Sr Subject Matter Expert (Support&Ops)
HCLTech
Singapore, Singapore
Job Summary
Position: Unix L2/L3 Support Engineer (Linux, Solaris & AIX)
Experience: L2 : 6+ Years, L3 10+ Years
Support Coverage: 24x7 Shift Support
Location: Singapore
Job Summary
We are seeking an experienced Unix L2/L3 Support Engineer with strong expertise in Linux (RedHat), Solaris, and AIX administration to provide 24x7 operational support for enterprise datacenter and cloud environments. The role involves incident management, problem determination, system administration, automation, infrastructure support, performance optimization, patch management, and ensuring high availability of critical business services.
The candidate should possess strong troubleshooting skills across Unix platforms, cloud technologies, automation tools, clustering solutions, and infrastructure management frameworks.
Key Responsibilities
Unix/Linux/Solaris/AIX Administration
Provide L2 administration and operational support for Linux, Solaris, and AIX servers across Data Center and Cloud environments.
Perform installation, configuration, administration, patching, upgrades, migration, and lifecycle management of Unix/Linux platforms.
Manage virtualization technologies including
Solaris Zones and LDOMs
AIX LPARs and VIOS
Perform OS hardening, capacity management, performance tuning, and system optimization.
Troubleshoot server, operating system, hardware, storage, and application-related issues.
Handle break-fix activities and service restoration within agreed SLAs.
Create and maintain environments for batch processing and associated reporting systems.
Infrastructure & Platform Management
Manage Red Hat Satellite for patching, provisioning, and lifecycle management.
Administer Centrify, IBM GPFS, Puppet, and Ansible environments.
Support Docker and Kubernetes platforms.
Manage AWS and Azure virtual machine deployments and administration.
Support storage integration, clustering, partitioning, and virtualization technologies.
Provide support for HA and Cluster technologies.
Automation & DevOps
Hands-on experience in Ansible and/or Terraform for infrastructure provisioning, configuration management, and automation.
Strong scripting skills using Shell Scripting, Python to automate operational and administrative tasks.
Develop, maintain, and enhance automation workflows, reusable playbooks, and Infrastructure-as-Code (IaC) solutions.
Drive continuous improvement initiatives to reduce manual effort and improve operational efficiency.
Automate patching, monitoring, reporting, server provisioning, and compliance-related activities.
Incident, Problem & Change Management
Monitor infrastructure health and proactively address issues.
Participate in incident, problem, and change management processes.
Perform root cause analysis (RCA) and provide corrective and preventive actions.
Collaborate with application, network, cloud, storage, and security teams during major incidents.
Support system integration and production rollout activities.
24x7 Operational Support
Provide 24x7 operational support, monitoring, incident management, and troubleshooting to ensure service availability and business continuity.
Participate in shift-based support , on-call rotations, weekend support, and major incident management.
Ensure compliance with SLA, OLA, and operational standards.
Support planned maintenance activities and emergency changes whenever required.
Skill Requirements
Operating Systems
Red Hat Enterprise Linux (RHEL)
Sun Solaris
IBM AIX
Unix Technologies
Solaris LDOMs
AIX LPARs
AIX VIOS
GPFS
Centrify
Configuration Management & Automation
Ansible
Terraform
Puppet
Shell Scripting
Python
Infrastructure as Code (IaC)
Cloud Platforms
AWS
EC2
S3
ELB
Auto Scaling
Microsoft Azure
GCP
Openshift
VM Deployment and Administration
Containerization & Orchestration
Docker
Kubernetes
Monitoring & Operations
Performance Monitoring
Capacity Management
Patch Management
Incident Management
Problem Management
Change Management
Root Cause Analysis
High Availability & Clustering
High Availability (HA) Solutions
OS Clustering Technologies
Other Requirements
Required Qualifications
Bachelor's Degree in Engineering, Computer Science, Information Technology, or related field.
Minimum 6+ years of experience in Unix/Linux system administration and support.
Strong troubleshooting experience in Linux, Solaris, and AIX environments.
Experience supporting enterprise-scale infrastructure in data center and cloud environments.
Excellent verbal and written communication skills.
Strong analytical, problem-solving, and customer management skills.
Preferred Certifications
RHCSA – Red Hat Certified System Administrator
RHCE – Red Hat Certified Engineer
Solaris Certified Administrator
Docker Certified Associate
AWS SysOps Administrator
AWS Solutions Architect
Microsoft Azure Administrator
Microsoft Azure Solutions Architect
Desired Competencies
Strong customer focus and stakeholder management skills.
Ability to work independently in a 24x7 support environment.
Experience in large enterprise infrastructure operations.
Knowledge of ITIL processes and service management practices.
Continuous improvement mindset with focus on automation and operational excellence.
#body.unify div.unify-button-container .unify-apply-now: focus, #body.unify div.unify-button-container .unify-apply-#body.unify div.unify-button-container .unify-apply-now: focus, #body.unify div.unify-button-container .unify-apply-
8000 - 15000 SGD
...ServiceNow Subject Matter Expert (SME) – Contract Management Key Responsibilities Lead the design, configuration, and customisation of... ...module. Enhance existing workflows and approval processes to support complex multi-level approval requirements beyond standard...- ...: Due to a number of recent contract wins, Interocean is seeking experienced Project Engineers and Subject Matter Experts (SMEs) across multiple disciplines to support upcoming MODU (Mobile Offshore Drilling Unit) shipyard projects. We are currently hiring for both short...
10000 - 12500 SGD
...and performance of infrastructure aligned to SLA Manage Windows Server environments, including Hyper-V and Failover Clustering Support VMware platforms (vSphere / ESXi) and hybrid cloud environments (AWS / GCP) Oversee enterprise hardware and hyper-converged platforms...- ...Scientist, Advanced Cryo Workflows will play a critical role in supporting the adoption and successful implementation of advanced cryo-electron... ...research institutes to enable scientific success. ~ Provide expert guidance on workflow optimization, experimental design, and best...Remote job
2200 - 2300 SGD
...and drinks on the side. Our Guest Service Experts take the initiative and deliver a wide range... ...feel like part of the experience. No matter what position you are in, there are a few... ...the property. Working with Others # Support all co-workers and treat them with dignity...4500 - 5500 SGD
...We are looking for an Operations & Administrative Executive to provide administrative and operational support across KYC documentation, invoice processing, financial reporting, and general office administration. The role requires strong attention to detail, effective coordination...9100 - 14800 SGD
...node technology ramp-up and transfer, with a strong emphasis logic/RF devices. The primary responsibility of this role is to lead and support new technology introduction (NTI) and process transfers involving logic/RF technologies, ensuring manufacturability, yield, and...2200 - 3200 SGD
Responsibilities Enter data accurately and efficiently to maintain up-to-date records Provide responsive customer service by addressing inquiries and resolving issues Coordinate daily operations to ensure smooth workflow and timely task completion ,,,,,,,,,,,,,,...- Ops Support Executive, EUC & Svc Desk Date: 3 Aug 2026 Location:Singapore, Singapore Company: Singtel Group NCS is a leading technology services firm that operates across the Asia Pacific region in over 20 cities, providing consulting, digital services...
5000 - 7000 SGD
...Manage audit documentation including KMP confirmations, minutes and resolution listings, and share capital confirmations • Support investor relations matters, corporate actions, audit matters, and events • Manage office lease matters including stamping, lease agreements, and...4500 - 5300 SGD
...one mentorship provided ✈️ Travel Opportunities: Melbourne, Taiwan, Malaysia, Hong Kong & Indonesia Fast Career Progression: Promotions based on performance and leadership—not seniority Supportive Team Culture: Grow alongside ambitious, like-minded teammates...3200 - 4000 SGD
...Retail & E-Commerce Executive to lead our retail operations while supporting our online business activities. This role is ideal for someone... ...executing events and marketing campaigns. Coordinate online-related matters to support business operations. Requirements Confident in...4000 - 4500 SGD
...Responsibilities Financial Operations & Month-End Closing Support month-end closing activities by compiling, validating, and maintaining... ....****@*****.*** (R1434374), stating the position as the subject title in the email. Jireli Gem Mejia Cabria | EA License No....5000 - 10000 SGD
...Role Overview We are seeking dynamic and committed candidates to support the Head of Department in driving excellence in teaching and learning, curriculum innovation, and student development. The successful candidate will strengthen pedagogical practices, develop teachers...6000 - 12000 SGD
...This job is responsible for supporting users in an elevated desktop support role. Key responsibilities include performing complex technical problem resolution of hardware and software issues remotely, by telephone, and/or on location for end users. Job expectations include...4000 - 10000 SGD
...contributors impacting lives locally and globally, then we want you! Subject Head, Mathematics Guided by the Head of Department,... ...parents and community partners to enhance school-wide programs and support the holistic outcomes of the IB learner profile. Teacher,...4000 - 5000 SGD
...transformation initiatives that deliver significant Impact. Facilitation: Expertly facilitate workshops, brainstorming sessions, and stakeholder... ...with enterprise architecture standards. Development Support: Provide continuous support to the development team throughout...4800 - 8250 SGD
...updates and contributing to decisions on matters related to the curriculum and school policies... ...and coordinate the curriculum for the subject(s) and ensure that the skills and content... ...staff teaching the subject(s) and all support staff under his/her charge. # Coordinate...1500 - 3200 SGD
...link below to complete and submit the application form. SUBJECT TEACHER JOB QUALIFICATIONS: Degree in Education from a university... ...Homeroom Teacher or Co-Homeroom Teacher · ECA/CCA and student support · Any other duties as assigned by the principal and management...15000 - 20000 SGD
...initiatives to measurable business outcomes (productivity, speed to insight, revenue impact) Enable field teams and serve as a subject matter expert on modern analytics architectures What we look for: ~ Enterprise sales experience in BI, analytics, data platforms, or AI...2500 - 3200 SGD
...seeking a friendly, organised, and patient-focusedClinic Assistant to support the day-to-day operations of our clinic. This role combines... ...billing, claims processing, and payment-related administrative matters. Manage filing systems and ensure documentation is organised...2500 - 5000 SGD
...Role information - Team: Customer Ops - Role: Customer Ops Executive - Location... ...collaborates cross-functionally, and builds support and alignment around goals and objectives.... ...Care about every single detail. Every detail matters when you want to achieve greatness. - Be...12000 - 20000 SGD
...the people who keep the cloud running. We support all AWS data centers and all of the servers... ..., supply chain specialists, security experts, operations managers, and other vital roles... ...highly analytical, driven, and experienced Mfg Ops Engineer to manage contract manufacturing...2800 - 3500 SGD
...disposition Childcare teacher who are able to teach primary school Chinese are welcome to apply Able to teach another primary school subject will be an added advantage. Immediate hiring available for full-time/part-time 工作要求： 任何学科的理工学院文凭或更高学历，至少有2年的小学生教学经验。 能教小学中文...3500 - 5500 SGD
...deliver a strong regional market service in terms of technical product support, new product specification and product systemization in proximity. RESPONSIBILITIES: To be the Subject Matter Expert for Power Reliability products and solutions not limited to the main product...- ...to help shape what's next. The work is challenging – but it matters. You'll find a place where you can be yourself, prioritize your... ...and delivery of complex analytical initiatives — acting as a subject-matter expert, managing ambiguity, and ensuring data-driven solutions are...
4000 - 6000 SGD
...nurturing & educating our future generation. Role Overview As the Subject Head for Phonics & Reading at Mind Stretcher, you will take... ...in phonics and reading instruction. Lead, guide, and support a team of teachers in the effective delivery of the programme....3000 - 4500 SGD
...Make a difference while gaining valuable skills ! Join our charity fundraising team and help raise awareness and support for meaningful community causes through on-ground activities and public engagement. At Altius Org, we specialises in connecting Clients & Brands with...2800 - 4500 SGD
...facility management, contractors, and building users for operational matters. - Monitor and manage the performance of on-site teams (... ...of incidents, maintenance activities, and shift handovers. - Support the implementation of operational policies, procedures, and improvement...- ...now. Role Summary: The Consolidation Lead Expert is responsible for leading the end-to-end group consolidation... ..., and compliant consolidated financial information, supports complex technical accounting matters, and drives continuous improvement, standardization,...
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Sr Subject Matter Expert (Support&Ops). Be the first to apply!
