712 Systems Administrator jobs in Singapore

Responsibilities:

• Administrate and manage Linux and Unix servers
• Automate tasks using shell scripting or configuration management tools.
• Troubleshoot and maintain Unix/Linux-based applications in the servers.
• Develop, deploy, and support applications on RHEL, JBoss, WebLogic, MQ, and Kafka.
• Write and optimize SQL queries for Oracle/MySQL databases.
• Work with the technical teams in deploying, configuring, and optimizing RHEL, JBoss, WebLogic, MQ, and Kafka solutions.
• Drive automation and process improvements to enhance system efficiency and reduce manual intervention.
• Assist in system monitoring, logging, and automation.
• Provide support for infrastructure and middleware-related incidents.
• Collaborate with teams for project delivery and documentation.
• Ensure system security, patching, and compliance.
• Troubleshoot and resolve complex hardware, software, and networking issues.
• Maintain robust backup and disaster recovery procedures.
• Collaborate with cross-functional teams for deployments and upgrades.
• Document system configurations, procedures, and troubleshooting steps.
• Contribute to IT strategy, architecture, and infrastructure planning.
• Develop and maintain scripts to automate routine tasks and improve system efficiency.
• Document system configurations, procedures, and troubleshooting steps.
• Participate in on-call rotation and provide after-hours support as needed.
• Participate in a rotating shift schedule of 2 days, 2 nights, followed by 4 days off to provide 24x7 support, including weekends and holidays

Requirements:

• Bachelor’s degree in Computer Science, Information Technology, Engineering or related field.
• At least 4 years of experience in Linux system administration with proven experience as a Linux Engineer, with expertise in Red Hat Enterprise Linux (RHEL) and experience in technical delivery, infrastracture management, and middleware platforms.
• Red Hat certifications (e.g., RHCSA, RHCE) are highly desirable. Red Hat Certified Specialist is preferred.
• Strong knowledge of Linux system administration, networking, and security.
• Proficiency in scripting languages such as Bash, Python, or Perl.
• Familiarity with configuration management tools (e.g., Ansible, Puppet).
• Experience in JBoss, WebLogic, MQ, and Kafka.
• Strong knowledge of Unix shell scripting and SQL (Oracle/MySQL).
• VMware configurations and administration.
• Strong stakeholder management and communication skills.
• Strong analytical, and problem-solving skills.
• Excellent communication and documentation abilities.
• Detail-oriented with a proactive approach to system reliability.
• Must be able to work on rotating shift schedule of 2 days, 2 nights, followed by 4 days off to provide 24x7 support, including weekends and holiday.

Responsibilities:

• Administrate and manage Linux and Unix servers
• Automate tasks using shell scripting or configuration management tools.
• Troubleshoot and maintain Unix/Linux-based applications in the servers.
• Develop, deploy, and support applications on RHEL, JBoss, WebLogic, MQ, and Kafka.
• Write and optimize SQL queries for Oracle/MySQL databases.
• Work with the technical teams in deploying, configuring, and optimizing RHEL, JBoss, WebLogic, MQ, and Kafka solutions.
• Drive automation and process improvements to enhance system efficiency and reduce manual intervention.
• Assist in system monitoring, logging, and automation.
• Provide support for infrastructure and middleware-related incidents.
• Collaborate with teams for project delivery and documentation.
• Ensure system security, patching, and compliance.
• Troubleshoot and resolve complex hardware, software, and networking issues.
• Maintain robust backup and disaster recovery procedures.
• Collaborate with cross-functional teams for deployments and upgrades.
• Document system configurations, procedures, and troubleshooting steps.
• Contribute to IT strategy, architecture, and infrastructure planning.
• Develop and maintain scripts to automate routine tasks and improve system efficiency.
• Document system configurations, procedures, and troubleshooting steps.
• Participate in on-call rotation and provide after-hours support as needed.
• Participate in a rotating shift schedule of 2 days, 2 nights, followed by 4 days off to provide 24x7 support, including weekends and holidays

Requirements:

• Bachelor's degree in Computer Science, Information Technology, Engineering or related field.
• At least 4 years of experience in Linux system administration with proven experience as a Linux Engineer, with expertise in Red Hat Enterprise Linux (RHEL) and experience in technical delivery, infrastracture management, and middleware platforms.
• Red Hat certifications (e.g., RHCSA, RHCE) are highly desirable. Red Hat Certified Specialist is preferred.
• Strong knowledge of Linux system administration, networking, and security.
• Proficiency in scripting languages such as Bash, Python, or Perl.
• Familiarity with configuration management tools (e.g., Ansible, Puppet).
• Experience in JBoss, WebLogic, MQ, and Kafka.
• Strong knowledge of Unix shell scripting and SQL (Oracle/MySQL).
• VMware configurations and administration.
• Strong stakeholder management and communication skills.
• Strong analytical, and problem-solving skills.
• Excellent communication and documentation abilities.
• Detail-oriented with a proactive approach to system reliability.
• Must be able to work on rotating shift schedule of 2 days, 2 nights, followed by 4 days off to provide 24x7 support, including weekends and holiday.

ROLE SUMMARY

The Systems Administrator plays a critical role in maintaining and securing the IT infrastructure that supports Firmus’ business operations across regional offices. Reporting directly to the Chief Technology Officer (CTO), this position is responsible for the day-to-day administration of servers, network systems, endpoints, cloud services, and enterprise platforms. The role requires a strong hands-on background in system administration, hybrid Active Directory environments, cybersecurity enforcement, and end-user support. The Systems Administrator also contributes to strategic technology initiatives, including infrastructure modernisation, security posture improvements, and operational efficiency projects. This position demands a proactive, detail-oriented individual with the ability to manage complex systems, provide high-quality support, and collaborate effectively across departments and with external vendors.

KEY RESPONSIBILITIES

• Administer and maintain Corporate IT infrastructure across regional offices (e.g. Singapore and Australia), including Windows/Linux servers, virtual instances (Hyper-V, VMware, Proxmox), network equipment, and storage systems.
• Deploy, configure, and manage enterprise platforms such as Microsoft 365, Intune, Azure AD, and Hybrid Active Directory; ensure synchronisation, group policies, and role-based access control are consistently enforced.
• Oversee and support security and access systems, including Milestone VMS servers and Inner Range access control infrastructure.
• Implement and enforce cybersecurity solutions using Palo Alto Prisma Access, Cortex XDR, MFA, and vulnerability management practices.
• Support system backup operations and disaster recovery using Veeam, including scheduled testing and verification.
• IT onboarding and offboarding process for staff, including account provisioning/deactivation, device issuances/returns, and access rights review.
• Administer collaboration and communication platforms, including managing user access, integration, and policy controls in Slack.
• Maintain an accurate IT asset inventory and oversee software licensing compliance (e.g., Microsoft, Adobe, Autodesk).
• Enforce endpoint compliance, application controls, and security policies using Microsoft Intune across Windows, macOS, and mobile devices.
• Provide end-user support through the IT Service Desk using Jira Service Management (JSM), ensuring efficient resolution of service tickets and escalations.
• Monitor infrastructure health using observability and centralised logging tools, including experience working with SIEM platforms to detect and respond to threats.
• Lead and contribute to IT improvement projects, driving alignment with industry best practices and organisational goals.
• Maintain comprehensive technical documentation, including system configurations, SOPs, and security audit trails.
• Collaborate with cross-functional teams and external vendors to deliver secure and efficient IT services across the organisation.

SKILLS AND EXPERIENCE

• 3 to 5 years of experience in a Systems Administrator role or similar.
• Bachelor’s Degree in Computer Science.
• Strong foundation in IT operations.
• Proven experience managing enterprise IT infrastructure, including servers, endpoints, network devices, and virtualisation platforms (Hyper-V, VMware, Proxmox).
• Skilled in supporting hybrid environments with Microsoft 365, Azure AD, and Intune for cloud identity and endpoint management.
• Understanding of corporate network architecture, WAN setup, and multi-site connectivity.
• Practical experience maintaining high system availability, performance tuning, and proactive monitoring.
• Proficient in implementing and maintaining security tools such as Palo Alto Prisma Access, Cortex XDR, and MFA enforcement.
• Experienced with backup and disaster recovery operations using Veeam.
• Strong problem-solving abilities with a track record of resolving complex technical issues efficiently.
• Familiar with Jira Service Management (JSM0 for structured IT support and service desk operations.
• Effective communicator with strong interpersonal skills, capable of working independently or as part of a cross-functional team.
• Committed to delivering reliable and responsive IT services to end-users and business units.
• Experience with vendor coordination is an added advantage.
• Willingness to travel domestically and internationally as required.

LOCATION

Singapore

EMPLOYMENT BASIS

Full-Time

At Firmus, we are committed to building a diverse and inclusive workplace. We encourage applications from candidates of all backgrounds who are passionate about creating a more sustainable future through innovative engineering solutions.

Join us in our mission to revolutionise the AI industry through sustainable practices and cutting-edge engineering. Apply now to be part of shaping the future of sustainable AI infrastructure.

Responsibilities:

• Administrate and manage Linux and Unix servers
• Automate tasks using shell scripting or configuration management tools.
• Troubleshoot and maintain Unix/Linux-based applications in the servers.
• Develop, deploy, and support applications on RHEL, JBoss, WebLogic, MQ, and Kafka.
• Write and optimize SQL queries for Oracle/MySQL databases.
• Work with the technical teams in deploying, configuring, and optimizing RHEL, JBoss, WebLogic, MQ, and Kafka solutions.
• Drive automation and process improvements to enhance system efficiency and reduce manual intervention.
• Assist in system monitoring, logging, and automation.
• Provide support for infrastructure and middleware-related incidents.
• Collaborate with teams for project delivery and documentation.
• Ensure system security, patching, and compliance.
• Troubleshoot and resolve complex hardware, software, and networking issues.
• Maintain robust backup and disaster recovery procedures.
• Collaborate with cross-functional teams for deployments and upgrades.
• Document system configurations, procedures, and troubleshooting steps.
• Contribute to IT strategy, architecture, and infrastructure planning.
• Develop and maintain scripts to automate routine tasks and improve system efficiency.
• Document system configurations, procedures, and troubleshooting steps.
• Participate in on-call rotation and provide after-hours support as needed.
• Participate in a rotating shift schedule of 2 days, 2 nights, followed by 4 days off to provide 24x7 support, including weekends and holidays

Requirements:

• Bachelor’s degree in Computer Science, Information Technology, Engineering or related field.
• At least 4 years of experience in Linux system administration with proven experience as a Linux Engineer, with expertise in Red Hat Enterprise Linux (RHEL) and experience in technical delivery, infrastracture management, and middleware platforms.
• Red Hat certifications (e.g., RHCSA, RHCE) are highly desirable. Red Hat Certified Specialist is preferred.
• Strong knowledge of Linux system administration, networking, and security.
• Proficiency in scripting languages such as Bash, Python, or Perl.
• Familiarity with configuration management tools (e.g., Ansible, Puppet).
• Experience in JBoss, WebLogic, MQ, and Kafka.
• Strong knowledge of Unix shell scripting and SQL (Oracle/MySQL).
• VMware configurations and administration.
• Strong stakeholder management and communication skills.
• Strong analytical, and problem-solving skills.
• Excellent communication and documentation abilities.
• Detail-oriented with a proactive approach to system reliability.
• Must be able to work on rotating shift schedule of 2 days, 2 nights, followed by 4 days off to provide 24x7 support, including weekends and holiday.

Responsibilities:

• Lead and guide technical teams in deploying, configuring, and optimizing RHEL, JBoss, WebLogic, MQ, and Kafka solutions.
• Develop, deploy, and support applications on RHEL, JBoss, WebLogic, MQ, and Kafka.
• Write and optimize SQL queries for Oracle/MySQL databases.
• Drive automation and process improvements to enhance system efficiency and reduce manual intervention.
• Administrate and manage Linux and Unix servers. Troubleshoot and maintain Unix/Linux-based applications in the servers.
• Assist in system monitoring, logging, and automation.
• Provide support for infrastructure and middleware-related incidents.
• Collaborate with teams for project delivery and documentation.
• Ensure system security, patching, and compliance.
• Troubleshoot and resolve complex hardware, software, and networking issues.
• Automate tasks using shell scripting or configuration management tools.
• Maintain robust backup and disaster recovery procedures.
• Collaborate with cross-functional teams for deployments and upgrades.
• Document system configurations, procedures, and troubleshooting steps.
• Contribute to IT strategy, architecture, and infrastructure planning.
• Participate in on-call rotation and provide after-hours support as needed.
• Participate in a rotating shift schedule of 2 days, 2 nights, followed by 4 days off to provide 24x7 support, including weekends and holidays

Requirements:

• Bachelor’s degree in Computer Science, Information Technology, Engineering or related field.
• At least 6 years of experience in Linux system administration with proven ability to manage a team and projects effectively, with expertise in Red Hat Enterprise Linux (RHEL) and experience in technical delivery, infrastructure management, and middleware platforms.
• Red Hat certifications (e.g. Red Hat Certified Specialist, RHCSA, RHCE) is preferred.
• Strong knowledge of Linux system design and architecture, networking, and security. Experience in troubleshooting and resolving database integrity issues, performance issues, blocking and deadlocking issues, replication issues, log shipping issues, connectivity issues, security issues etc. Ability to detect and troubleshoot SQL Server related CPU, memory, I/O, disk space and other resource contention.
• Proficiency in UNIX shell scripting and other scripting languages such as Bash, Python, or Perl.
• Familiarity with configuration management tools (e.g., Ansible, Puppet).
• Experience in JBoss, WebLogic, MQ, and Kafka.
• VMware configurations and administration.
• Knowledge of cloud platforms (e.g., AWS, Azure) and containerization (e.g., Docker, Kubernetes).
• Strong stakeholder management and communication skills.
• Strong leadership, analytical, and problem-solving skills.
• Excellent communication and documentation abilities.
• Detail-oriented with a proactive approach to system reliability
• Must be able to work on rotating shift schedule of 2 days, 2 nights, followed by 4 days off to provide 24x7 support, including weekends and holiday.

• Administer and maintain heterogeneous OS environments including Solaris and Linux across production and non-production zones.
• Plan and execute upgrades, patches, and platform enhancements across infrastructure components.
• Enforce security baselines, OS-level hardening, and deploy vendor/OS-specific vulnerability fixes.
• Track end-of-life status of platform components and proactively manage refresh cycles.
• Oversee renewal schedules for expiring credentials, passwords, and server-side certificates.
• Implement and maintain backup policies, system snapshots, and database archival processes to support data protection and recovery.
• Design and test DR strategies for server infrastructure; conduct routine failover and recovery simulations to validate readiness.
• Coordinate UAT activities for application teams and maintain integrity of the UAT environments.
• Maintain infrastructure documentation including architecture diagrams, admin manuals, and recovery procedures.
• Provide deep-dive (L3) technical troubleshooting support for complex platform issues and escalations.

• Deliver Tier 2 response and resolution for OS-related issues within agreed SLA timelines.
• Perform in-depth analysis of recurring faults and design countermeasures to improve resilience.

• Manage deployment windows for patching and upgrades under the established change governance framework.
• Build and package deployment artefacts using internal automation tools or scripts.

• Maintain a centralised repository of infrastructure assets and configuration profiles for servers and middleware.
• Ensure audit readiness of system configurations and change logs.

• Track server utilisation metrics and forecast capacity needs in line with expected load trends.
• Conduct performance diagnostics and fine-tune system parameters to meet platform SLAs.

• Create and refine IT operations workflows aligned to corporate governance, audit, and security standards.

• Contribute to project rollouts by provisioning, configuring, and validating system infrastructure.
• Lead infrastructure enhancement workstreams in accordance with organisational best practices.

• Maintain system documentation, runbooks, operational standards, and configuration histories for continuity.

• A Bachelor's degree in Computer Science, Information Technology, or related discipline.
• At least 8 years of experience in Unix/Linux system administration, preferably in high-security or regulated environments.
• Practical expertise in managing SAN-connected systems and integrating storage into Unix/Linux workflows.
• Solid experience with OS patching, vulnerability mitigation, and compliance alignment.
• Familiarity with enterprise-class backup, monitoring, and system health solutions.
• Comfortable with shell scripting and automation in Unix/Linux environments.
• Understanding of database support and data center operating procedures is advantageous.
• Willingness to participate in a 24/7 rotational support roster and respond to after-hours change events.
• Proven ability to communicate complex issues clearly across business and technical teams.
• Team player with a hands-on mindset, high ownership, and a problem-solving attitude.
• Able to handle multiple priorities and operate effectively under pressure.
• Certifications in Unix/Linux system administration (e.g., RHCSA, RHCE, Solaris Admin) required.
• Cloud administration certifications (AWS, Azure, or similar) are highly desirable.

Reg. No. R1878306

EA License no.: 16S8066

• Administer and troubleshoot Windows servers, including installation and system hardening tasks.
• Manage Active Directory, DNS, DHCP, and ensure high availability of systems.
• Configure and support Microsoft clusters and RAID storage for optimal performance.
• Work with virtualization platforms like VMware and cloud environments such as AWS.
• Oversee file system quotas, FTP/SFTP configurations, and storage space management.

• 5+ years' experience in Windows system administration or related roles.
• Bachelor's degree in Computer Engineering, Science, or a relevant Computer Diploma.
• Certifications like MCSE or VMware preferred for enhanced skills validation.
• Strong knowledge of cloud operations, particularly AWS deployment and migration.
• Excellent communication skills and a customer-focused approach to problem solving.

• Provide Level 2 support for Windows Server environments (2016/2019/2022) in both cloud and hybrid infrastructures.
• Perform patching and vulnerability management for Windows and VMware environments.
• Install, configure, and manage VMware ESXi, vCenter, and perform environment hardening.
• Troubleshoot Windows OS and VMware-related issues effectively.
• Administer Azure services, ensuring scalability, performance, security, and availability.
• Conduct regular system health checks, performance tuning, and capacity planning.
• Remediate security findings from Web and Infrastructure Penetration Tests and Vulnerability Management System (VMS) reports.
• Manage IIS configurations and provide support for Microsoft Active Directory.
• Maintain SLAs by monitoring systems, updating documentation, and generating regular reports.
• Support backup and recovery operations using enterprise-level tools.
• Participate in ITIL-based incident, problem, and change management processes.
• Document standard operating procedures, configurations, and troubleshooting steps.
• Citrix administration knowledge is considered an added advantage.

Job Title: Cloud Systems Administrator

The ideal candidate will have hands-on experience with virtualization platforms, cloud architecture, and VMware. We are seeking a skilled systems administrator to manage and maintain our virtualized environment.

Key Responsibilities:

• Monitor VM health and performance in the new alternate hypervisor environment.
• Familiarity with virtualization technology such as vMotion, DRS, HA, and VM snapshots.
• Experience in supporting VM migration and firmware patching.
• Diagnose issues and resolve any performance or compatibility issues that arise post-migration.
• Ability to work with stakeholders for collaboration and support.
• Resolve migration failures and handle any errors or failures that may have occurred during the migration process.

Requirements:

• Degree in Computer Engineering/Information Technology/Computer Science.
• 10 years of related experience and knowledge in DC environments, with some time spent on VMware and cloud architecture.
• Willingness to work night hours during project migrations.