Senior Systems Engineer

1 week ago

Washington, United States ManTech Full time

Currently, ManTech is seeking a motivated, career and customer-oriented Senior Systems Engineer to join our team supporting a large U. S. Government program within the National Capitol Region. Responsibilities include, but are not limited to: Submit change requests and troubleshoot as requested by components, the Security Operations Center (SOC), and others: forward proxy, reverse proxy, DNS, SSLV, and firewall requests to the Telecommunications provider for the WAN. Manage high-volume (more than 1M messages per day) SMTP relays. Manage the Proofpoint mail security system. Also diagnose mail delivery issues through several layers of security. Monitor and manage mail routing using an LDAP directory. Diagnose user connectivity issues using logs. Monitor and manage Infoblox DNS system as well as general BIND/DNS functionality. Configure and utilize the Xymon monitoring system to evaluate any potential issues and investigate any problems. Perform Dynatrace and SNMP-based monitoring. Maintain archival logging for network systems. Implement a Zscaler Zero Trust solution for TIC 3.0 deployment. Manage IP Address allocations with IPAM Administer and manage Unix/Linux operating systems. Manage and monitor Zscaler environment; Deploy and maintain Zscaler related physical and virtual machines to include but not limited to: ZPA connectors; LSS connectors; NSS systems; Private Service Edges (ZPA & ZIA) Basic Qualifications: A bachelor’s degree in computer science or management information systems or equivalent discipline A minimum of (7) seven years of IT experience and must have 4 years experience supporting networks and network security solutions and tools. Hands on experience using tools / technologies such as: Zscaler, Inflobox, Dynatrace, ProofPoint, Cisco, Xymon, MS IPAM and Unix/Linux. Direct experience configuring and troubleshooting forward and reverse proxies and network firewalls Experience with the design, installation, maintenance, and coordination of the use of aTIC Experience evaluating complex hardware and software and peripheral equipment for large, complex networks. Proven experience managing network performance. Experience troubleshooting and resolving complex problems to ensure quality transmission service on the network. Experience managing, maintaining, creating, and deleting user accounts as well as maintaining and updating system security plans on all platforms. Proven experience implementing and managing network policies, procedures, and standards. Security Clearance Requirements: Must be a U.S. citizen Must possess and maintain an active Top-Secret clearance Physical Requirements: Must be able to be in a stationary position more than 50% of the time Must be able to communicate, converse, and exchange information with peers and senior personnel Constantly operates a computer and other office productivity machinery, such as a computer The person in this position frequently communicates with co-workers, management, and customers, which may involve delivering presentations. Must be able to exchange accurate information in these situations The person in this position needs to occasionally move about inside the office to access file cabinets, office machinery, etc.

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