Sr. Linux/Unix Systems Administrator
Marathon TS, Inc. - Washington, DC

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Function as a senior Linux administrator responsible for the security and monitoring of Linux servers in development, test and production environments. Plan, develop, test, and deploy application software, system software and security updates. Solve complex integration and technical problems in a dynamic fast-paced environment. Work with other Systems administrators, DBAs, and application developers to resolve issues. Basic administration tasks on RedHat servers including, but not limited to; User maintenance, storage management, patching, server builds, Satellite Server maintenance, secondary support for various Java applications on RHEL servers.


6+ years Linux systems administration experience specifically in managing or supporting RedHat and/or Centos Linux in production environments
General Administration of Unix/Linux - Installation, Users Creation, Group Creation, Permissions, Creations of Folders, Mail/SMTP, Web (Apache, Tomcat), FTP, DNS, Proxy, Samba, Firewall (NAT, IP Tables, Packet Filter, IP Filter), LDAP, NFS, NIS, NFS/CIFS/FCP
Experience configuring Linux guests in a VMware ESX environment
Experience supporting VMWARE infrastructure in a large enterprise environment
Perform problem diagnosis, troubleshooting and resolution
Perform new hardware and Linux OS installations, patching and upgrades
Maintain operating systems and associated infrastructure software
Secure and harden newly built and upgraded servers for government accreditation
Provide Tier II and III technical support including participation in a 7/24/365 on-call rotation