Linux System Administrator
Advantex Professional Services - El Segundo, CA

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Systems Administrator (Linux)

Work with our client to help them with our virtual private cloud as a member of the UNIX/Linux Operations Group. The ideal candidate will maximize up time with minimum effort and will thrive in a dynamic environment. Additionally, the right person will be able to advise management of system related issues and how to avoid them; ensure that systems remain stable, secure and fast; integrate and leverage new technologies

As a Systems Administrator you will be a part of the team responsible for all UNIX and Linux systems used in production, staging, and development environments. You will be supporting a 24x7 network of websites which attracts over 70 million unique visitors each month.

Setup, configuration, general maintenance and troubleshooting of all Unix and Linux systems.
Administration of server, network and storage hardware.
Management of operating systems and system applications.
Assisting DBAs, Developers and QA users, with application operation, performance tuning, and troubleshooting.
Serve as Subject Matter Expert (SME) for one or more systems such as Monitoring, Configuration Management, Load Balancing, Network and Application Security, Storage Management, Infrastructure Automation, Application/Language Support, and/or Site Migrations. Respond to service outages.
Manage internal systems such as Mail and DNS. Performance tuning of applications such as Apache, Tomcat, lighttpd, nginx, and varnish.

Experience with highly available, multi-node linux environments or server farms.
Familiarity with management tools such as Puppet or Chef.
Experience with at least two UNIX/Linux distributions, eg, RedHat (incl. CentOS, Fedora), Debian (incl. Ubuntu), FreeBSD, OpenBSD Solaris, etc..
Knowledge of managing and configuring RAID systems, including SAN/NAS appliances.
Ability to lift and install Server, Storage, and Network Hardware.
Basic familiarity with at least one networking CLI environment, such as Cisco, F5, Force10, Foundry, Juniper, Brocade, Quagga.
Familiarity with at least one virtualization stack, eg, VMWare, Xen, Eucalyptus, AWS, OpenStack, KVM, etc..
Working knowledge of at least one RDBMS, eg Oracle, MySQL, Postgres, etc..
Strong understanding of security best practices and forensic techniques, eg, tcpdump, wireshark, iptables, ipset.
Scripting in at least one language other than BASH, eg Ruby, Python, Perl, PHP, TCL.
Can participate in 24x7 on-call rotation.
BS or equivalent work experience.

Keywords: UNIX, Linux, Apache, Red Hat, CentOS, Debian, Ubuntu, Systems Administrator, Systems Engineer, LAMP, puppet, security, Xen, qmail, postfix, sendmail, DNS, BIND, Apache, Tomcat, lighttpd, nginx, varnish