Senior Systems AdministratorSupport of 3-tiered 24/7/365 high-availability environments including 24/7 on-call rotationConfiguration and maintenance of common applications such as Apache, MySQL, NFS, NTP, SSH, DNS, and SNMPMiddle-Tier Administration as well as Application Support and deploymentSelf-guided triage and follow-through skills to best respond to assigned dutiesLarge-scale backup solutions and storage technologiesLinux/Ubuntu/CentOS administration of 200+ servers on Enterprise levelAdministration of virtualized infrastructure for non-production/production environmentsConfiguration Management toolsAWS Services (API's, IAM, EC2, VPC, SG's, etc...) is a MUST!Automation of tools for monitoring, process and documentationSystem security techniques and best practicesSupport of 3-tiered 24/7/365 high-availability website and application environmentsHandling all aspects of systems administration, including maintenance of Linux / Ubuntu/CentOS servers, MySQL Servers, back-up and restoration procedures, and scriptingMaintenance of web, J2EE and custom application, mail, local hosted DNS and database serversAdministration of AWS instances, load balancers, S3, RDS and other Amazon services.Maintaining data files and monitor system configuration to ensure data integrityInstallation, deployment and maintenance of hardware, operating systems, middleware and softwareParticipation in departmental and site-wide projectsAbility to manage timelines and milestones in multiple projectsConfiguring, installing and maintaining Linux/Ubuntu/tomcat/Java stacks on vmware and AWS environments, private hosted environments and helping associates understand the operations of the various systems.Candidate should possess ability to troubleshooting related application and network problems.