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Full-time
On-site

Sr Operation Mgmt Specialist

Lenovo
National University of Singapore, National University of Singapore, Singapore 12 days ago
AI overview

Sr Operation Mgmt Specialist at Lenovo in National University of Singapore, National University of Singapore, Singapore focuses on Cloud Engineer – AWS (Windows & Linux) Role Overview We are seeking a Level 2 Cloud Engineer to. The engineer will work closely with cloud, network, and security teams in a regulated enterprise environment.

Cloud Engineer – AWS (Windows & Linux)

Role Overview

We are seeking a Level 2 Cloud Engineer to support and operate Windows and Linux workloads hosted on AWS, within a secure, multi‑account cloud environment covering UAT and Production.

This role focuses on day‑to‑day operational support, validation, troubleshooting, and remediation for OS‑level and cloud services, supporting AWS infrastructure initiatives involving secure ingress/egress, network firewalls, load balancers, and controlled connectivity. The engineer will work closely with cloud, network, and security teams in a regulated enterprise environment.

Key Responsibilities

  1. Windows & Linux OS Support (L2)

    Provide Level 2 operational support for:

    • Windows Server (2016 / 2019 / 2022)
    • Linux distributions (RHEL, Amazon Linux, Ubuntu)

    Perform OS‑level troubleshooting, service restarts, performance checks, and log analysis.

    Support core platform services:

    • Windows: AD, DNS, GPO, WSUS
    • Linux: systemd services, cron, filesystem, package management (yum/apt)

    Handle incidents, problems, and service requests via ITSM tools.

  2. AWS Cloud Operations Support

    Support workloads running on core AWS services:

    • EC2, EBS, S3
    • AWS Systems Manager (SSM) – Run Command, Patch Manager, Session Manager
    • Amazon CloudWatch – logs, metrics, alarms

    Assist with:

    • Instance provisioning and validation
    • Start/stop, resize, snapshot, and recovery activities
    • Support UAT and PROD operational readiness and BAU handover.
  3. Network, Ingress & Egress Support (Mandatory)

    Support AWS environments with:

    • Internet and Intranet-based ingress and egress traffic flows
    • VPCs, subnets, route tables, and security groups
    • Integration with web security and traffic management services such as AWS WAF

    Work with network and security teams to:

    • Validate end-to-end connectivity paths for Windows and Linux servers
    • Design and support Layer 4 and Layer 7 load balancing using AWS Network Load Balancer and AWS Application Load Balancer
    • Implement and manage API exposure and routing using Amazon API Gateway
    • Configure and support forward and reverse proxy solutions (e.g., NGINX)
    • Troubleshoot connectivity, DNS resolution, proxy routing, and firewall-related issues

    Support secure ingress and egress architecture by:

    • Implementing reverse proxy, forward proxy, and web application firewall (WAF) patterns
    • Ensuring secure access control, SSL/TLS termination, and traffic inspection

    Perform post-implementation testing and verification from the OS and network perspective to ensure end-to-end connectivity and application accessibility

  4. Security, Hardening & Compliance Support

    Support and remediate findings related to:

    • CIS hardening benchmarks (Windows & Linux)
    • Vulnerability scans and compliance checks

    Assist with:

    • IAM role usage and least‑privilege access at instance level
    • Endpoint protection / monitoring agents (EDR/XDR)

    Participate in audits, evidence collection, and compliance activities.

  5. Patch Management & Automation

    Perform OS patching for:

    • Windows (WSUS / SCCM / SSM Patch Manager)
    • Linux (yum / apt / SSM Patch Manager)

    Support automation and remediation using:

    • PowerShell (Windows)
    • Shell scripting (bash) (Linux)
    • AWS CLI

    Participate in scheduled maintenance windows and on‑call rotations.

  6. Documentation & Operational Readiness

    Create and maintain:

    • Runbooks
    • SOPs
    • Knowledge articles

    Support operational handover from project build to steady‑state support.

Required Skills & Experience

Core Experience

  • 5+ years of hands‑on OS support experience across Windows and/or Linux.
  • 2+ years supporting workloads on AWS.
  • Experience operating in enterprise or regulated environments.

Technical Skills (Must‑Have)

  • Windows Server administration (2016/2019/2022).
  • Linux administration (RHEL / Amazon Linux / Ubuntu).
  • AWS operational experience with:
    • EC2, EBS, S3
    • IAM (roles and instance profiles – operational usage)
    • Systems Manager (SSM)
    • CloudWatch
  • Understanding of:
    • VPC fundamentals
    • Security groups and basic routing
    • Load balancer integrations (NLB awareness)
  • Scripting skills:
    • PowerShell (Windows)
    • Bash / Shell scripting (Linux)

Preferred Skills & Certifications

  • AWS Certified SysOps Administrator – Associate
  • AWS Certified Solutions Architect – Associate
  • Microsoft Windows Server or Hybrid Administrator certification
  • Linux certifications (RHCSA or equivalent)
  • ITIL Foundation (v3/v4)

Soft Skills

  • Strong troubleshooting and incident triage capability.
  • Clear communicator able to work with cloud, network, and security teams.
  • Process‑driven and comfortable working with runbooks and controls.
  • Proactive, ownership mindset with willingness to upskill.
ContractFull-time
Work typeOn-site
Posted12 days ago
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