Sr Operation Mgmt Specialist

Lenovo Inc.; Singapore; On-site; SGD 90,000 - 130,000; Full time

Job summary

Lenovo Singapore is seeking an experienced Windows Administrator to provide L2 support for on‑premises and AWS Windows Server environments. You will manage AD/ DNS/ GPO/ WSUS, perform patch cycles, and support AWS services such as EC2, S3, IAM, and CloudWatch.

The role requires PowerShell proficiency, CIS benchmarks exposure, ITIL practices, and solid incident triage skills. Join Lenovo's global technology powerhouse and help strengthen security, automation, and resilience across enterprise

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 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.

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.

Skills

Wintel administration

AWS experience

PowerShell scripting

Incident triage

Security & compliance awareness

Education

Diploma or Degree in IT/CS

Tools

AWS

IAM

WSUS/SCCM

Trend Micro Vision One

Qualys/Tenable

ITSM tools (ServiceNow/Jira)

Job description

We are Lenovo. We do what we say. We own what we do. We WOW our customers.
Lenovo is a US$83 billion revenue global technology powerhouse, ranked #153 in the Fortune Global 500, and serving millions of customers every day in 180 markets. Focused on a bold vision to deliver Smarter Technology for All, Lenovo has built on its success as the world’s largest PC company with a full-stack portfolio of AI-enabled, AI-ready, and AI-optimized devices (PCs, workstations, smartphones, tablets), infrastructure (server, storage, edge, high performance computing and software defined infrastructure), software, solutions, and services. Lenovo’s continued investment in world-changing innovation is building a more equitable, trustworthy, and smarter future for everyone, everywhere. Lenovo is listed on the Hong Kong stock exchange under Lenovo Group Limited (HKSE: 992) (ADR: LNVGY).
This transformation together with Lenovo’s world-changing innovation is building a more inclusive, trustworthy, and smarter future for everyone, everywhere. To find out more visit www.lenovo.com, and read about the latest news via our StoryHub.

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.

We are an Equal Opportunity Employer and do not discriminate against any employee or applicant for employment because of race, color, sex, age, religion, sexual orientation, gender identity, national origin, status as a veteran, and basis of disability or any federal, state, or local protected class.