System Administrators IV

LinTech Global•Washington, DC

2d•Onsite

About The Position

Dexian Government Solutions is recruiting a senior-level System Administrator IV to support the Defense Health Agency (DHA) GSP TO7 at ATAMMC, Fort Belvoir, Virginia. The role is responsible for the operation and upkeep of the computer systems, servers, and networks supporting the mission. It supervises system administration functions, provides strategic direction, mentors junior staff, and manages the day-to-day integrity, security, and availability of infrastructure platforms. The administrator also collaborates with architecture and engineering teams to evaluate and implement infrastructure solutions and serves as site lead for infrastructure projects. The position supports Monday through Friday, 0600–1800 contract hours and participates in an on-call/call-back rotation for Engineering Services. The role requires ten years of progressive system administration experience, advanced DoD Cyber Workforce Framework proficiency, a qualifying security certification, and a Tier 3 background investigation with favorable suitability adjudication before duties begin. A master's degree in Computer Science, Information Technology, or a related field is required, or equivalent years of experience. Dexian Government Solutions provides IT and engineering services to civilian and defense agencies. The company describes itself as an award-winning, ISO 9001:2015-certified business and GSA contract holder.

Requirements

Ten years of progressive experience demonstrating 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, such as PowerShell and Bash, for system management tasks.
Advanced DoD Cyber Workforce Framework (DCWF) proficiency; 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 required to start.
Tier 3 (T3) Background Investigation required; favorable suitability adjudication is required before duties commence.
Customer approval, suitability to hold a public trust, and successful completion of a preemployment background screening are required.

Responsibilities

Deploy, sustain, and troubleshoot server operating systems and related infrastructure.
Manage the daily 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 technical documentation, including SOPs, maintenance guides, and knowledge base articles.
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.
Perform root cause analysis to identify, document, and resolve problems as directed.
Apply and document application STIGs and obtain approval for them.
Participate in the Engineering Services on-call/call-back rotation.