Sr System Admin

📋 Description

• • Provide global administration and technical support for core Active Directory services including replication, forest and domain trusts, DNS, DHCP, and PKI.
• • Configure, maintain, and support Windows-based servers for internal and external customers, with focus on Windows Server 2016, 2019, and 2022.
• • Install, configure, and manage hardware, operating systems, and applications across a large-scale Windows server environment (50+ servers).
• • Administer user accounts, printer configurations, security policies, system backups, and recovery procedures.
• • Analyze and document infrastructure to develop monitoring strategies for in-house applications, inter-process communications, messaging, middleware, and collaborative software.
• • Participate in resolving customer change requests and problem tickets outside standard business hours, including after-hours and weekend support.
• • Perform 24x7 on-call duties with pager response as part of a rotational schedule.
• • Design, implement, and maintain Microsoft operating systems and technologies alongside third-party applications such as Citrix Server or VMware ESX Server.
• • Support network infrastructure applications including messaging, database, intranet, internet communications, and operating system administration.
• • Configure and troubleshoot server-class hardware, with preference for HP C-Class blade systems and related technologies.
• • Utilize PowerShell and .NET for automation and system management tasks.
• • Apply IT Infrastructure Management Frameworks such as ITIL and Microsoft Operations Framework to optimize service delivery.
• • Implement monitoring methodologies and technologies to ensure system availability and performance.
• • Develop hardware and software cost of ownership models and present findings to management.
• • Identify root causes of system issues through a consistent, layer-by-layer logical approach.
• • Anticipate potential system failures and create contingency plans to mitigate risk.
• • Manage multiple concurrent projects and daily operational responsibilities with high accuracy and efficiency.
• • Communicate technical concepts clearly in written and spoken English to both technical and non-technical stakeholders.
• • Demonstrate knowledge of hardware/software architecture and implement solutions aligned with company needs.