Senior Systems Administrator (JDOC)

Clearance Level
Systems Administration
Doral, Florida
Onsite Workplace
Key Skills For Success

Microsoft Windows Server

System Administration


VMware VDI

REQ#: RQ162308
Requisition Type: Regular
Your Impact

Own your opportunity to work with the largest government agency in the nation. Make an impact by advancing the Department of Defense’s mission to keep our country safe and secure.

Job Description
Senior Systems Administrator

Job Description Summary:

Work Location: Onsite - Doral, FL (No telecommuting option)

Clearance: Top Secret (SCI eligible)

Shift: Shift Varies (Supports 24x7 operations)

GDIT provides enterprise-wide IT services in support of US Southern Command’s (SOUTHCOM) mission critical operations throughout their Area of Responsibility (AOR), which consists of Central America, South America, and select countries in the Caribbean. SOUTHCOM is headquartered in Doral, FL.

GDIT SOUTHCOM Cyber Information Technology Enterprise Services (SCITES) is working to deliver and operationalize information technology (IT) services for all US SOUTHCOM combatant command constructed networks. These constructed networks span the US SOUTHCOM Area of Responsibility (AOR). Work performed under this Task Order directly provides US SOUTHCOM a defensible, secure, modern, and efficient IT infrastructure across all combatant command constructed networks.

We have an opportunity for a Senior Systems Administrator to work in support of SOUTHCOM Cyber Information Technology Enterprise Services (SCITES).

This position supports SOUTHCOM's transformative move to a Zero Trust Architecture in alignment with the DoD Zero Trust Strategy and Executive Order (EO) 14028.

Responsibilities and Tasks:
  • Responsible for systems administration, operations, maintenance, and associated activities of platforms installed throughout the USSOUTHCOM, enterprise.

  • Provide Tier 3 system administration support for 24/7 operations within the US SOUTHCOM Joint DoDIN Operations Center (JDOC).

  • Deploy Operating System, baseline software updates, and third-party updates via Microsoft Endpoint Configuration Manager.

  • Administer Active Directory: users, groups, objects, forests/trees/domains/child domains, DNS, Group Policy/AGPM, ADFS, AD LDS, etc.

  • Administer VMware virtual environments to include ESXi hosts, vCenter appliances, Vsphere, Horizon, VDI, profile unity, and VSANs.

  • Responsible for applying security principles, practices, and procedures under the Risk Management Framework (RMF) to maintain compliance with applicable security regulations.

  • Download, stage and deploy systems-related security policies and updates to maintain information system compliance with DISA security policies and procedures (STIGs, IAVAs, etc.)

  • Creates and maintains detailed system documentation.

  • Maintains current knowledge of rapidly changing technology, always on the lookout for new technologies, and works with management to evolve current processes.

  • Develop scripts (PowerShell, VBScript, etc.) to perform recurring systems administration tasks, automate installs, gather metrics, etc.

  • Troubleshoots highly complex system hardware and software issues.

  • Develops training materials for end users on the proper use of hardware and software.

  • Develops implementation plans for software installations and upgrades to operating systems and layered software packages.

  • Monitors and tunes systems to achieve optimum performance levels.

  • Ensures workstation/server data integrity by implementing standard software and hardware solutions.

  • Leads efforts to ensure data/media recoverability by following a schedule of system backups and database archive operations.

  • Conducts advanced hardware and software audits of workstations and servers to ensure compliance with established standards, policies, and configuration guidelines.

  • Support change management activities and resolve Tier 3 hardware and software problems.

  • Coordinate with vendor tier 4 support to troubleshoot issues as required.

  • Develops advanced technical solutions for the management of networks, software, hardware, configurations, and architectures.

Experience/Training Desired:
  • Experience administering enterprise environments, supporting Operations and Maintenance (O&M) of servers (physical and virtual), Operating Systems (Windows, Linux, etc), databases (SQL, Oracle), collaboration tools (SharePoint, Teams, Jabber), virtualization technology, software applications, scripting, SANs, and computer security in an enterprise.

  • Experience Windows infrastructure services: DHCP, DNS. Authentication, Active Directory, Group Policy, profile management support services, desktop software provisioning.

  • Experience with infrastructure including but not limited to: data center operations, server hardware, operating systems (Windows, Linux), web servers, databases, virtualization (VMware), networking, storage, monitoring, etc.

  • Experience with VMware technologies: Vcenter, Vsphere, ESXi, VSAN, Horizon, etc.

  • Experience with Liquidware Profile Unity, Dell Wyse Management Suite.

Education Required:
  • BA/BS or equivalent with 5+ years of experience or 10+ years of experience.

Certification(s) Required:
  • DoD 8570 compliant:

    • IAT Level II or III Baseline Certification.

    • Computing Environment (CE) Certificate.

    • More Details:

Certification(s) Desired:
  • Microsoft Administrator Certification (MCSA, MCSE, DP-300, AZ-104 etc.).

  • VMWare Certifications:

    • Desktop Management (VCP-DTM)

  • Data Center Virtualization (VCP-DCV)

Clearance Required:
  • Must be a U.S. citizen.

  • Must be able to obtain a fully adjudicated Top Secret SCI clearance.

  • Must have interim clearance and required certifications prior to start in role.

Travel Requirements:
  • 0%. No travel required.

Work Requirements
Years of Experience

5 + years of related experience

* may vary based on technical training, certification(s), or degree


Travel Required



U.S. Citizenship Required

About Our Work

We are GDIT. A global technology and professional services company that delivers consulting, technology and mission services to every major agency across the U.S. government, defense and intelligence community. Our 30,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 30 countries worldwide, offering leading capabilities in digital modernization, AI/ML, Cloud, Cyber and application development. Together with our clients, we strive to create a safer, smarter world by harnessing the power of deep expertise and advanced technology.

GDIT is an Equal Opportunity/Affirmative Action employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status, or any other protected class.