Senior Systems Administrator
4 days ago
Overview: ManTech is seeking a highly skilled Senior Systems Administrator to support a large U.S. Government program in the National Capitol Region. As a key member of our team, you will play a critical role in managing network infrastructure and ensuring the security and integrity of our systems.
Salary: $100,000 - $160,000 per year
Responsibilities:
• Manage high-volume SMTP relays and troubleshoot mail delivery issues through multiple layers of security.
• Monitor and manage mail routing using an LDAP directory and troubleshoot user connectivity issues using logs.
• Configure and utilize the Xymon monitoring system to identify potential issues and investigate problems.
• Perform Dynatrace and SNMP-based monitoring and maintain archival logging for network systems.
• Implement a Zscaler Zero Trust solution for TIC 3.0 deployment and manage IP Address allocations with IPAM.
• Administer and manage Unix/Linux operating systems and deploy and maintain Zscaler related physical and virtual machines.
Required Skills and Qualifications:
• Bachelor's degree in computer science or management information systems or equivalent discipline.
• Minimum of 7 years of IT experience, with 4 years of experience supporting networks and network security solutions and tools.
• Hands-on experience with Zscaler, Infoblox, Dynatrace, ProofPoint, Cisco, Xymon, MS IPAM, and Unix/Linux.
• Direct experience configuring and troubleshooting forward and reverse proxies and network firewalls.
• Experience with design, installation, maintenance, and coordination of ATIC and evaluating complex hardware and software and peripheral equipment for large, complex networks.
• Proven experience managing network performance, 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.
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