Sang Nguyễn
Sang Nguyễn

Cloud Security Engineer

Open to offers · Member since 25 Oct 2026
Location
Ho Chi Minh City, Vietnam
Desired salary
Unspecified
Work preference
Remote Only
Experience level
Mid

About

Professional summary

I am a Cloud Security Engineer with more than three years of experience securing cloud environments, operating SOC/SIEM platforms, and performing web application penetration testing. I have worked at VNPAY, a leading Vietnamese FinTech company, and Resola INC, a US-based SaaS company.

I specialize in AWS security architecture, including multi-account environments, IAM, VPC security, CloudTrail, GuardDuty, Security Hub, Config, KMS, Macie, and security governance. I build scalable security controls and automate compliance validation using Terraform, CloudFormation, Lambda, and infrastructure-as-code scanning.

I have hands-on experience in SOC operations, incident response, threat hunting, and SIEM engineering with Wazuh, Splunk, ELK Stack, OpenSearch, Sigma rules, and the MITRE ATT&CK framework. My work includes detection engineering, alert tuning, log pipeline optimization, and automated response workflows.

I am also an active vulnerability researcher and bug bounty hunter on HackerOne. I have responsibly disclosed vulnerabilities in enterprise and open-source platforms, including authorization bypass and SQL injection issues, and contributed to published GHSA/CVE security advisories.

I enjoy building security automation and AI-augmented tooling using Python, Flask, Docker, Claude AI, and security analysis tools. My projects combine cloud security, application security, machine learning-based detection, and automated vulnerability analysis.

I am motivated by solving complex security problems, improving defensive capabilities, and helping engineering teams ship secure systems. I am particularly interested in cloud security engineering, application security, vulnerability research, and security automation roles.

Skills

34 capabilities

Tech stack & tools

Working toolkit

Languages & Frameworks

Experience

Career history

Cloud Security Engineer Resola INC

I design and implement secure AWS architectures for multi-account environments using VPCs, security groups, IAM policies, and AWS Organizations. I build and operate cloud security monitoring with CloudTrail, GuardDuty, Security Hub, AWS Config, and SIEM integrations to provide centralized visibility.

I implement IAM best practices, RBAC, MFA enforcement, identity federation, access reviews, and privilege-escalation testing. I automate CIS AWS Foundations Benchmark compliance checks with Config Rules and Lambda, review Terraform and CloudFormation templates, and integrate Checkov and TFSec into CI/CD pipelines. I also secure ECS, EKS, Lambda, ECR image scanning, and runtime security controls.

Security Engineer VNPAY

I conducted black-box and grey-box penetration tests for internal WAF systems, payment gateways, and new product releases. I identified, reported, and tracked critical vulnerabilities through remediation while supporting ongoing PCI-DSS compliance, risk assessments, and vulnerability-management cycles.

I led Wazuh and Splunk deployment for 24/7 monitoring across more than 500 endpoints and developed custom detection rules aligned with MITRE ATT&CK. I reduced false positives by 40%, led end-to-end security investigations, authored incident-response playbooks, coordinated remediation, and created Python and Bash scripts to automate assessments and log parsing.

Cloud Security Intern VNPAY

I supported a distributed SIEM deployment across hybrid-cloud environments and improved log collection pipelines for multi-cloud infrastructure.

I developed Python parsers for automated CVE analysis and risk-based prioritization. I also configured Splunk dashboards for real-time security event monitoring, alerting, and operational visibility.

Education

Learning history

University of Information Technology – VNU-HCM

Bachelor of Engineering, Information Security

Talented Engineer Program. Research focused on ML-based API attack detection, high-performance SIEM architecture, and security in microservices.

Viettel Digital Talent

Information Security Training, Information Security

Training in advanced web application penetration testing, SIEM architecture, threat hunting, and incident response.

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