Enterprise Linux System Administrator

Company Description 

ESSENTIAL DUTIES AND RESPONSIBILITIES

• Daily maintenance of our Linux environment, which includes additional server builds, upgrades, and patching.
• Performance tuning and ensuring high availability of infrastructure.
• Design and develop infrastructure monitoring and reporting tools.
• Develop and maintain configuration management solutions.
• Develop test automation frameworks in collaboration with rest of the team.
• Create tools to help teams make the most out of the available infrastructure.
• Perform other job-related duties as assigned.

REQUIRED SKILLS AND ABILITIES

• Experience with Linux server builds, maintenance, administration, and patching.
• Experience with Linux servers in virtualized and Cloud environments
• Experience with AWS and Linux web servers
• Experience installing, configuring, and maintaining services such as Bind, Apache, MySQL.
• Installation, configuration, and maintenance of m Let's Encrypt management.
• Creation and maintenance of Ansible scripts for automation.
• Experience with installation, configuration, and maintenance of the DNS service, on premise and AWS R53.
• Proficient with network tools such as iptables, Linux IPVS, HAProxy, etc. 
• Administration and maintenance of HAProxy configurations.
• Maintenance and monitoring of FTP (SFTP) services.
• Installation, configuration, and maintenance of multiple Postfix Smarthost email servers.
• Maintenance, configuration, and monitoring of CRM (Customer Relationship Management) application.
• Maintenance of cloud-hosted status sites on Linode.
• Monitoring and maintenance of scheduled cron jobs.
• Familiarity with the fundamentals of Linux scripting languages
• Strong grasp on configuration management tools
• Familiarity with load balancing, firewalls
• Familiarity with infrastructure monitoring tools such as ELK, Zabbix, ELMA, Prometheus, Grafana.
• Ability to build and monitor services on production servers
• Knowledge of servers and switches 
• Excellent written and verbal communication skills
• Strong attention to detail and problem solving skills
• Able to work independently or as a member of the team.
• Creative thinking and ability to ‘think outside the box’
• Well organized, attentive to details, and able to meet demanding deadlines

KNOWLEDGE, EXPERIENCE AND/OR EDUCATION

• 7+ years as a Linux Systems Administrator
• Experience with Apache, Litespeed, CentOS, Ubuntu, Cacti, DNS, hosted services, MySQL, R1soft, WordPress, cPanel, ELK, Zabbix, Ansible, HA Proxy
• Background in IT or on a Data Center teams
• System Monitoring and Automation
• Good knowledge of network design – Working with Firewalls, DNS, Load Balancers
• Strong sense for security – both internally and on the hosting systems
• Advanced Linux System Administration, Configuration, and System Security
• Advanced systems troubleshooting skills
• Prefer some programming experience (particularly Perl, PHP, HTML, MySQL)
• Prior experience in software as service architectures (SaaS)

OTHER REQUIREMENTS

• Strong preference to Houston area because of the Datacenter location.
• Participate in the on-call rotation.