System Administrators IV

LinTech Global•Washington, DC

1d•Onsite

About The Position

Dexian Government Solutions is recruiting a senior-level System Administrator to support its contract at the Defense Health Agency (DHA) GSP TO7 in ATAMMC, Fort Belvoir, Virginia. The role is responsible for operating and maintaining the computer systems, servers, and networks that support ATAMMC. It oversees system administration functions, provides strategic direction, mentors junior staff, and manages the integrity, security, and availability of infrastructure platforms. The administrator also works with architecture and engineering teams to evaluate and implement infrastructure solutions and leads infrastructure upgrade and optimization projects as site lead. The position supports Microsoft Windows Server, Linux, VMware, and Microsoft Active Directory environments. It involves operating-system deployment and troubleshooting, backups and recovery, performance and capacity monitoring, security maintenance, DISA STIG compliance, automation and scripting, documentation, and root cause analysis. The role participates in an Engineering Services on-call/call-back rotation. Contract support hours are Monday through Friday, 0600–1800. The work location is 9300 DeWitt Loop, Fort Belvoir, VA 22060. A Tier 3 (T3) Background Investigation and favorable suitability adjudication are required before duties begin, and the role requires customer approval and successful completion of pre-employment screening.

Requirements

Ten years of progressive experience demonstrating the required proficiency in system administration.
Experience deploying and sustaining enterprise server operating systems, including Microsoft Windows Server, Linux, and VMware.
Experience managing Microsoft Active Directory in enterprise environments.
Experience with backup and recovery operations, performance monitoring, and capacity analysis.
Experience creating and maintaining technical documentation, including SOPs, maintenance guides, and knowledge base articles.
Experience with DISA STIG compliance in DoD IT environments.
Proficiency in automation and scripting for system-management tasks, such as PowerShell or Bash.
DoD Cyber Workforce Framework proficiency level: Advanced.
Cyber Role Designation: 451 - System Administrator - Advanced.
Master's degree from an accredited college or university in Computer Science, Information Technology, or a related field, or equivalent years of experience.
SecurityX, CASP, or CISSP certification is required to start.
Tier 3 (T3) Background Investigation is required; all personnel must obtain favorable suitability adjudication before beginning duties.
Customer approval, suitability to hold a public trust, and successful completion of pre-employment background screening are required.

Responsibilities

Deploy, sustain, and troubleshoot server operating systems and related infrastructure.
Manage the day-to-day administration, integrity, security, and availability of infrastructure platforms.
Perform daily system backups, monitor performance and capacity, and maintain a secure operational posture.
Create and maintain SOPs, maintenance guides, knowledge base articles, and other technical documentation.
Collaborate with architecture and engineering teams to evaluate, recommend, and test infrastructure hardware and software.
Perform infrastructure maintenance and security upgrades.
Automate system-management tasks by writing scripts using common scripting languages.
Provide strategic direction for system administration and mentor junior staff.
Lead infrastructure upgrade and optimization projects and manage as site lead.
Install, configure, maintain, and optimize Microsoft, Linux, and VMware server operating systems.
Sustain Microsoft Active Directory, including creating and maintaining objects.
Conduct root cause analysis to identify, document, and resolve problems as directed.
Apply, document, and obtain approval for application STIGs.
Participate in the Engineering Services on-call/call-back rotation.