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    Senior Linux Systems Administrator - Chicago, United States - Gray Tier Technologies LLC

    Gray Tier Technologies LLC
    Gray Tier Technologies LLC Chicago, United States

    4 days ago

    Default job background
    Description
    Gray Tier Technologies has an opening for a

    Linux Systems Administrator

    for the Global Solutions Management – Operations II (GSM-O II) contract.

    This contract includes the Operations, Sustainment, Maintenance, Repair and Defense of the Defense Information System Network (DISN) within the DOD Information Network (DODIN) in support of the Defense Information Systems Agency (DISA).

    This role is primarily remote, but candidates must be within commuting distance to Scott AFB, IL, Ft. Meade, MD, or Ogden, UT, for on-site support.

    Primary Responsibilities

    Work independently to ensure the reliability,

    availability and security of the solution by proactively monitoring the

    system, troubleshooting, and resolving issues to ensure high availability

    and continuity of operations.

    Maintain configuration management and baseline control

    of development, test, pre-production and production environments.

    Conduct regular security scans, analyze results and

    implement resolutions including testing of new hardware and software and

    ensure compliance with DISA STIGs.

    Operate and maintain the solution, including patching

    of operating systems and COTS/FOSS/GOTS applications.

    Perform and test regular backups.

    Monitor and tune system and network performance,

    including RHEL and VMWare systems, for optimal system availability.

    Configure, manage and maintain components of the

    solution (application servers, load balancers, databases, operating

    systems, etc.)

    Deploy systems in the Lab environment, integrate with

    other systems, perform testing and validation.

    Manage, track and maintain configuration items

    including licenses, SSL certificates and the hardware/software baseline.

    Support baseline deployments, upgrades and updates to

    the production environment including the installation and configuration of

    new software and hardware.

    Lead planning and migration of infrastructure and

    applications from the Data Center environment to the AWS cloud.

    Create, maintain and implement detailed documentation

    and maintain standard operating procedures.

    Perform trend analysis on component failures,

    network/node outages, and system performance parameters.

    Interact with software and hardware vendors to evaluate

    vendor products and make recommendations to purchase hardware and

    software.

    Work with network engineers and developers to

    troubleshoot environment issues as necessary.

    Escalate support issues to vendors as necessary and

    coordinate resolution.

    Manage access including creation and management of user

    and service accounts.

    Provide support on a M-F business hours schedule, also

    responsible for on-call, extended hour, and weekend support as required by

    mission or emergency situations.

    Basic Qualifications

    Bachelor's degree in Information Technology, Computer

    Science or a relevant technical discipline and 5 years of relevant

    experience; Additional experience, education and training may be considered

    in lieu of degree.

    Active Secret security clearance.

    Ability to obtain Security+ certification or equivalent

    DoD 8570 IAT II certification within 60 days of start date.

    Experience installing, managing and maintaining RHEL 7

    Linux servers in a production environment

    Experience troubleshooting and managing virtualized

    infrastructure in an VMware ESXi environment.

    Experience deploying and managing infrastructure and

    software applications in AWS

    Experience applying DevOps concepts and tools to

    automate repetitive tasks and ensure baseline consistency across multiple

    environments

    Experience installing, configuring, securing,

    deploying, managing, monitoring and maintaining a variety of complex

    software products across multiple environments.

    Experience with the deployment of McAfee HBSS tools in

    a Linux environment

    Experience with scripting in Bash and experience in

    other languages such as Perl or Python

    Thorough knowledge of TCP/IP networking.

    Application and configuration of security settings and

    other IA best practices, such as those as required by DISA STIGs and SRGs

    Experience supporting, installing and configuring

    enclave Ethernet switches, storage area networks (SAN), and network

    attached storage (NAS).

    Ability to work independently in a fast-paced

    environment.

    Preferred Qualifications

    Red Hat Certified System Administrator (RHCSA)/Linux

    Professional Institute Certification (LPIC)

    Active Secret with SSBI or Top Secret security

    clearance.

    Experience managing HPE integrated BladeSystem

    enclosures, including Onboard Administrator, iLO and interconnect modules

    Experience managing and using Ansible automation tools

    Knowledge of Git and the Git version control model

    Understanding of PostgreSQL, including monitoring,

    managing and maintaining replicated databases

    Experience supporting, installing and configuring

    enclave Fiber/Ethernet switches, HPE storage area networks (SAN)/ network

    attached storage (NAS)

    Experience with a ticketing system such as BMC Remedy

    and/or Atlassian JIRA

    Experience administering and configuring Windows Server

    2012 R2 or higher

    #J-18808-Ljbffr
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