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Linux System Administrator - Located in Blooming Grove, NY

Company: Mediacom
Location: Ossining
Posted on: May 9, 2022

Job Description:

Located in Blooming Grove, NY

SPECIFIC RESPONSIBILITIES:

  • Creation/Deployment of VMs using VMWare, building and integrating systems based of business requirements, and working with different teams to validate interfaces.
  • Maintenance and monitoring of development & testing equipment running Red Hat Linux. Troubleshooting with development teams, making OS changes, testing changes and documenting changes for hand off to production teams.
  • Responsible for changes, validation and deployment of functionality of enterprise level DNS/DHCP infrastructure Build and modify Ansible jobs to provision new RHEL systems via Satellite; setup other OS automations to streamline repetitive administration via Ansible Tower/Satellite 6 system.
  • Keep abreast of latest changes, vulnerabilities and feature availability for Red Hat Linux, Red Hat Directory Services, Ansible, GlusterFS, Splunk, vCenter, NGNIX.
  • Perform hardware and software installations, upgrades, and troubleshooting of OS, provisioning, email and web-based applications.
  • Perform resource monitoring, performance tuning and scaling of infrastructure as needed on RHEL systems.
  • Customize scripts to kickstart RHEL systems; setup Ansible automations to streamline repetitive administration.
  • Maintain and apply changes necessary on 2-factor authentication platform and apply understanding of SSSD and DUO-SAML.
  • Work closely with application support & security teams to maintain up-to-date patch levels and application specific feature configuration.
  • Document Linux configurations and procedures participate in environment planning meetings and communicate environment requirements to management.
  • Participate in on-call rotation and work to resolve critical issues 24/7
    EXPERIENCE/SKILLS :
    • Bachelor's degree in MIS, CS or related field required.
    • 3-5 years' experience with RHEL versions 7/8, CentOS, system administration in an enterprise environment required.
    • 2-4 years' experience supporting web, NGINX, HAProxy and LB
    • 1-2 years' experience working with and support VMWare & vCenter v6.
    • 1-2 years' experience in network support
    • Ability to multitask and or related support mechanisms for escalation/resolution purposes.
    • Understanding of PHP, NGINX, Ansible, HAProxy, 2-factor authentication, sssd, firewalld, LDAP/LDAPS setup, GITLAB, python
    • Knowledge of Internet server protocols and utilities (DNS, DHCP, SMTP, POP, IMAP, HTTP/S, SSL, TLS, S/FTP, TCP/IP, SSH, iptables)
    • Knowledge of security hardening and system performance tuning
    • Advanced enterprise level skills in shell scripting and programming with vi editor.
    • Knowledge of enterprise Technologies (Ansible Automation Software, NFS, Kickstart, RedHat Satellite 6, Active Directory, RHEL 8 features, performance analysis tools such as AppDynamics, mail, SELINUX/firewalld.
    • Experience with troubleshooting and problem-solving skills with little supervision (email, network, hardware, OS).
    • Understanding of RHEL and/or software-based cluster configurations and concepts such as keepalived.
    • Performance tuning and monitoring (Nagios)
    • Technical documentation skills.
    • Ability to exercise discretion and independent judgement.
    • Working knowledge of Splunk, GlusterFS, NetApp, Cisco UCS helpful

Keywords: Mediacom, Yonkers , Linux System Administrator - Located in Blooming Grove, NY, IT / Software / Systems , Ossining, New York

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