Senior System Administrator

nanosoft it solutions pte. ltd.; Singapore; On-site; SGD 60,000 - 90,000; Full time

Job summary

nanosoft it solutions pte. ltd. is seeking a hands-on IT systems administrator to support and optimize our cross-region infrastructure.

You will manage 5 Windows and 8 Linux servers and about 200 desktops across three regional offices, delivering 24/7 support and ensuring system availability. Responsibilities include configuring NFS, LDAP, Email servers, web servers (Apache/IIS), SSL certificates, VM environments (Oracle, VMware), and AD with DNS/DHCP; perform hardware upgrades and migrations,

Qualifications

• Experience in multi-OS system administration and 24/7 support environments.
• Hands-on expertise with Windows/Linux servers, AD, DNS/DHCP.
• Familiarity with virtualization, backups, and network protocols.

Responsibilities

• Provide 24/7 support for technology infrastructure across multiple offices.
• Configure and manage NFS file sharing across the network.
• Manage jobs, batch processing, and scheduling tasks.
• Install and configure web servers (Apache, IIS) and SSL certificates.
• Administer virtualization environments (Oracle, VMware).
• Perform hardware upgrades, migrations, and offsite backups.

Skills

System administration

Network troubleshooting

VM management

Technical documentation

Tools

Windows Server

Linux Admin

VMware

Oracle VM

Active Directory

LDAP

NFS

Postfix/Sendmail

SSL/TLS

Apache

IIS

Samba

LVM

Red Hat Linux

Kickstart

DNS

FTP

TCP/IP

DHCP

Backup

Job description

• Delivered twenty-four hour support for all technology infrastructure needs and issues, for environment including 5 Windows and 8 Linux based servers and 200 desktops and laptops (Windows, MAC and Linux) across three regional offices
• Efficiently implemented network file sharing by configuring NFS to share files and resources across the network
• Managing corn jobs, at Jobs, batch processing and job scheduling
• Hands on experience in protocols such as TCP/IP, DHCP, HTTP, SMTP, SSH, FTP
• Installed and configured SSH, SFTP, Managed email (Postfix and Sendmail), LDAP
• Installed Apache, IIS and configured Virtual hosts and also experience applying SSL certs for websites, CSR generation
• Installation of SAMBA utility software
• Create File systems using Logical Volume Management (LVM), LV Extend and Reduce
• Linux kernel, memory upgrades and swaps area and performed Red hat Linux Kickstart installations
• Provided systems and server management and oversight and resolution of network/connectivity and software issues for local and remote users
• Worked with Server OS performing setup, maintenance and troubleshooting for 2000, 2003, 2008, Responsible for building, configuring, and supporting workstations and servers.
• Performed hardware builds (upgrades and new machines), set up offsite backup systems, and contributed to system migrations
• Good hands on experience in building/managing Virtual Machines in Oracle and VMware virtual environments
• Experience in Windows Domain Controller, Active Directory configuration, users and group creation and management, folder permissions, network sharing, backup and maintenance
• Responsible for implementing and supporting Microsoft Office (2000, 2007, 2010) technologies
• Responsible for LAN/WAN administration and support
• Responsible upgraded and maintenance of server hardware components as per requirement.
• Worked with different hardware and software vendors to troubleshoot the hardware and software problems.
• Strong technical knowledge on Domain(Maintain and updating Domains CName and A Records in Godaddy.com, securepaynet.net, Net4in, Hostgator)
• Installed, configured and managed databases MS SQL 2000/2005 Server on Windows