Javier Olmedo

Co-Founder

Madrid, Spain10 yrs experience

Most Likely To SwitchHighly Stable

Key Highlights

Over 8 years of experience in offensive security.
Published 18 CVEs for critical vulnerabilities.
Expert in Red Teaming and vulnerability research.

Stackforce AI infers this person is a Cybersecurity Specialist with a focus on Offensive Security and Vulnerability Research.

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Skills

Core Skills

Infrastructure & SecurityFull Stack DevelopmentRed Teaming OperationsInfrastructure SecurityPentesting0-day ResearchSystem AdministrationDev & Automation

Other Skills

EntrepreneurshipManagementNetwork ArchitectureWindows Server AdministrationActive Directory HardeningEndpoint Protection DeploymentLaravelBootstrapAdversary SimulationPenetration TestingNetwork Vulnerability AssessmentOWASP MethodologiesLateral MovementPersistenceVulnerability Research

About

Senior Offensive Security Specialist & Vulnerability Researcher With over 8 years of professional experience, I specialize in Red Teaming operations, advanced evasion techniques, and 0-day discovery. My approach combines deep technical research with a strategic mindset to accurately simulate sophisticated, real-world adversaries and improve enterprise defensive postures. 🎯 Core Expertise: - Advanced Red Teaming & Adversary Simulation (APTs). - Active Directory Exploitation & Lateral Movement. - EDR/AV Evasion & Custom Payload Development. - Command & Control (C2) Infrastructure Operations. - Vulnerability Research & Exploit Development. 🏆 Key Certifications: - OffSec: OSEP | OSWE | OSCP - Zero-Point Security: CRTO (Currently pursuing CRTO II) 🏴 Research & Disclosures: 18x CVEs published regarding critical vulnerabilities in commercial and enterprise software. 🐛 Public Research Profiles: - Exploit-DB: https://www.exploit-db .com/?author=9580 - 0day.today: https://www.0day .today/author/33736

Experience

10 yrs

Total Experience

2 yrs 6 mos

Average Tenure

5 yrs 2 mos

Current Experience

Deloitte

3 roles

Senior Offensive Security Specialist

Promoted

Sep 2025 – Present · 7 mos · Madrid, Community of Madrid, Spain

Delivery Lead

Sep 2022 – Aug 2025 · 2 yrs 11 mos · Madrid, Community of Madrid, Spain

Senior Delivery Consultant

Dec 2020 – Aug 2022 · 1 yr 8 mos · Madrid, Community of Madrid, Spain

Grupo sia

Red Team Operator & Pentester

Nov 2019 – Aug 2020 · 9 mos · Madrid, Community of Madrid, Spain

▪️ Red Teaming Operations: Executed adversary simulation exercises aiming to compromise critical assets, focusing on lateral movement and persistence within corporate environments.
▪️ Infrastructure Security: Conducted comprehensive internal and external infrastructure penetration testing to identify and mitigate network vulnerabilities.
▪️ App Security (Web & Mobile): Performed Black, Grey, and White-box audits on Web and Android applications strictly following OWASP methodologies.

Adversary SimulationPenetration TestingNetwork Vulnerability AssessmentOWASP MethodologiesLateral MovementPersistence+2

Sidertia solutions

Web & Mobile Pentester

Nov 2017 – Nov 2019 · 2 yrs · Madrid, Community of Madrid, Spain

▪️ Pentesting: Executed comprehensive Black/Grey/White-box audits on Web and Mobile applications (iOS/Android) following OWASP methodology, with a focus on Banking & Critical sectors.
▪️0-Day Research & Reversing: Performed reverse engineering on Desktop/Android binaries and conducted vulnerability research identifying 0-day vulnerabilities in commercial software.
▪️Code Review & SAST: Conducted Static Application Security Testing (SAST) and manual source code review on various CMS (Drupal, WordPress) and enterprise environments (WebSphere).

PentestingVulnerability ResearchReverse EngineeringStatic Application Security TestingManual Source Code Review0-Day Research

Nutrytec laboratorios sa

System Administrator & Software Developer

Oct 2015 – Nov 2017 · 2 yrs 1 mo · Toledo, Castile-La Mancha, Spain

▪️ Conducted initial security audits (Web/Infra) and modified public exploits for vulnerability assessment.
▪️ Dev & Automation: Developed internal tools and automation scripts using Python, PowerShell, .NET, and Laravel.
▪️ Infrastructure: Managed Windows Server 2012 R2, Active Directory, and Network Security (WatchGuard, VPNs).

Security AuditsVulnerability AssessmentAutomation ScriptsWindows Server ManagementNetwork SecuritySystem Administration+1

Servicopias - informática e impresión digital

Founder & Lead IT Consultant

Aug 2012 – Sep 2020 · 8 yrs 1 mo · Illescas, Castile-La Mancha, Spain · On-site

▪️ Entrepreneurship & Management: Founded and managed an IT services firm for 8 years, overseeing technical delivery, client portfolios, and business operations alongside other professional roles.
▪️ Infrastructure & Security: Designed and implemented secure network architectures for SMBs, including Windows Server administration, Active Directory hardening, and Endpoint Protection deployment (ESET/Kaspersky).
▪️ Full Stack Development: Led the development of custom web applications and CMS integrations using Laravel and Bootstrap.

EntrepreneurshipManagementNetwork ArchitectureWindows Server AdministrationActive Directory HardeningEndpoint Protection Deployment+4