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Windows and Linux System Administrator

Location Singapore, Singapore
Posted 25-August-2021
Description
Primary Purpose:

Windows and Uinux System Admin that will manage the server configuration and its operating system. This includes tracking, maintaining server health and activity, troubleshooting, performing software upgrades and patches, performing review of logs, server backup and recovery, performing periodic password changes for backend system and service accounts.
The team shall configure, manage and maintain the operating systems. This includes the patching of operating system, performance monitoring, troubleshooting, and periodic password changes for backend system and service accounts.
The team shall work with the various network stakeholders in troubleshooting and resolving network-related issues.

Responsibilities:

Monitor EOL of all existing technologies
System configuration, upgrade, patching, administration and monitoring of Operating Systems (Windows Server 2016 and above, SUSE Linux)
Perform Security activities and OS patching for Windows and Linux servers
Responding and resolving incidents that may arise in the production and non-production SAP environments
Deploy OS patches/updates
Perform password changes
Resolve findings in the Network & Host (operation system) vulnerability scanning
Perform OS hardening with the provided hardening guides
Perform all housekeeping tasks of all systems
Support daily technical works, issues, and requests within the landscape. Simulate (in non-Production system like DEV/QA) to resolve technical problems reported in Production.
Monitor servers, network, Firewall, UPS, storage and equipment in Development and DR server rooms. Log case with vendors for any faults or error/warning messages that need their attention. Follow up with vendors until the problems are resolved.
Able to work independently and collaboratively in a project environment
Provide Technical documentation with minimum supervision and within an agreed deadline.
Support SAP backup and restore procedures for database-specific and OS-specific systems.
Weekend and occasional OT support are expected Secondary responsibilities:
Manage and experience in Citrix Administration with both XenApp and XenDesktop with multiple sites and farms
Troubleshooting of Citrix Presentation Server, XenApp and XenDesktop.
Mange Secure gateway/ Web Interface / NetScaler
Resolves issues relating to Active Directory, DNS, WINS, User Rights Assignments, thin clients, thin client management tool, desktop operating systems, Print and File servers, firewalls and networking
Resolve issues relating to 2 Factor Authentication and smart cards on clients
Patching of MicroStrategy Server (software patches)
Upgrading of MicroStrategy Server (Installation of new MSTR version) in PRD & DEV/QA
Cloning of MicroStrategy server instances for app testing purposes prior to major upgrade
Prepping and scheduling scripts to run in the server backend to ensure MicroStrategy app complies with the latest security audit policy
Maintenance & Extraction of MicroStrategy logs for investigative purposes
Liaise with MicroStrategy support for issues (MicroStrategy OSS) raised by App team
Liaise with DBA team to ensure MicroStrategy server instance is running after a server upgrade or a change of server. (Hardware)

Pre-requisite:

The educational qualifications of the SA for Windows and Unix Systems shall have at least at least a diploma in Computer Science, Computing or IT or equivalent. A degree in Computer Science, Computing, Engineering, IT or equivalent is preferred
Minimum two (2) year of experience in administration of Microsoft Technologies (e.g. Windows Server, Active Directory)
Minimum two (2) year of experience in administration of UNIX systems (e.g. SUSE Linux)
Knowledge of Windows and virtualisation setup (e.g. Hyper-V, VMware, etc.) and administration, Web Tools (Proxy/Reverse Proxy Setup, Apache, IIS, SAP Webdispatcher), IT Security Hardening on Windows Server 2008/2012/2016, Linux.
Minimum two years experience in IT infrastructure, systems implementation and support.
Good knowledge of Management Tools (SCCM, WSUS, SEPM, SCVMM). Virtualization Platform (VMware, Hyper-V), Storage and Backup (Symantec NetBackup).
Advantages having the following experiences:
At least 2 years of experience in Citrix Administration with both XenApp and XenDesktop with multiple sites and farms
Strong knowledge in troubleshooting of Citrix Presentation Server, XenApp and XenDesktop. Have performed Citrix upgrade and farm migration from planning through implementation
Strong knowledge in Citrix Secure gateway/ Web Interface / NetScaler
Solid working knowledge of Active Directory, DNS, WINS, User Rights Assignments, thin clients, thin client management tool, desktop operating systems, Print and File servers, firewalls and networking
Solid working knowledge of 2 Factor Authentication and smart cards
At least two (2) years of experience in System Integration, Network and Support.
Knowledge of Citrix Secure gateway/ Web Interface / NetScaler, Active Directory, DNS, WINS, User Rights Assignments, thin clients, desktop operating systems, firewalls and networking would be an advantage.
At least three (3) years of experience as MicroStrategy Administrator with hands-on experience in configuring Enterprise Manager, User Manager, Integrity Manager, Command Manager, and Narrowcast Server
At least three (3) years of experience in analysis of system performance, database performance, and system health checks & implement tuning improvements.
Familiarity with data warehousing concepts and techniques such as dimensional modelling, star schemas, SQL and SQL query tuning
At least two (2) years of experience in System Integration, Network and Support.
Knowledge of business intelligence, visualization, and self-service analytics platforms, ETL, tool administration or BIA reporting tool administration would be an advantage.


 
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