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A Decade of Enterprise Infrastructure Delivery

Whil Cayangyang
Author
Whil Cayangyang
Turning bare-metal servers and Kubernetes clusters into resilient, automated, zero-trust infrastructure — where every layer is intentional, observable, and owned.
A decade of enterprise infrastructure delivery — from field engineering to regional cloud and security leadership — built on a foundation of precision, governance, and outcomes that last.

Technical Excellence
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The disciplines below represent areas where I have delivered real outcomes in production environments — not certifications on paper, but capabilities applied under operational pressure across multi-site, multi-country enterprise infrastructure.

AWS
Terraform
GitHub Actions
Cybersecurity
Networking
Linux
Kubernetes
GitOps
CapabilityDepthHow I Apply It
Amazon AWSAdvancedArchitecting multi-account environments with resilient networking, least-privilege IAM, and cost-managed operations at scale.
ContainerizationAdvancedDefining production container standards, securing image delivery pipelines, and optimizing runtime performance for reliable workloads.
LinuxAdvancedOperating hardened Linux systems for high-availability workloads, performance tuning under load, and structured incident recovery.
Observability & MonitoringAdvancedBuilding metrics, log, and trace pipelines with proactive alerting, SLO alignment, and root-cause analysis capability.
CapabilityDepthHow I Apply It
TerraformAdvancedDelivering modular, policy-controlled Infrastructure as Code with remote state strategy and safe, auditable change promotion.
GitHub ActionsAdvancedDesigning enterprise CI/CD pipelines with reusable workflows, approval gates, and release governance built in from the start.
AnsibleAdvancedAutomating baseline configuration, patch orchestration, and compliance drift remediation across large fleet environments.
Bash ScriptingExpertBuilding robust automation for provisioning, operational diagnostics, and repeatable runbooks that reduce human error.
CapabilityDepthHow I Apply It
NetworkingExpertDesigning segmented, redundant network architectures with structured routing, firewall policy enforcement, and secure remote access.
CybersecurityAdvancedOperating defense-in-depth controls with SIEM telemetry, detection engineering, and documented incident response processes.
CloudflareAdvancedSecuring edge delivery with Zero Trust access policies, WAF rule management, DNS governance, and performance optimization.
Threat Modeling & HardeningAdvancedLeading threat modeling sessions and platform hardening programs to reduce attack surface and enforce measurable secure baselines.
CapabilityDepthHow I Apply It
KubernetesAdvancedRunning production-grade workloads with namespaced isolation, RBAC least-privilege, resource governance, Helm-managed releases, and operational discipline applied consistently across every service.
Talos LinuxAdvancedProvisioning Kubernetes nodes on an immutable, API-driven OS with no shell access and no manual state — the OS layer is as declarative and reproducible as the cluster above it.
GitOps / Flux CDAdvancedEnforcing Git as the single source of truth with continuous reconciliation via Flux — no manual kubectl apply, no configuration drift, every change traceable to a commit.
Platform SecurityAdvancedLayering security across the full stack: encrypted secrets committed to Git via Sealed Secrets, continuous vulnerability and misconfiguration scanning with Trivy Operator, and metrics surfaced to Prometheus for security-posture dashboards in Grafana.

Professional Journey
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Each role below built on the last — from hands-on field engineering to enterprise-scale infrastructure leadership across cloud, networking, and security.
  1. Senior IT Officer

    2021 – Present

    Scholastic Asia

    Leading regional IT infrastructure across five Asia-Pacific markets, with accountability for cloud architecture, security posture, and operational continuity at enterprise scale.

    • Architect and maintain AWS environments with security, resilience, and cost governance as core design principles.
    • Direct cross-country network modernization, firewall migration, and SOC enablement programs.
    • Drive CIS Controls v8 enforcement and deliver audit-ready compliance evidence for US InfoSEC validation.
    • Lead major migrations and infrastructure transitions under active production load with zero service impact.
  2. IT Manager / System Integrator

    2019 – 2021

    PilotTV Philippines

    Shaped long-term IT strategy and unified a fragmented technology environment into a coherent, interoperable platform aligned to business operations.

    • Assessed infrastructure maturity and planned future-state capabilities across the organization.
    • Integrated disparate systems and applications to eliminate operational silos and improve reliability.
    • Managed end-to-end integration projects from requirements through delivery, on scope and on schedule.
  3. IT Specialist

    2016 – 2019

    FocusMedia Audiovisual Inc.

    Owned day-to-day IT operations, maintaining endpoint performance, security compliance, and user account governance across the organization.

    • Delivered technical support across hardware and software installation, configuration, and fault resolution.
    • Administered user account lifecycle controls aligned with security policy and access governance standards.
    • Managed software rollouts and system updates to sustain endpoint consistency and operational uptime.
  4. IT Field Engineer

    2014 – 2016

    eMechanics Computer & Peripherals Inc.

    Delivered on-site technical execution for mission-critical deployments across financial services infrastructure, where precision and uptime were non-negotiable.

    • Installed, configured, and network-integrated ATM and POS platforms at client sites nationwide.
    • Executed preventive maintenance and system updates to maximize reliability and minimize service disruption.
    • Coordinated with technical teams to triage and resolve field incidents within SLA windows.
  5. Remote Desktop Specialist

    2013

    Accenture

    Provided enterprise-grade remote technical support, building early foundations in structured problem-solving, security response, and end-user communication under pressure.

    • Resolved complex software issues remotely, reducing end-user downtime and escalation rates.
    • Detected, removed, and remediated malware and cybersecurity threats across managed endpoints.
    • Optimized system performance and stability through targeted diagnostics and tuning protocols.