Senior Systems Administrator Job Arlington area,Texas USA,IT/Tech

Design, implement, and maintain core infrastructure services critical to enterprise operations
Provide technical leadership across virtualization platforms, artificial intelligence, identity systems, cloud environments, and enterprise collaboration services
Administer, maintain, monitor, report on, and support operating systems, applications, and services
Apply best practices for SLAs, redundancy, high availability, and disaster recovery
Analyze problems routinely, troubleshoot complex issues, and design resolutions for systems and applications
Lead the design, planning, installation, and support of computer systems, network hardware, software applications, cloud platforms, and peripherals
Support business-driven initiatives through planning and system design
Champion business and digital transformation, including AI, identity federation, and hybrid cloud adoption
Exercise independent judgment in planning, scheduling, organizing, controlling, reporting, and monitoring IT projects
Use the Help Desk ticketing system for incident and problem management, customer interaction, and follow-up
Create and maintain system configuration documentation, standard operating procedures, runbooks, and architecture diagrams
Maintain reports on system downtime, preventative maintenance plans, and disaster recovery
Contribute to cross-training and task/role planning to create growth and education opportunities for junior staff
Assist with management of Active Directory, Group Policies, users, and computers
Provide Tier-3 escalation support and coordinate or elevate unresolved issues and emergencies according to continuity and disaster recovery plans
Liaise with end users, management, and systems departments to resolve IT support issues
Participate in the on-call rotation for production support and support change management processes
Provide shift-based continuous monitoring of on-premises, remote, and cloud compute, platforms, and storage performance for a global network infrastructure

Requirements

Bachelor’s degree in a computer-related curriculum and 5 years of networking and operating system experience, or AA degree and 6+ years in networking and operating system design, test, and maintenance, or equivalent related experience
Experience managing/implementing VPS Windows and Linux server technologies, including RHEL, CentOS, Alma Linux, Rocky, and Ubuntu, on-premises and in the cloud
Strong understanding of Active Directory, DFS, DNS, DHCP, and Group Policy management
Experience with Microsoft Office 365/Azure, including Exchange Online, Teams, SharePoint Online, InTune, Purview, Copilot Studios/Microsoft Foundry, BLOB storage, NSG, Azure Firewall, and Conditional Access Policies
Experience with hypervisor technologies such as Broadcom/VMware, Hyper-V, and Azure Local
Experience with virtual desktop technologies such as Azure Virtual Desktop, Omnissa Horizon, and Citrix Virtual Desktop
Experience with database technologies including Microsoft SQL, Postgres, and mySQL
Experience with web servers including IIS, Apache/Tomcat, and Nginx
Experience with mail security gateways including Iron Port, ProofPoint, and Exchange Online Protection
Experience with identity management and federation services including Microsoft ADFS/Entra, Identity Federation, and Cisco DUO
Experience with platform configuration/monitoring tools such as PRTG, Solar Winds, and Nagios
Knowledge of TCP/IP networking and related network services, including DNS, ARP, VLANs, SMTP, DHCP, and load balancers
Must be self-motivated and able to work in a team environment
Well-refined troubleshooting skills and ability to determine root cause and resolve systemic problems
Ability to manage multiple tasks and prioritize issues effectively
Ability to create, document, and follow processes and procedures
Must be eligible for DoD Personal Security Clearance
Must hold one or more of: VMware Certified Professional (VCP), CompTIA Network+, Microsoft Certified Solutions Associate (MCSA), Cisco Certified Network Associate (CCNA), or CISSP
Must be a U.S. citizen due to U.S. Government contract requirements
Preferred: experience with SAN, NAS, virtual storage, backup technologies, Copilot…