Senior Systems Administrator

Clearance Level
Top Secret/SCI
Systems Administration
Doral, Florida
Onsite Workplace
Key Skills For Success

Active Directory (AD)


Red Hat Enterprise Linux (RHEL)


REQ#: RQ170045
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

Title: Senior Systems Administrator

Clearance Required: TS/SCI

Location:  USA FL Doral - 9301 NW 33rd St (FLC022)

Please take this opportunity to join one of GDIT’s fastest growing and long-standing programs! US Battlefield Information Collection and Exploitation System Extended (US BICES-X) is a cutting-edge program supporting DoD intelligence information sharing on current and emerging global threats to mission and coalition partners and emerging nations. With an internationally dispersed team supporting each combatant command, the US BICES-X team is in direct support of the war fighter and their missions. We are seeking a creative and driven professional with a passion for solving real world issues on a cross-functional, fast paced team. This position affords the opportunity to mentor others and grow professionally both on your own and as part of a team.


  • Manage and maintain Windows Active Directory & DNS services, ensuring seamless authentication and domain name resolution across the network.

  • Administer Dell IDPA DP 4400 for efficient data protection and backup solutions, ensuring data integrity and disaster recovery preparedness.

  • Implement and manage Red Hat Certificate Services (RDCS) for secure authentication and encryption services within the network infrastructure.

  • Configure and support RHEL 8 & 9 servers, including installation, patching, and troubleshooting to ensure system stability and security.

  • Utilize Puppet for configuration management, automating routine tasks and maintaining consistency across servers and applications.

  • Administer RSA Authentication Manager Enterprise for secure access control and multi-factor authentication mechanisms.

  • Manage Configuration Manager and WSUS for Windows patch management, ensuring timely updates and compliance with security standards.

  • Maintain and optimize MS SQL2019 databases, including performance tuning, backup strategies, and disaster recovery planning.

  • Administer Windows Server 2019 environments, including Active Directory services, Group Policy management, and server virtualization.

  • Oversee VMware Vcenter and VMware ESXi environments, including virtual machine provisioning, performance monitoring, and resource allocation.

  • Perform Security Technical Implementation Guides (STIGs) assessments and implement necessary configurations to ensure compliance with cybersecurity standards and best practices across the network infrastructure.

  • Collaborate with cross-functional teams to design and implement solutions for complex technical challenges and business requirements.

  • Stay updated with industry trends, emerging technologies, and security threats to proactively identify opportunities for improvement and risk mitigation within the network environment.


Required Qualifications:

  • 5+ years Systems Administration experience is required.

  • BA/BS degree, may substitute additional years of experience.

  • Must possess and maintain a TS/SCI Clearance.

  • Strong experience and expertise in managing Windows Active Directory & DNS services, including domain controllers, group policies, and DNS configurations.

  • In-depth knowledge of VMware Vcenter and VMware ESXi, with hands-on experience in virtual machine management, resource allocation, and performance monitoring.

  • Experience in administering backup and data protection solutions, such as Dell IDPA DP 4400 or similar backup appliances.

  • Knowledge of MS SQL2019 databases, including installation, configuration, performance tuning, and backup strategie

Preferred Qualifications:                 

  • Knowledge and experience with the NSA Commercial Solutions for Classified (CSfC).

  • Knowledge and experience with PKI certificate services.

  • Familiarity with RSA Authentication Manager Enterprise for implementing multi-factor authentication mechanisms and access control.

  • PowerShell scripting

  • Python Scripting

  • Red Hat Certified System Administrator (RHCSA) or Red Hat Certified Engineer (RHCE)

  • VMware Certified Professional (VCP)

  • Microsoft Certified: Azure Administrator Associate or Microsoft Certified: Windows Server certification

  • Puppet Certified Professional (PCP)

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

Salary and Benefit Information

The likely salary range for this position is $93,500 - $126,500. This is not, however, a guarantee of compensation or salary. Rather, salary will be set based on experience, geographic location and possibly contractual requirements and could fall outside of this range.
View information about benefits and our total rewards program.

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.