Sr Operation Mgmt Specialist

General Information

Req # WD00096676 Career area: Information Technology Country/Region: Singapore State: Central Singapore City: SINGAPORE Date: Thursday, June 11, 2026 Working time: Full-time Additional Locations: * Singapore - Central Singapore - Singapore * Singapore - Central Singapore - SINGAPORE

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Description and Requirements

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.

Additional Locations: * Singapore - Central Singapore - Singapore * Singapore - Central Singapore - SINGAPORE * Singapore * Singapore - Central Singapore * Singapore - Central Singapore - Singapore , * Singapore - Central Singapore - SINGAPORE