Open to opportunities

YanYan Riyan

@yanyanriyan

Message

Cybersecurity analyst specializing in OSINT, threat hunting, and vulnerability assessment.

Indonesia

Message

What I'm looking for

I seek roles emphasizing proactive threat hunting, offensive testing, and collaborative security improvements where I can grow technically and impact client resilience.

I am a cybersecurity analyst experienced in OSINT, threat hunting, vulnerability assessment, and penetration testing, with prior work as a security engineer managing Linux systems and infrastructure.

I have led offensive security engagements across web and mobile applications, supported ongoing client assessments, and contributed to incident investigations and remediation guidance. I hold certifications including eJPT, CTIA, C3SA, CNSP, and CAP.

I focus on practical, repeatable security improvements through attack-surface reviews, automated tooling, and clear operational documentation to improve resilience and reduce exposure.

Experience

Work history, roles, and key accomplishments

Current

Threat Hunting Consultant

Current

ITSEC Asia

Feb 2025 - Present (10 months)

Conduct OSINT-based threat hunting to identify exposed assets and suspicious domains, perform attack surface reviews, and support incident investigations with root cause analysis and remediation recommendations.

OSINT Threat Hunting Vulnerability Assessment Incident Response Shodan Maltego Python

Security Engineer

ITSEC Asia

Jul 2021 - Feb 2025 (3 years 7 months)

Managed and maintained Linux-based systems, deployed and supported physical and virtual servers, performed monitoring and troubleshooting, and improved infrastructure reliability through automation and documentation.

Linux Administration Deploying System Monitoring Troubleshooting Automation Documentation Root Cause Analysis

L1 Support Engineer

Agit

Jul 2020 - Jul 2021 (1 year)

Performed real-time server and application monitoring for Telkomsel, handled support tickets to meet SLAs, conducted initial diagnostics and log reviews, and documented known issues and resolutions.

Monitoring Ticketing Systems Log Review SLA Management Troubleshooting Client Communication

System Engineer

Nodeflux Teknologi Indonesia

Jan 2019 - Apr 2020 (1 year 3 months)

Installed, configured, and deployed AI-based applications and system components at client sites, performed hardware installation and cabling, and provided post-deployment support and documentation.

Deployment Structured Cabling Integration client support

Server and Storage Engineer

Berca Hardayaperkasa

Dec 2016 - Jan 2019 (2 years 1 month)

Monitored and maintained server and enterprise storage infrastructure in a shift-based environment, performed troubleshooting and hardware replacements, and maintained configuration and support documentation.

Storage Systems Troubleshooting Patch Management Documentation

Education

Degrees, certifications, and relevant coursework

Telkom University

Associate Degree (D3), Computer Engineering

2013 - 2016

Grade: GPA: 3.3/4.0

Activities and societies: Final project: Implementation IPS and IDS Using BRO-IDS integrated with SMS Gateway.

Completed an Associate Degree (D3) in Computer Engineering with a final project implementing an IPS/IDS using BRO-IDS integrated with an SMS gateway and a GPA of 3.3/4.0.