar layer-3 routing devices.Two (2) years of experience within the last four (4) years in a security monitoring role.Responsibilities:Support routine operational tasks associated with Enterprise Network, IBM Mainframe, Windows/Linux production systems and platforms including infrastructure monitoring systems, running and interpreting scripted reporting activities, maintaining infrastructure hosted workstation.Provide support of complex network, VOIP, and server operating system environments.Perform a wide range of network related duties, including the design, implementation, configurations and maintenance of complex networks (e.g., routers, switches, bridges, etc.) and/or dispatching and managing County or vendor repair services.Provide support of devices' and Image Operating System (IOS) software upgrade projects and Virtual Local Area Network (VLAN) switch port modification projects.Perform NMS Testing on WAN or LAN infrastructure upgrades.Participate in various testing, information gathering in support of fault isolation, monitoring, management, and troubleshooting; generate reports and metrics in support of existing incidents and forensic review.Assist in managing projects and special assignments of the section, as required, including operating system software, system utilities and tools.Serve as a Tier 2 support resource and escalate to the Principal level.Provide Tier I, II and III support/assistance to higher level staff concerning on-going projects and technical workloads.Responsible for centralized monitoring, complex troubleshooting and triaging of operational infrastructures, and maintaining of client's managed data center and LAN/WAN infrastructures using various management and monitoring tools to identify existing or potential network, server, and data center infrastructure anomalies.Analyze customer tickets for security and operational concerns; serves as an escalation (Tier 2) technical resources and takes necessary action to isolate and/or resolve operational events.Serve as the focal point of all activities related to detection and isolation of incidents and security intrusions, ensuring prompt response and corrective actions, notification and escalation.Provide network security monitoring and support to mitigate, isolate, and resolve security incidents by implementing network security solutions, including access lists and network intrusion and prevention systems.Maintain ISD managed Network Intrusion Detection System (NIDS/IPS).Configure network devices' blocking interfaces on NIDS/IPS to ensure our networks are well-protected.Review signatures and analyze virus intrusion reports and initiates corrective action as required.Actively monitors security threats and escalates as appropriate.Handle Port Opening Request implementation/troubleshooting.Work on ServiceNow Cherwell tickets by contacting the assigned and/or dispatched vendor resources for appropriate status updates and reconciliation.Maintain active monitoring environments and processes.Review existing customer tickets to determine ticket status and follows up as appropriate.Direct, coordinate and actively participate with County or vendor repair groups to ensure the completion of installations, reconfigurations, repairs, and processing of change orders as directed by customers, County Engineers, or Management.Communicate and work directly with customers, vendors, and Network Operations Center staff to identify problems, implement solutions, and obtains feedback on results.Process and validate Change tickets and vendor access forms.May serve as back-up to Principal Network System Administrator as appropriate.Review, process and approve vendor access requests forms.Generate required reports such as; Cisco Works Syslog reports, NetScout, Wireshark, PRTG, CACTI, Open Network Management System (ONMS) and other monitoring-tool reports and traces in support of existing incidents and forensic reviews.Generate and prioritize proactive tickets via ISD monitoring and management tools.Assist ISD technology resources toward development and maintenance of operational "Run Books" and tactical procedures.Document all technical work and update existing documentation as appropriate.Refine the security incident response processes supporting a countywide Cyber Governance Division by analyzing the current process to reduce the number of steps, handoffs, and inefficiencies in current county practices.Responsible for all aspects of user support, system configuration, system administration, customer interaction/notification, working with county vendors (i.e. Cisco, Microsoft, McAfee, etc.), work with internal and external customer departments, work with internal and external customer Department Information Security Officers (DISOs) and provide weekly incident ticket status to Cyber Governance and Operations management and Executive Management.Provide knowledge transfer to Enterprise Operations staff.Provide after-hours and weekend support on an as needed or regular basis.