AWS Cloud Engineer

Job Summary We are seeking a highly skilled and experienced Cloud Engineer lead (Level 3) to support cloud infrastructure for Commercial and Singapore Government-appointed agency operating across commercial cloud platforms. This role requires experiences managing multi-cloud environments predominantly on Amazon Web Services (AWS), with knowledge in Microsoft Azure and Google Cloud Platform (GCP). The ideal candidate will demonstrate strong Infrastructure-as-Code (IaC) capabilities, comprehensive OS lifecycle and patching operations, application deployment and troubleshooting expertise, and proactive operational leadership. This role emphasizes hands-on technical proficiency, security awareness, automation-driven practices, mentorship capabilities, and familiarity with strict uptime, compliance, and audit requirements in network separation environments. Key Responsibilities Multi-Cloud Infrastructure Operations • Operate and maintain cloud-native services in production across AWS, Microsoft Azure, and Google Cloud Platform: • Hands-on experience with cloud services including: Lambda, ECS/EKS, FSx, Glue, SES, GuardDuty, WAF, Shield Advanced, Security Hub, KMS, Secret Manager, SNS, SQS, EventBridge, API Gateway, EC2, S3, CloudWatch, Systems Manager, Azure Virtual Machines, Azure Kubernetes Service (AKS), Azure Functions, Azure Storage, Azure Monitor, Compute Engine, Google Kubernetes Engine (GKE), Cloud Functions, Cloud Storage, Cloud Monitoring • Monitor and troubleshoot infrastructure performance, uptime, and scalability across all platforms • Support production and staging environments with 24/7 reliability objectives • Able to participate in 24/7 shift rotation to provide round-the-clock operational support and assist a team of L2 engineers with hands-on troubleshooting of technical issues. Infrastructure as Code (IaC) • With working knowledge, able to maintain infrastructure deployment pipelines with 1 of the following: Terraform, Ansible, and/or Azure Resource Manager (ARM) templates • Troubleshoot environment drift and pipeline failures across multi-cloud environments. • Promote and be empowered to drive automation in cloud operations and continuous improvement initiatives. • Implement and maintain GitOps practices for infrastructure deployment Operating System Lifecycle & Patch Management • Lead OS patching operations across RHEL (v8 to v10) and Windows Server (2016→2025) using AWS Patch Manager, Azure Update Management, WSUS, SCCM, and YUM/DNF • Maintain basic knowledge of Linux administration with deep expertise in Wintel Operating System patching and management • Schedule, automate, and track patches across all environments • Coordinate patch approvals and ensure compliance with organizational policies • Execute monthly and quarterly patch cycles with minimal disruption • Perform post-patch validation and remediation activities Application Deployment & Troubleshooting • Deploy and troubleshoot applications across Windows and Linux operating systems • Support application teams with OS-level diagnostics and performance optimization • Collaborate with development teams to resolve infrastructure and OS-related application issues • Implement and maintain application monitoring and alerting frameworks Security & Compliance • Execute CIS (Center for Internet Security) security remediations across cloud platforms • Perform security hardening based on CIS Benchmarks and government security baselines • Conduct vulnerability remediation using tools such as Trend Micro Vision One, Qualys, Tenable, and AWS Config • Track SSL certificate renewals across all environments • Identify and remediate End-of-Life (EOL) components including OS versions and Lambda runtimes • Support compliance with government-level security, audit, and regulatory requirements Container & DevSecOps • Demonstrate knowledge of container technologies (Docker, Kubernetes, ECS, EKS, AKS, GKE) • Familiarity or insights of DevSecOps practices using SHIP-HATS (Secure Hybrid Integration Pipeline - Hive Agile Testing Solutions) under Singapore Government technology stack • Support CI/CD pipeline operations and integration with security scanning tools ITIL & Service Management • Adhere to ITIL processes including Incident, Problem, Change, and Request Management • Manage and resolve ITSM tickets via ServiceNow, Jira, or similar platforms • Drive ITSM ticket escalation between engineering teams and stakeholders • Coordinate change management activities and participate in Change Advisory Board (CAB) reviews with junior engineers. • Maintain service level agreements (SLAs) and operational level agreements (OLAs) Tool Integration & Observability • Integrate third-party tools including NGINX, monitoring dashboards, and observability stacks • Configure and maintain observability tools for metrics, logs, and alerts across multi-cloud environments • Implement log aggregation and analysis using CloudWatch, Azure Monitor, and GCP Cloud Logging Documentation & Knowledge Management • Create and maintain comprehensive infrastructure runbooks, system documentation, and change tracking logs and infrastructure architecture design of Application assigned. • Develop standard operating procedures (SOPs) and knowledge base articles • Ensure audit-readiness through meticulous documentation discipline • Maintain configuration management databases (CMDB) and asset inventories Leadership & Mentorship • Provide technical guidance and mentorship to Level 2 and junior engineers • Lead technical discussions and architecture reviews • Facilitate knowledge