Network System Administrator

System Administrator Duties and Responsibilities:

• Maintains web environment by identifying system requirements, installing upgrades and monitoring system performance.
• Establishes web system specifications by analyzing access, information and security requirements and designing system infrastructure.
• Establishes web system by planning and executing the selection, installation and configuration; testing of server hardware, software, and operating and system management systems and defining system and operational policies and procedures.
• Maintains web system performance by performing system monitoring and analysis and performance tuning; troubleshooting system hardware, software, and operating and system management systems; designing and running system load/stress testing and escalating application problems to vendor.
• Secures web system by developing system access, monitoring, control and evaluation; establishing and testing disaster recovery policies and procedures; completing back-ups; and maintaining documentation.
• Upgrades web system by conferring with vendors and services and developing, testing, evaluating, and installing enhancements and new software.
• Meets financial requirements by submitting information for budgets and monitoring expenses.
• Updates job knowledge by tracking emerging internet technologies, participating in educational opportunities, reading professional publications, maintaining personal networks and participating in professional organizations.
• Accomplishes organizational goals by accepting ownership for accomplishing new and different requests and exploring opportunities to add value to job accomplishments.

System Administrator Job Description

We are seeking a skilled and proactive System Administrator to ensure the reliable operation, security, and continuous improvement of our organization’s IT infrastructure.  The ideal candidate will manage stand-alone ‘air-gapped’ Windows 11, Ubuntu, and RHEL computers.  Other tasks might include servers, networks, and critical systems across on-premises and cloud environments, ensuring high availability, performance, and DCSA compliance. 

Key Responsibilities:

• System Maintenance & Configuration: Install, configure, and maintain servers, operating systems (Windows, Linux), virtualization platforms (VMware, Hyper-V), and network infrastructure. 
• Security & Compliance: Implement and enforce security policies, manage firewalls, conduct vulnerability assessments, ensure data backup and disaster recovery protocols are in place, and maintain compliance with government and industry standards. 
• Troubleshooting & Support: Diagnose and resolve hardware, software, and network issues promptly; provide technical support to end-users and collaborate with IT teams to minimize downtime. 
• Automation & Scripting: Develop and maintain scripts (PowerShell, Bash, Python) to automate routine tasks, improve efficiency, and support monitoring and reporting. 
• Documentation & Communication: Maintain accurate documentation of system configurations, procedures, and incident resolutions; communicate technical information clearly to non-technical stakeholders. 
• Experience in multiple OS platforms with emphasis on Linux (CentOS, Red Hat, Ubuntu), and Windows systems
• Experience working in a research environment that relies extensively on Open Source solutions
• In-depth knowledge of the TCP / IP protocol suite, security architecture, securing and hardening Operating Systems, Networks, Databases and Applications.

Qualifications:

• Bachelor’s degree in Computer Science preferred, Information Technology, or a related field (or equivalent experience).
• 3–5 years of experience in system administration, with proven expertise in Windows and Linux environments.
• Strong knowledge of Active Directory, DNS, DHCP, TCP/IP, and network protocols.
• Experience with virtualization (VMware, Hyper-V), cloud platforms (AWS, Azure), and backup solutions.
• Proficiency in scripting languages and automation tools.
• Relevant certifications (e.g., Microsoft MCSE, CompTIA Server , AWS Certified SysOps Administrator) are highly desirable. 

This role requires a self-motivated, detail-oriented professional who thrives in a dynamic environment and is committed to continuous learning and innovation. Join us in building a secure, scalable, and future-ready IT foundation.