Sr Operation Mgmt Specialist

Lenovo PCCW Solutions; Singapore; On-site; SGD 70,000 - 110,000; Full time

Job summary

Lenovo PCCW Solutions is seeking an experienced Windows and AWS administrator to provide L2 support for Windows Server on‑prem and in the cloud. You will manage AD, DNS, DHCP, GPO, WSUS, and clustering, while handling incidents via ITSM tools and coordinating patch cycles.

The role requires 5+ years in Wintel, 2+ years AWS Windows workloads, and strong scripting with PowerShell. Knowledge of CIS benchmarking, IAM, CloudWatch, and AWS Systems Manager is essential. ITIL experience is a plus.

Qualifications

• Diploma or Degree in Information Technology, Computer Science, or related discipline.

Responsibilities

• Provide L2 operational support for Windows Server in on-prem and AWS.
• Manage AD, DNS, DHCP, GPO, WSUS, and Windows clustering.
• Resolve incidents via ITSM platforms (ServiceNow, Jira).
• Perform patch management using WSUS/SCCM and AWS Systems Manager.
• Support AWS services: EC2, S3, IAM, EBS, CloudWatch, SSM.
• Implement IAM least privilege and reviews using IAM Access Analyzer.
• Remediate CIS Benchmarks findings and compliance scans.
• Vulnerability Management remediation with InfoSec collaboration.
• Work with EDR/XDR platforms for threat detection and remediation.
• Assist in automation scripting via PowerShell, AWS CLI, and SSM Documents.
• Create technical docs and SOPs.
• Participate in audits, patch windows, and DR testing.
• On-call support and 24x7 shift rotations.

Skills

Wintel administration

AWS for Windows workloads

PowerShell scripting

Education

Diploma or Degree in IT / Computer Science or related

Tools

AWS Systems Manager

AWS Config

CloudWatch

IAM

Trend Micro Vision One

Qualys/Tenable

WSUS/SCCM

SCCM

Job description

Key Responsibilities

• Provide L2 operational support for Windows Server 2012/2016/2019/2022 in both on-prem and AWS environments.
• Manage and support AD, DNS, DHCP, GPO, WSUS, and Windows clustering.
• Resolve incidents and service requests related to Wintel systems via ITSM platforms (ServiceNow, Jira, etc.).
• Perform patch management and coordinate monthly/quarterly patch cycles using WSUS/SCCM/AWS Systems Manager.
• Support AWS services: EC2, S3, IAM, EBS, CloudWatch, Systems Manager (SSM).
• Implement and review IAM permissions using IAM Access Analyzer and least privilege model.
• Execute and remediate findings from CIS Hardening baselines and compliance scans.
• Carry out Vulnerability Management System (VMS) remediation and Cloudscape recommendations in collaboration with InfoSec teams.
• Work with Trend Micro Vision One (or similar EDR/XDR platforms) for threat detection and remediation.
• Assist in automation scripting and remediation via PowerShell, AWS CLI, and SSM Documents.
• Create and maintain technical documentation, knowledge articles, and standard operating procedures.
• Participate in audits, patch windows, and disaster recovery testing.
• Perform on-call support and participate in 24x7 shift rotations when required.

Required Qualifications

• Diploma or Degree in Information Technology, Computer Science, or related discipline.
• 5+ years of hands‑on Wintel administration and support.
• 2+ years of hands‑on AWS experience supporting Windows workloads.
• Experience with IAM roles, security groups, S3 access policies, and CloudWatch alarms/logs.
• Exposure to security and hardening frameworks (e.g., CIS Benchmarks, SCAP).
• Familiarity with tools like Trend Micro Vision One, Qualys/Tenable, AWS Config, and AWS Systems Manager.
• PowerShell scripting proficiency for routine tasks and automation.
• Knowledge of backup and recovery strategies for Windows servers in cloud.
• Understanding of ITIL practices and experience using ticketing systems.

Preferred Certifications

• AWS Certified SysOps Administrator - Associate
• AWS Certified Solutions Architect - Associate
• Microsoft Certified: Windows Server Hybrid Administrator Associate
• ITIL v3/v4 Foundation

Soft Skills

• Strong analytical and incident triage skills under pressure.
• Ability to handle and communicate with demanding customers tactfully and professionally.
• Ownership mindset with proactive problem‑solving ability.
• Good written and verbal communication; capable of producing clear documentation.
• Team player with collaborative work ethic and a willingness to learn new technologies.